CN112441804A - Preparation method of dephosphorization and denitrification type biological filter material and application of dephosphorization and denitrification type biological filter material in integrated rural domestic sewage treatment equipment - Google Patents
Preparation method of dephosphorization and denitrification type biological filter material and application of dephosphorization and denitrification type biological filter material in integrated rural domestic sewage treatment equipment Download PDFInfo
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- CN112441804A CN112441804A CN202110121957.1A CN202110121957A CN112441804A CN 112441804 A CN112441804 A CN 112441804A CN 202110121957 A CN202110121957 A CN 202110121957A CN 112441804 A CN112441804 A CN 112441804A
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- denitrification
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- 239000000463 material Substances 0.000 title claims abstract description 82
- 239000010865 sewage Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 25
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 21
- 238000007873 sieving Methods 0.000 claims abstract description 20
- 239000010440 gypsum Substances 0.000 claims abstract description 19
- 235000021190 leftovers Nutrition 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 13
- 239000011593 sulfur Substances 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000011575 calcium Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 17
- 229910052683 pyrite Inorganic materials 0.000 claims description 15
- 239000011028 pyrite Substances 0.000 claims description 15
- 244000005700 microbiome Species 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 8
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 7
- 229910052952 pyrrhotite Inorganic materials 0.000 claims description 7
- 241000276489 Merlangius merlangus Species 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 150000004683 dihydrates Chemical group 0.000 claims description 2
- 229910052960 marcasite Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 7
- 239000011574 phosphorus Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 230000001651 autotrophic effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- CADZRPOVAQTAME-UHFFFAOYSA-L calcium;hydroxy phosphate Chemical compound [Ca+2].OOP([O-])([O-])=O CADZRPOVAQTAME-UHFFFAOYSA-L 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Ceramic Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of sewage treatment, in particular to a preparation method of a dephosphorization and denitrification type biological filter material and application of the dephosphorization and denitrification type biological filter material to integrated rural domestic sewage treatment equipment. The method comprises the following steps: (1) crushing and sieving the leftovers of the autoclaved aerated concrete blocks; (2) crushing and sieving sulfur-containing iron ore and other raw materials; (3) mixing the following components in percentage by weight: 15-25% of cement, 40-50% of autoclaved aerated concrete crushed materials, 10-15% of fly ash, 10-16% of sulfur-containing iron ore powder, 5-10% of lime, 3-5% of gypsum powder, 5-8% of heavy calcium powder and 0.1-0.15% of pore-forming agent; (4) preparing raw material balls by using a granulator; (5) steam pressure curing; the device is used in rural domestic sewage integrated treatment equipment, in particular to an anaerobic filter. The method recycles the autoclaved aerated concrete leftover materials, prepares the nitrogen and phosphorus removal type biological filter material, and enhances the nitrogen and phosphorus removal effect of the rural domestic sewage integrated treatment equipment.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a preparation method of a dephosphorization and denitrification type biological filter material and application of the dephosphorization and denitrification type biological filter material to integrated rural domestic sewage treatment equipment.
Background
With the increasing development of economy in China, the problem of water eutrophication caused by the overproof of a large number of pollutants, particularly nitrogen and phosphorus in water, is also increasing seriously. In rural areas of China, integrated equipment is used for treating rural domestic sewage in a large quantity at present.
The method for removing ammonia nitrogen in domestic sewage, which is widely used at present, mainly comprises a biological contact oxidation method, a biological aerated filter, biological activated carbon and the like, and the main principle is that ammonia nitrogen is converted into nitrate or nitrite by utilizing the adsorption and oxidation of a biological film, so that the aim of removing the ammonia nitrogen in water is fulfilled.
At present, the method for removing nitrate in sewage mainly comprises denitrification, namely, denitrifying bacteria are utilized to convert nitrate or nitrite into nitrogen, and then nitrogen in water is thoroughly removed. The autotrophic denitrification technology can utilize inorganic carbon to synthesize cells and utilize inorganic matters as electron donors to complete the denitrification process, wherein the sulfur/limestone autotrophic denitrification technology utilizes sulfur as electron donors, and overcomes the defect that an additional carbon source is needed in the denitrification process of the sewage with low C/N ratio.
In the process of manufacturing and processing autoclaved aerated concrete, 1-3% of leftovers can be produced, wherein only a small part of leftovers are mixed in concrete mortar and recycled, and most of the leftovers are treated as construction waste to cause great waste of resources when autoclaved blocks are manufactured again.
