CN110194981A - Sludge, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system - Google Patents
Sludge, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system Download PDFInfo
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- CN110194981A CN110194981A CN201910375392.2A CN201910375392A CN110194981A CN 110194981 A CN110194981 A CN 110194981A CN 201910375392 A CN201910375392 A CN 201910375392A CN 110194981 A CN110194981 A CN 110194981A
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- microalgae
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses sludge, microalgae is total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system, including microalgae culturing device adopting and hydrothermal liquefaction reactor, hydrothermal liquefaction reactor is inputted after the microalgae of cultivation is matched in proportion as raw material and sludge, liquid phase in hydrothermal liquefaction reactor thermal decomposition product is input to microalgae culturing device adopting, the raw material cultivated after being mixed in proportion with sewage as microalgae, to sewage purification, avoid the discharge of the carbon nitrogen P elements in liquid phase, present invention economy with higher, environmental and social benefits, the more huge municipal sludge of industry can be effectively applicable to handle and can produce considerable energy economy & environment benefit.
Description
Technical field
The invention belongs to microalgae technical fields more particularly to sludge, microalgae to be total to hydro-thermal liquefaction and waste liquid culture microalgae one
Change cyclic utilization system.
Background technique
Municipal sludge is the by-product during urban wastewater treatment, and specific resistance to filtration problem is faced at present chooses as follows
War: 1) as population increases, the level of urbanization is improved, and sewage treatment plant constantly extends, and municipal sludge yield rises year by year, speedup
Obviously.2005, municipal sludge yield was only 11,080,000 tons, and sludge yield has broken through 50,000,000 tons at present；2) sludge water content is not
It easily removes, moisture content is still up to 80% or more after mechanical dehydration, the traditional treatment method of the municipal sludges such as landfill, compost, burning
It is required to that sludge is carried out desiccation to be dehydrated to moisture content being respectively 60%, 40% and 30% hereinafter, high desiccation cost leads to dirt
Mud processing disposal costs can account for 50% or so of sewage treatment plant's operating cost；3) municipal sludge high organic content, butt heat
Value can achieve 20MJkg-1 and containing heavy metal and toxic pollutant difficult to degrade, and traditional treatment method processing difficulty is big,
Harmless rate is low, and all there are problems that secondary pollution.
Hydrothermal liquefaction is hygrometric state biomass (algae, bacterium, pig manure, wastewater sludge etc.) can be converted into the thermalization of liquid fuel
Reaction process is learned, which can rapidly interrupt larger molecular organics point in biomass under conditions of high temperature and pressure using thermal energy
Sub-key is allowed to be changed into small-molecule substance, obtains liquid biological fuel similar with petroleum crude oil, is expected to the substitution as petroleum
Fuel.Hydrothermal liquefaction has that abundant raw material, biomass conversion rate be fast, more complete etc. advantages of reaction, is renewable energy neck
The hot spot studied in domain.But having on 80% in its four phase product for producing bio oil technique is waste water, and waste water contains greatly
Carbon, nitrogen, phosphorus and the microelement of amount.A large amount of this discharge of wastewater not only results in environmental pollution into environment, and is battalion
Support the waste of element.
Algae is a kind of photosynthetic autotrophs unicellular organism, can capture solar energy, carbon dioxide by photosynthesis, simultaneously
It mushrooms out and breeds using the realization of the nutrients such as nitrogen phosphorus in water body.And algae has resourceful, many kinds of, photosynthetic effect
The feature that rate is high, the speed of growth is fast and adaptable, can grow, therefore be widely used in fresh water, seawater and various sewage
In the biological treatment of various sewage.Hydrothermal liquefaction waste water is handled using microalgae, can get while realizing purification of waste water a large amount of
Raw material of the algal biomass as hydrothermal liquefaction oil-producing is not only realized the recycling of nutrient, the increment of environmental energy, but also is increased
The economic benefit of microalgae bio-fuel industry has multiple benefits.
Summary of the invention
The present invention proposes sludge, microalgae is total to hydro-thermal liquefaction and waste liquid culture is micro- according to problems of the prior art
Algae integration cyclic utilization system, the present invention comprehensively consider ecological, environmental protective, economy, using energy source and social effect, for realization section
Processing municipal sludge is learned, effective use waste resource generates circulation green economy benefit and provides effective way.
The technical solution adopted in the present invention is as follows:
Sludge, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system, including microalgae culturing device adopting
With hydrothermal liquefaction reactor, hydrothermal liquefaction reactor is inputted after the microalgae of cultivation is matched in proportion as raw material and sludge, it will
Liquid phase in hydrothermal liquefaction reactor thermal decomposition product is input to microalgae culturing device adopting, trains after mixing in proportion with sewage as microalgae
The raw material educated avoids the discharge of the carbon nitrogen P elements in liquid phase to sewage purification.
