CN103819050A - Method for processing high-density PVA-containing desizing wastewater and device thereof - Google Patents
Method for processing high-density PVA-containing desizing wastewater and device thereof Download PDFInfo
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- CN103819050A CN103819050A CN201410050596.6A CN201410050596A CN103819050A CN 103819050 A CN103819050 A CN 103819050A CN 201410050596 A CN201410050596 A CN 201410050596A CN 103819050 A CN103819050 A CN 103819050A
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Abstract
The invention relates to a method for processing high-density PVA-containing desinzing wastewater and a device thereof. The device comprises a wastewater regulating tank, a coagulation sedimentation tank, a salting-out tank, an advanced oxidation reaction sedimentation tank, a diaphragm type hypoxic-anaerobic reaction tank, an aerobic tank, and a secondary sedimentation tank; the coagulation sedimentation tank, the salting-out tank, and the advanced oxidation reaction sedimentation tank all comprise a mixing and stirring area and a sedimentation area, the diaphragm type hypoxic-anaerobic reaction tank comprises a facultative segment, an anoxic segment, and an anaerobic segment which are formed by separating the diaphragm type hypoxic-anaerobic reaction tank with baffle plates; the water volume and pH value of waste water are adjusted in the wastewater regulating tank, then the wastewater enters the coagulation sedimentation tank and is mixed with a coagulation agent to carry out reactions, then wastewater enters the salting-out tank to carry out a salting-out reaction, the pollutant is oxidized and decomposed in the advanced oxidation reaction sedimentation tank, then wastewater enters the diaphragm type hypoxic-anaerobic reaction tank and the aerobic tank to carry out hypoxic, anaerobic and aerobic reactions, then the waste water is subjected to a sedimentation treatment, and finally the wastewater is discharged when the quality of the wastewater meets standards. The device has the advantages of simple structure, low manufacture cost, and very good processing effect.
Description
Technical field
The present invention relates to technical field of sewage, be specifically related to treatment process and the device of a kind of high density containing PVA desized wastewater.
Background technology
China's textile printing and dyeing wastewater accounts for 35% of discharged volume of industrial waste water, industrial wastewater discharge rich and influential family, desized wastewater is wherein a kind of difficult trade effluent, the water yield and variation water quality are large, complicated component, COD content are high, often contain the difficult for biological degradation pollutents such as polyvinyl alcohol (PVA), biodegradability is poor.
Saltout to mainly contain foam separation, ultrafiltration containing the treatment process of PVA waste water both at home and abroad, oxygenant oxidation, microwave radiation, sonication, advanced oxidation processes, efficient degrading bacteria biological degradation method, Anaerobic biotreatment method, embrane method processing etc.
About the conceptual phase that mostly rests on single technology containing the treatment technology of PVA desized wastewater, often cannot adapt to the actual waste water that dispatches from the factory complicated and changeable at present.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the processing of high density containing PVA desized wastewater complicated and changeable, the invention provides a kind of high density containing PVA desized wastewater treatment process and device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high density is containing PVA desized wastewater treatment process and device, comprises wastewater equalization pond, coagulative precipitation tank, the pond of saltouing, advanced oxidation reaction settling basin, iris type anoxic anaerobic reation pool, Aerobic Pond and second pond; Described wastewater equalization pond, coagulative precipitation tank, the pond of saltouing, advanced oxidation reaction settling basin, iris type anoxic anaerobic reation pool, Aerobic Pond and second pond are communicated with successively.
Described wastewater equalization pond comprises water inlet pipe, pH value measuring and control device and rising pipe, for regulating pH value, water quality and the water yield of desized wastewater.
Described coagulative precipitation tank comprises mix and blend district and settling region, and bottom, mix and blend district is provided with sewage water inlet pipe, and middle and upper part is provided with the liquid add-on system for adding coagulating agent, is provided with whipping appts at middle part, stirring area; In described settling region, be provided with baffle plate, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, and the outlet top of settling region is provided with overfalling weir, and bottom design tapered structure in settling region is provided with sediment discharge valve in bottom, settling region.
The described pond of saltouing comprises mix and blend district and settling region, and bottom, mix and blend district is provided with sewage water inlet pipe, and middle and upper part is provided with liquid add-on system, is provided with whipping appts at middle part, stirring area; In described settling region, be provided with baffle plate, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the outlet top of settling region is provided with overfalling weir, and bottom design tapered structure in settling region is provided with the bleed valve of throw out PVA in settling region bottom.
Described advanced oxidation reaction settling basin comprises mix and blend district and settling region, and bottom, mix and blend district is provided with sewage water inlet pipe, and middle and upper part is provided with the liquid add-on system for adding hydrogen peroxide, ferrous salt, is provided with whipping appts at middle part, stirring area; In described settling region, be provided with baffle plate, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator, the outlet top of settling region is provided with overfalling weir, the tapered structure of settling region bottom design, is provided with sediment discharge valve in bottom, settling region.