Chinese patent CN 104193248A discloses a method for preparing non-sintered ceramsite by using waste mortar of a concrete mixing plant. The non-fired ceramsite is prepared by utilizing the waste mortar of a concrete mixing plant and combining the components of cement, fly ash, waste mortar powder, a binder, a pore-forming agent and the like by utilizing an autoclaved technology. According to the method, only 15-25% of waste mortar powder can be recycled, most of the waste mortar is solid particles, the waste mortar is only used as a common filler in the process, other components are basically the same as the raw materials used for common autoclaved aerated concrete blocks, and the porosity and the specific surface area of the final ceramsite are certainly influenced.
The document (journal of environmental engineering, 2013, V7, No.10, P4054-4060) discloses a method for preparing fly ash non-sintered ceramsite, and the heavy metal wastewater purification performance of the fly ash non-sintered ceramsite is tested. The fly ash and the cement are used as raw materials, and an active ingredient FeS is added to prepare the non-fired ceramsite for containing heavy metal Cu2+，Zn2+，Pb2+The wastewater treatment of (3).
Chinese patent CN 102701522A discloses a method for efficiently treating high ammonia nitrogen raw water at low temperature, wherein the ammonia nitrogen of the high ammonia nitrogen raw water is converted into nitrate nitrogen through a biological nitrification unit; then the nitrate nitrogen is converted into nitrogen to be thoroughly removed through a biological ceramsite-sulfur-alkali filter bed. Wherein the biological ceramsite-sulfur-alkali filter bed is prepared by mixing ceramsite, sulfur granules and calcium bicarbonate granules in a grading manner, the nitrate nitrogen removal rate can reach 98% at low temperature, and the ammonia nitrogen removal rate can reach 95%; and the calcium in the effluent can be used as a flocculating agent to strengthen the removal of SS and total phosphorus. However, the biological ceramsite-sulfur-alkali filter bed used in the method is mixed according to the gradation, raw water sequentially passes through the biological ceramsite-sulfur-alkali filter bed, the process equipment is complex, and the sewage treatment time is prolonged.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the preparation method of the dephosphorization denitrogenation type biological filter material overcomes the defects of the prior art, has simple production process, can use a large amount of autoclaved aerated concrete block leftovers without actual utilization value, has high porosity of the prepared biological filter material, greatly increases the attachment capacity of microorganisms, shortens the anaerobic fermentation starting time of rural domestic sewage integrated treatment equipment, saves the production cost and the working procedures of the biological filter material, and has high actual utilization value; the invention also provides application of the biological filter material in integrated rural domestic sewage treatment equipment.
The preparation method of the dephosphorization denitrification biological filter material comprises the following steps:
(1) crushing the autoclaved aerated concrete block leftovers by using a crusher to be less than 1mm, and sieving;
(2) crushing the sulfur-containing iron ore and other raw materials by using a crusher to below 1mm, and sieving;
(3) the following components are put into a mixer according to the weight percentage for mixing:
15-25% of cement, 40-50% of autoclaved aerated concrete crushed materials, 10-15% of fly ash, 10-16% of sulfur-containing iron ore powder, 5-10% of lime, 3-5% of gypsum powder, 5-8% of heavy calcium powder and 0.1-0.15% of pore-forming agent, and uniformly mixing;
(4) and (3) granulation and forming: adding water into the mixed materials, uniformly stirring, and preparing raw material balls with the diameter of 6-10 mm by using a granulator;
(5) and (3) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for autoclaved curing, wherein the curing temperature is 110-120 ℃, and the curing time is 6-8 hours, so as to obtain the dephosphorization and denitrification type biological filter material.
Wherein:
the cement is ordinary portland cement or high-alumina cement, and the ordinary 52.5MPa type portland cement is preferred.
The sulfur-containing iron ore is one or a mixture of more of pyrite, marcasite or pyrrhotite, preferably pyrite, and is crushed to below 200 meshes by a crusher.
The gypsum powder is dihydrate gypsum CaSO4·2H2O, preferably desulfurized gypsum.
The coarse whiting powder is 325 meshes.
The pore-forming agent is one or more of aluminum powder, calcium bicarbonate or sodium bicarbonate, and sodium bicarbonate is preferred.
The application of the dephosphorization and denitrification biological filter material prepared by the preparation method in the integrated rural domestic sewage treatment equipment is specifically as follows: the dephosphorization and denitrification type biological filter material is used in an anaerobic biological filter section of rural domestic sewage integrated treatment equipment and is used as an efficient reaction carrier of anaerobic microorganisms.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method can recycle the waste aerated concrete block leftovers, and changes waste into valuable.