Further, the hydrothermal liquefaction reactor uses salt bath high temperature hydrothermal reactor；
Further, the moisture content for inputting the sludge of hydrothermal liquefaction reactor is 60%~98%；
Further, the microalgae selects length or diameter to be less than the microalgae little particle of 8mm；
Further, the liquid phase carries out gradient dilution, and 1/2 times, 1 times and 2 times standard medium TN content is reached after dilution,
It arranges in pairs or groups again quantitative sewage, the raw material cultivated as microalgae；
Further, the fixation inoculum concentration of the microalgae is 10%, and fixed cultivation temperature is 25 DEG C, and fixed-illumination intensity is
100μmol·m-2·s-1；
Further, the hydrothermal liquefaction reactor thermal decomposition product include gas phase, liquid phase, oil mutually and solid phase, will oil it is mutually and solid
Mutually drying obtains volatilization phase.
Beneficial effects of the present invention:
The present invention realizes sludge and is total to hydro-thermal liquefaction and waste liquid culture microalgae high efficient energy sources using integrated circulation with microalgae
System not only overcomes liquid product and purifies difficulty up to standard, but also successfully discards nutrient using liquid phase and be included in loop body
System, avoids secondary pollution, realizes the increment of environmental energy.
The raw material that liquid product is cultivated as microalgae after sewage collocation dilutes will be discharged, reaction is completed while decontamination
The cultivation of raw material microalgae realizes the energy conservation and cleaning circulation of system.
It is matched the microalgae of fermentation as the sludge of raw material and 85% moisture content, it is effective using its synergistic effect
Improve oil productivity, hydrocarbon content and pollutant Synergistic degradation maximize in oily phase.And each phase under its corresponding operating condition is obtained
The variation tendency of yield, it is determined that optimum operating condition and proportion make the energy recovery rate highest of oil-phase product.
The present invention sufficiently rationally realizes sludge and microalgae is total to hydro-thermal liquefaction and waste liquid culture microalgae high efficient energy sources and utilizes one
The body circulatory system, economy with higher, environmental and social benefits, can be effectively applicable to the more huge municipal sludge of industry
It handles and can produce considerable energy economy & environment benefit.
Detailed description of the invention
Fig. 1 is sludge and microalgae is total to hydro-thermal liquefaction and waste liquid culture microalgae integral system environment increment circulation schematic diagram；
Fig. 2 is that sludge microalgae is total to hydrothermal liquefaction component separation thought guide figure；
Fig. 3 is that the dilution of hydrothermal liquefaction liquid product matches schematic diagram altogether；
Fig. 4 is total hydrothermal liquefaction liquid product microalgae photobiological reactor breeding apparatus schematic diagram；
Fig. 5 is that sludge and microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integral system flow diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, the specific embodiments are only for explaining the present invention, not
For limiting the present invention.
As shown in Figure 1, sludge designed by the present invention, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration circulation benefit
With system, including microalgae culturing device adopting and hydrothermal liquefaction reactor, microalgae culturing device adopting is as shown in figure 4, microalgae culturing device adopting
Sensor is set on outlet pipe and is used to detect growth conditions, end has centrifugal pump is convenient to collect reaction raw materials microalgae rapidly；Air pump
Being responsible for blasting air ensures best gas-liquid mass transfer effect, while after the water-phase product of total hydrothermal liquefaction collocation sewage is handled
It is added to the nutrient cultivated in culture apparatus as microalgae, preferable purification has been carried out to water phase during cultivation, realizes
The cycling and reutilizations of energy resources.
Hydrothermal liquefaction reactor uses salt bath high temperature hydrothermal reactor, such as Fig. 5, the microalgae after choosing culture maturation, cutting
Or length or diameter are ground into less than 50mm, it then sieves, wherein length or diameter is less than to the microalgae little particle and 85% of 8mm
The sludge of moisture content presses different proportion 1:0,3:1,1:1,1:3,1:0, carries out by grinding process input hydrothermal liquefaction reactor
Pyrolysis, pyrolysis institute's calorific requirement are provided by heating furnace, and gradient setting different temperatures is respectively 300 DEG C, and 350 DEG C, 400 DEG C, 500 DEG C,
600 DEG C, the residence time ensures the confidence level of data using control variate method, and the gradient residence time is respectively set under different temperatures
10s, 20s, 30s, 45s, 60s, 90s, 120s, 180s, 240s, 300s；Such as Fig. 2, thermal decomposition product be divided into oily phase, liquid phase, solid phase,
Gas phase and volatilization phase are different to product mutually to be separated and measured.It is gas phase quality that reactor, which opens the of poor quality of front and back, will be remained
Remaining product and methylene chloride cleaning solution are centrifuged after mixing jointly, are divided into 3 layers of upper, middle and lower, and upper layer is liquid phase, centre is solid phase, lower layer
For oily phase, wherein liquid phase is directly taken out and is dried with dropper, and mutually filtering is separated solid phase with oil, and oil-phase product passes through nitrogen evaporator
Be evaporated, solid product drying, during this total mass loss be volatilization phase quality, be mainly derived from liquid phase, solid phase and
The mass loss of low-boiling substance in oily phase drying course.By each phase product quality of determination and products collection efficiency is calculated, finally
It can determine yield and residence time variation tendency under each set temperature.