Described iris type anoxic anaerobic reation pool comprises the double oxygen section, anoxic section and the anaerobism section that are separated into by flow-stopping plate, described double oxygen section head end is provided with the water inlet pipe for feeding sewage, the oxygen section end of holding concurrently is communicated with anoxic section head end, anoxic section end is communicated with anaerobism section head end, anaerobism section end is provided with triphase separator and overfalling weir, overfalling weir connects rising pipe, the tapered structure of anaerobism section bottom design, and pyramidal structure connects mud discharging valve.In double oxygen section, anoxic section and the anaerobism section of described iris type anoxic anaerobic reation pool, be all provided with the independently exhaust gas centralized tracheae such as methane.
In described Aerobic Pond, middle and lower part arranges water inlet pipe, and described water inlet pipe bottom is provided with water distribution pyrometric cone; Described water distribution pyrometric cone bottom is provided with aeration regulator control system, and described aeration regulator control system comprises aeration plate, gas blower and dissolved oxygen sensing regulation device, and further, described aeration plate is the pore type aeration plate that is evenly provided with micropore.Described aeration plate connects gas blower by aeration tube, and gas blower is arranged on outside Aerobic Pond, and aerobic top, waste water underwater arrange dissolved oxygen sensing regulation device, and described dissolved oxygen sensing regulation device is according to the work of oxygen capacity regulation and control gas blower; The exit of described Aerobic Pond is laid with overflow weir.
The rising pipe of described Aerobic Pond connects second pond, water after treatment qualified discharge after precipitation.
A method that adopts above-mentioned high density to carry out wastewater treatment containing PVA desized wastewater treatment unit, has following steps:
1. high density enters wastewater equalization pond containing PVA desized wastewater by water inlet pipe and regulates pH value, water quality and the water yield.
2. the water after regulating enters coagulative precipitation tank by the water inlet pipe of bottom, coagulative precipitation tank mix and blend district, with mix from the coagulating agent of liquid add-on system, the whipping appts that utilization is arranged on middle part, stirring area stirs, mixed waste water enters settling region, and the triphase separator of settling region is realized mud-water separation.
3. sewage enters by the water inlet pipe of mix and blend district, the pond bottom of saltouing the pond of saltouing, and mixes from the liquid of liquid add-on system, utilizes the whipping appts being arranged in the middle part of stirring area to stir; The waste water reaction of saltouing in settling region, the triphase separator of settling region is realized mud-water separation.
4. the water after salt precipitation enters advanced oxidation reaction settling basin by the water inlet pipe of bottom, advanced oxidation reaction settling basin mix and blend district, mix with the hydrogen peroxide from liquid add-on system, the liquid of ferrous salt, utilize the whipping appts that is arranged on middle part, stirring area to stir; Hydrogen peroxide, ferrous salt reaction produce a large amount of active hydroxyl radical free radicals, destroy the structure of dirty water pollutant, the oxidized decomposition of pollutent in waste water, the waste water after oxygenolysis enters the waste water runner of settling region, and the triphase separator of settling region is realized mud-water separation.
5. mud sinks to the bottom of advanced oxidation reaction settling basin settling region under the effect of gravity, discharges by the sediment discharge valve of bottom.Waste water is communicated with the water inlet pipe of iris type anoxic anaerobic reation pool by overfalling weir, rising pipe and pipe connecting.
6. sewage enters the bottom of iris type anoxic anaerobic reation pool by the hold concurrently water inlet pipe of oxygen section of iris type anoxic anaerobic reation pool; Waste water advances up and down along flow-stopping plate after entering iris type anoxic anaerobic reation pool, pass through successively the Sludge Bed of each reaction chamber of double oxygen section, anoxic section and anaerobism section, the effect that mud in reaction tank rises along with the upper current downflow of waste water and biogas and moving, the settlement action of the barrier effect of flow-stopping plate and mud self makes again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water.The suspended contaminant such as the starch in sewage, fiber, carbohydrate and dissolved organic matter are hydrolyzed to organic acid by the heterotrophic bacterium of amphimicrobe, anoxic section and the anaerobism section of the oxygen section of holding concurrently, make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter.
7. the triphase separator that the waste water after anaerobic reaction is provided with at anaerobism section end is realized the separation of mud, water, methane gas, and mud sinks to anaerobism pars infrasegmentalis under the effect of gravity, and unnecessary mud is discharged by the mud discharging valve of bottom.The waste gas such as the methane that iris type anoxic anaerobic reation pool produces are collected discharge by reaction tank top effuser.Waste water is communicated with the water inlet pipe of Aerobic Pond by overfalling weir, rising pipe and pipe connecting.
8. waste water enters the middle and lower part of Aerobic Pond by water inlet pipe, water distribution uniformity under the effect of water distribution pyrometric cone, described aeration plate is the pore type aeration plate that is evenly provided with micropore, produce a large amount of microbubbles, described dissolved oxygen sensing regulation device is according to the work of oxygen capacity regulation and control gas blower, guarantee that the dissolved oxygen in the water of aerobic contact oxidation pond is greater than 2mg/L, waste water after treatment flows out by overflow weir.
9. the rising pipe of Aerobic Pond connects the water distributor of second pond, the water qualified discharge after precipitation, and a precipitating sludge part for second pond is back to Aerobic Pond, and a part is as excess sludge.