(2) The formula provided by the method has reasonable component proportion, and the high-strength 52.5MPa ordinary portland cement is used, so that the strength of the finally prepared biological filter material is greatly improved, and the cylinder pressure strength can reach 9-10 MPa.
(3) Because the autoclaved aerated concrete block has low density, large specific surface area and multiple pores, the prepared biological filter material has larger specific surface area which can reach more than 5 times of that of a common filter material, can quickly land degraded microorganisms on rural domestic sewage integrated equipment, and shortens the domestic sewage treatment period.
(4) The method uses natural pyrite and pyrrhotite powder to prepare the biological filter material, and the biological filter material is used as an electron donor for denitrification, so that the denitrification effect of the biological filter material can be improved; in addition, the mullite has the self calcium-separating and phosphorus-removing functions, so that the mullite has excellent nitrogen and phosphorus removal composite effect.
(5) Ca (OH) is present in the filter material2And the mineral phases such as C-S-H, Fe-S have very good fixing effect on heavy metal ions, and can effectively remove the heavy metal ions possibly contained in the domestic sewage.
(6) The biological filter material can be produced by the existing autoclaved aerated concrete production process, so that the investment cost of fixed assets is reduced, the production cost is lower, and the market competitive advantage of the product is enhanced.
(7) In the invention, the calcium silicate substance has the capability of slowly releasing calcium ions and alkalinity, is easy to be made into porous materials with various shapes, and has better adsorption effect on phosphate radicals in water. The tobermorite in the autoclaved aerated concrete block can provide calcium ions, so that the tobermorite is combined with phosphate radicals in water, and stable calcium hydroxy phosphate (HAP) is generated on the surface of the tobermorite to realize phosphorus removal.
(8) The invention utilizes the autoclaved aerated concrete block leftovers, including defective products, cutting waste materials and the like, and combines the principle that sulfur or sulfide can be used as an electron donor of denitrifying bacteria, and the like to prepare the denitrification and dephosphorization type biological filter material, and is applied to rural domestic sewage integrated treatment equipment, so that the denitrification and dephosphorization type biological filter material can meet the current denitrification and dephosphorization requirements, can achieve the purpose of recycling wastes, and has extremely high economic and social benefits and environmental protection values.
(9) The method has simple production process, can use a large amount of autoclaved aerated concrete block leftovers without practical utilization value, has high porosity of the prepared biological filter material, greatly increases the attachment capacity of microorganisms, and ensures that anaerobic microorganisms are attached to and grow on the anaerobic filter filler to form a biological membrane, thereby shortening the anaerobic fermentation starting time of rural domestic sewage integrated treatment equipment, saving the production cost and the working procedures of the biological filter material, and having high practical utilization value.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the technical field better understand the scheme of the present invention.
The raw materials used in the examples are specifically as follows:
cement: ordinary 52.5MPa type portland cement.
Gypsum powder: and (4) desulfurized gypsum.
Heavy calcium powder: 325 mesh coarse whiting powder.
Example 1
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to 0.8mm by using a crusher, and sieving;
(2) crushing the pyrite and other raw materials to 0.5mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 16% of cement, 45% of autoclaved aerated concrete crushed material, 10% of fly ash, 12% of pyrite powder, 8% of lime, 3% of gypsum powder, 0.1% of calcium bicarbonate and the balance of heavy calcium carbonate powder, and uniformly mixing;
(4) and (3) mixing the raw materials which are stirred and mixed uniformly in a mixer according to the ratio of the raw materials to the mixed materials 3 in the step (3): 1, adding a certain amount of water, uniformly stirring, and preparing raw material balls with the diameter of 8mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 6.5 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/3 of the total volume of the anaerobic filter, and is used as an efficient reaction carrier of anaerobic microorganisms.
Example 2
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to below 1mm by using a crusher, and sieving;
(2) crushing pyrrhotite ore to below 0.6mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 18% of cement, 43% of autoclaved aerated concrete crushed material, 10% of fly ash, 10% of pyrrhotite powder, 9% of lime, 3% of gypsum powder, 0.1% of sodium bicarbonate and the balance of coarse whiting powder, and uniformly mixing;
(4) and (3) granulation and forming: uniformly stirring and mixing the raw materials in a mixer according to the weight ratio of 2.5: 1, adding water, uniformly stirring, and preparing raw material balls with the diameter of 10mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 7 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to the total volume 1/2 of the anaerobic filter to be used as an efficient reaction carrier of anaerobic microorganisms.