Fig. 3 chooses liquid phase in the product after pyrolysis and carries out gradient dilution, 1/2 times, 1 times and 2 times standard is reached after dilution and is trained
Base TN content is supported, then is inoculated with microalgae after quantitative sewage treatment plant's sewage of arranging in pairs or groups, fixed inoculum concentration is 10%, and fixed cultivation temperature is
25 DEG C, fixed-illumination intensity is 100 μm of olm-2·s-1, the growth cycle of microalgae is respectively 4 days, 8 days and 12 days.Due to dirt
Mud and microalgae are total to total organic carbon (TOC), ammonia nitrogen (NH in hydrothermal liquefaction product liquid phase3- N), active phosphorus (RP) to reach discharge
Innoxious difficulty is very big, but carbon nitrogen P elements are the essential elements of plant growth, and microalgae can be grown in liquid phase environment and solid
The high magnitude of carbon speed ratio terrestrial plant, the present invention realize that sludge is total to hydro-thermal liquefaction with microalgae and waste liquid culture microalgae is efficient
The using energy source integration circulatory system not only overcomes liquid product and purifies difficulty up to standard, but also successfully discards nutrition using liquid phase
Element is included in circulating system, avoids secondary pollution, realizes the increment of environmental energy.
Above embodiments are merely to illustrate design philosophy and feature of the invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
It is within the scope of the present invention according to equivalent variations made by disclosed principle, mentality of designing or modification.
Claims (7)
1. sludge, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system, which is characterized in that including microalgae
It is anti-to input hydrothermal liquefaction for cultivation apparatus and hydrothermal liquefaction reactor after matching the microalgae of cultivation in proportion with sludge as raw material
Device is answered, the liquid phase in hydrothermal liquefaction reactor thermal decomposition product is input to microalgae culturing device adopting, is made after being mixed in proportion with sewage
The raw material cultivated for microalgae avoids the discharge of the carbon nitrogen P elements in liquid phase to sewage purification.
2. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, the hydrothermal liquefaction reactor uses salt bath high temperature hydrothermal reactor.
3. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, the moisture percentage in sewage sludge of input hydrothermal liquefaction reactor is 60%~98%.
4. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, the microalgae selects length or diameter to be less than the microalgae little particle of 8mm.
5. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, gradient dilution is carried out to the liquid phase, and up to quantitative sewage of arranging in pairs or groups after dilution, the raw material cultivated as microalgae.
6. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, the fixation inoculum concentration of the microalgae is 10%, fixed cultivation temperature is 25 DEG C, and fixed-illumination intensity is 100 μ
mol·m-2·s-1。
7. sludge according to claim 1, microalgae are total to hydro-thermal liquefaction and waste liquid culture microalgae integration cyclic utilization system,
It is characterized in that, the hydrothermal liquefaction reactor thermal decomposition product includes gas phase, liquid phase, oil phase and solid phase, mutually dried oily with solid phase
It is dry to obtain volatilization phase.
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Cited By (5)
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|---|---|---|---|---|
| CN110591919A (en) * | 2019-09-10 | 2019-12-20 | 江苏大学 | Method for cultivating microalgae and preparing bio-oil by using kitchen waste water |
| CN111235022A (en) * | 2020-03-11 | 2020-06-05 | 西安交通大学 | Microalgae carbon sequestration and energy utilization system and method for supercritical water treatment |
| CN111557249A (en) * | 2020-04-08 | 2020-08-21 | 江苏大学 | Pig breeding system utilizing microalgae breeding full-life-cycle multi-element cooperation |
| CN112779044A (en) * | 2021-01-05 | 2021-05-11 | 江苏大学 | Sludge and microalgae supercritical co-rapid hydrothermal liquefaction oil production system and process based on water-phase algae cultivation |
| CN118421350A (en) * | 2024-05-07 | 2024-08-02 | 江西省科学院能源研究所 | Method for preparing biological oil by combining waste rice straw and municipal sludge through hydrothermal liquefaction |
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| CN111557249B (en) * | 2020-04-08 | 2021-12-21 | 江苏大学 | Pig breeding system utilizing microalgae breeding full-life-cycle multi-element cooperation |
| CN112779044A (en) * | 2021-01-05 | 2021-05-11 | 江苏大学 | Sludge and microalgae supercritical co-rapid hydrothermal liquefaction oil production system and process based on water-phase algae cultivation |
| CN118421350A (en) * | 2024-05-07 | 2024-08-02 | 江西省科学院能源研究所 | Method for preparing biological oil by combining waste rice straw and municipal sludge through hydrothermal liquefaction |
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Application publication date: 20190903 |