Example 3
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers by using a crusher to below 325 meshes, and sieving;
(2) crushing pyrrhotite ore to below 325 meshes by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 15% of cement, 46% of autoclaved aerated concrete crushed material, 10% of fly ash, 8% of pyrrhotite powder, 8% of lime, 5% of gypsum powder, 0.15% of sodium bicarbonate and the balance of coarse whiting powder, and uniformly mixing;
(4) and (3) granulation and forming: uniformly stirring and mixing the raw materials in a mixer according to the proportion of 3: 1, adding water, uniformly stirring, and preparing raw material balls with the diameter of 7mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 110 ℃, and the curing time is 8 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/2 of the volume of the anaerobic filter, and is used as a high-efficiency reaction carrier of anaerobic microorganisms.
Example 4
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to 0.8mm by using a crusher, and sieving;
(2) crushing the pyrite and other raw materials to 0.5mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 25% of cement, 40% of autoclaved aerated concrete crushed material, 11.9% of fly ash, 10% of pyrite powder, 5% of lime, 3% of gypsum powder, 0.1% of calcium bicarbonate and the balance of heavy calcium carbonate powder, and uniformly mixing;
(4) and (3) mixing the raw materials which are stirred and mixed uniformly in a mixer according to the ratio of the raw materials to the mixed materials 3 in the step (3): 1, adding a certain amount of water, uniformly stirring, and preparing raw material balls with the diameter of 8mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 6.5 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/3 of the total volume of the anaerobic filter, and is used as an efficient reaction carrier of anaerobic microorganisms.
Example 5
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to 0.8mm by using a crusher, and sieving;
(2) crushing the pyrite and other raw materials to 0.5mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 15% of cement, 50% of autoclaved aerated concrete crushed material, 10% of fly ash, 10.9% of pyrite powder, 5% of lime, 3% of gypsum powder, 0.1% of calcium bicarbonate and the balance of heavy calcium carbonate powder, and uniformly mixing;
(4) and (3) mixing the raw materials which are stirred and mixed uniformly in a mixer according to the ratio of the raw materials to the mixed materials 3 in the step (3): 1, adding a certain amount of water, uniformly stirring, and preparing raw material balls with the diameter of 8mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 6.5 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/3 of the total volume of the anaerobic filter, and is used as an efficient reaction carrier of anaerobic microorganisms.
Example 6
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to 0.8mm by using a crusher, and sieving;
(2) crushing the pyrite and other raw materials to 0.5mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 15% of cement, 40% of autoclaved aerated concrete crushed material, 15% of fly ash, 16% of pyrite powder, 5% of lime, 3% of gypsum powder, 0.15% of calcium bicarbonate and the balance of heavy calcium carbonate powder, and uniformly mixing;
(4) and (3) mixing the raw materials which are stirred and mixed uniformly in a mixer according to the ratio of the raw materials to the mixed materials 3 in the step (3): 1, adding a certain amount of water, uniformly stirring, and preparing raw material balls with the diameter of 8mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 6.5 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/3 of the total volume of the anaerobic filter, and is used as an efficient reaction carrier of anaerobic microorganisms.
Example 7
The preparation method of the dephosphorization and denitrification type biological filter material and the application of the dephosphorization and denitrification type biological filter material in the integrated rural domestic sewage treatment equipment are as follows:
(1) crushing the aerated concrete block leftovers to 0.8mm by using a crusher, and sieving;
(2) crushing the pyrite and other raw materials to 0.5mm by using a crusher, and sieving;
(3) putting the following components in a mixer according to the weight ratio for mixing: 17% of cement, 41% of autoclaved aerated concrete crushed material, 11% of fly ash, 11% of pyrite powder, 10% of lime, 4% of gypsum powder, 0.1% of calcium bicarbonate and the balance of heavy calcium carbonate powder, and uniformly mixing;
(4) and (3) mixing the raw materials which are stirred and mixed uniformly in a mixer according to the ratio of the raw materials to the mixed materials 3 in the step (3): 1, adding a certain amount of water, uniformly stirring, and preparing raw material balls with the diameter of 8mm by using a granulator;
(5) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for conventional autoclaved curing, wherein the curing temperature is 120 ℃, and the curing time is 6.5 hours;
(6) in rural domestic sewage integrated treatment equipment, particularly in an anaerobic filter, the biological filter material is added according to 1/3 of the total volume of the anaerobic filter, and is used as an efficient reaction carrier of anaerobic microorganisms.
The performance indexes such as bulk density, specific surface area, porosity, cylinder pressure strength, denitrification/dephosphorization efficiency and the like of the biological filter material prepared in the embodiment 1-7 are measured on rural domestic sewage integrated equipment, and specific measurement results are shown in table 1.
TABLE 1
| Examples | Bulk density kg/m3 | Specific surface area m2/g | Porosity% | Barrel pressure strength Mpa | Denitrification efficiency% | The phosphorus removal efficiency% |
| 1 | 618 | 12.1 | 60.8 | 8.3 | 95.9 | 97 |
| 2 | 622 | 12.1 | 60.3 | 8.6 | 97 | 97.1 |
| 3 | 619 | 12.7 | 60.5 | 8.8 | 96.4 | 97 |
| 4 | 617 | 12.2 | 60.5 | 8.4 | 96.1 | 97 |
| 5 | 615 | 12 | 60.3 | 8.5 | 96.3 | 96.9 |
| 6 | 618 | 12.1 | 60.1 | 8.6 | 95.8 | 97.1 |
| 7 | 621 | 12 | 60.7 | 8.5 | 95.9 | 96.8 |
The method for preparing the denitrification and dephosphorization type biological filter material by using the autoclaved aerated concrete block leftovers provided by the invention is introduced in detail, and the denitrification and dephosphorization performance test is carried out on rural domestic sewage integrated treatment equipment.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A preparation method of a dephosphorization and denitrification biological filter material is characterized by comprising the following steps: the method comprises the following steps:
(1) crushing the autoclaved aerated concrete block leftovers by using a crusher to be less than 1mm, and sieving;
(2) crushing the sulfur-containing iron ore and other raw materials by using a crusher to below 1mm, and sieving;
(3) the following components are put into a mixer according to the weight percentage for mixing:
15-25% of cement, 40-50% of autoclaved aerated concrete crushed materials, 10-15% of fly ash, 10-16% of sulfur-containing iron ore powder, 5-10% of lime, 3-5% of gypsum powder, 5-8% of heavy calcium powder and 0.1-0.15% of pore-forming agent, and uniformly mixing;
(4) and (3) granulation and forming: adding water into the mixed materials, uniformly stirring, and preparing raw material balls with the diameter of 6-10 mm by using a granulator;
(5) and (3) feeding the raw material balls into an autoclaved aerated concrete block curing kettle for autoclaved curing, wherein the curing temperature is 110-120 ℃, and the curing time is 6-8 hours, so as to obtain the dephosphorization and denitrification type biological filter material.
2. The preparation method of the dephosphorization and denitrification biological filter material according to claim 1, which is characterized by comprising the following steps: the cement is ordinary portland cement or high-alumina cement.
3. The preparation method of the dephosphorization and denitrification biological filter material as claimed in claim 2, which is characterized in that: the ordinary Portland cement is ordinary 52.5 MPa-type Portland cement.
4. The preparation method of the dephosphorization and denitrification biological filter material according to claim 1, which is characterized by comprising the following steps: the sulfur-containing iron ore is one or a mixture of more of pyrite, marcasite or pyrrhotite, and is crushed to below 200 meshes by a crusher.
5. The method for preparing the dephosphorization and denitrification biological filter material according to claim 4, which is characterized in that: the sulfur-containing iron ore is pyrite.
6. The preparation method of the dephosphorization and denitrification biological filter material according to claim 1, which is characterized by comprising the following steps: the gypsum powder is dihydrate gypsum CaSO4·2H2O。
7. The method for preparing the dephosphorization and denitrification biological filter material according to claim 6, which is characterized in that: the gypsum powder is desulfurized gypsum.
8. The preparation method of the dephosphorization and denitrification biological filter material according to claim 1, which is characterized by comprising the following steps: the coarse whiting powder is 325 meshes.
9. The preparation method of the dephosphorization and denitrification biological filter material according to claim 1, which is characterized by comprising the following steps: the pore-forming agent is one or more of aluminum powder, calcium bicarbonate or sodium bicarbonate.
10. An application of the dephosphorization and denitrification biological filter material prepared by the preparation method of any one of claims 1 to 9 in integrated rural domestic sewage treatment equipment is characterized in that:
the dephosphorization and denitrification type biological filter material is used in an anaerobic biological filter section of rural domestic sewage integrated treatment equipment and is used as an efficient reaction carrier of anaerobic microorganisms.
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