10. outward transport after the excess sludge dehydration that coagulative precipitation tank, advanced oxidation reaction settling basin, iris type anoxic anaerobic reation pool, Aerobic Pond and second pond produce.
The invention has the beneficial effects as follows: the present invention is simple in structure, manufacturing cost is lower, and PVA recycles, and high density is had to extraordinary effect containing PVA desized wastewater processing complicated and changeable, and operational efficiency is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is process flow sheet.
Fig. 2 is the structural representation of embodiment of the present invention coagulative precipitation tank.
In Fig. 2: 2. coagulative precipitation tank, 2-1. stirring area, 2-2. settling region, 2-3. sewage water inlet pipe, 2-4. liquid add-on system, 2-5. whipping appts, 2-6. baffle plate, 2-7. triphase separator, 2-8. overfalling weir, 2-9. sediment discharge valve.
Fig. 3 is the saltout structural representation in pond of the embodiment of the present invention.
In Fig. 3: 3. the pond of saltouing, 3-1. stirring area, 3-2. settling region, 3-3. sewage water inlet pipe, 3-4. liquid add-on system, 3-5. whipping appts, 3-6. baffle plate, 3-7. triphase separator, 3-8. overfalling weir, 3-9. sediment discharge valve.
Fig. 4 is the structural representation of embodiment of the present invention advanced oxidation reaction settling basin.
In Fig. 4: 4. advanced oxidation reaction settling basin, 4-1. stirring area, 4-2. settling region, 4-3. sewage water inlet pipe, 4-4. liquid add-on system, 4-5. whipping appts, 4-6. baffle plate, 4-7. triphase separator, 4-8. overfalling weir, 4-9. sediment discharge valve.
Fig. 5 is the structural representation of embodiment of the present invention iris type anoxic anaerobic reation pool.
In Fig. 5: 5. iris type anoxic anaerobic reation pool, 5-1. flow-stopping plate, the 5-2. oxygen section of holding concurrently, 5-3. anoxic section, 5-4. anaerobism section, 5-5. water inlet pipe, 5-6. triphase separator, 5-7. overfalling weir, 5-8. mud discharging valve, 5-9. upper cover, 5-10. effuser.
Fig. 6 is the structural representation of embodiment of the present invention Aerobic Pond.
In Fig. 6: 6. Aerobic Pond, 6-1. water inlet pipe, 6-2. water distribution pyrometric cone, 6-3. aeration regulator control system, 6-4. overflow weir.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, a kind of high density of the present invention is containing PVA desized wastewater treatment process and device, comprises wastewater equalization pond, coagulative precipitation tank 2, the pond 3 of saltouing, advanced oxidation reaction settling basin 4, iris type anoxic anaerobic reation pool 5, Aerobic Pond 6 and second pond; Described wastewater equalization pond, coagulative precipitation tank 2, the pond 3 of saltouing, advanced oxidation reaction settling basin 4, iris type anoxic anaerobic reation pool 5, Aerobic Pond 6 and second pond are communicated with successively.
Described wastewater equalization pond comprises water inlet pipe, pH value measuring and control device and rising pipe, for regulating pH value, water quality and the water yield of desized wastewater.
Described coagulative precipitation tank 2 comprises mix and blend district 2-1 and settling region 2-2, and bottom, mix and blend district is provided with sewage water inlet pipe 2-3, and middle and upper part is provided with liquid add-on system 2-4, is provided with whipping appts 2-5 at middle part, stirring area; In described settling region, be provided with baffle plate 2-6, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator 2-7, the outlet top of settling region is provided with overfalling weir 2-8, the tapered structure of settling region bottom design, is provided with sediment discharge valve 2-9 in bottom, settling region.
The described pond 3 of saltouing comprises mix and blend district 3-1 and settling region 3-2, and bottom, mix and blend district is provided with sewage water inlet pipe 3-3, and middle and upper part is provided with liquid add-on system 3-4, is provided with whipping appts 3-5 at middle part, stirring area; In described settling region, be provided with baffle plate 3-6, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator 3-7, the outlet top of settling region is provided with overfalling weir 3-8, the tapered structure of settling region bottom design, is provided with sediment discharge valve 3-9 in bottom, settling region.
Described advanced oxidation reaction settling basin 4 comprises mix and blend district 4-1 and settling region 4-2, bottom, mix and blend district is provided with sewage water inlet pipe 4-3, middle and upper part is provided with the liquid add-on system 4-4 for adding hydrogen peroxide, ferrous salt, is provided with whipping appts 4-5 at middle part, stirring area; In described settling region, be provided with baffle plate 4-6, the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator 4-7, the outlet top of settling region is provided with overfalling weir 4-8, the tapered structure of settling region bottom design, is provided with sediment discharge valve 4-9 in bottom, settling region.
Described iris type anoxic anaerobic reation pool 5 comprises double oxygen section 5-2, the anoxic section 5-3 and the anaerobism section 5-4 that are separated into by flow-stopping plate 5-1, described double oxygen section 5-2 head end is provided with the water inlet pipe 5-5 for feeding sewage, the oxygen section 5-2 end of holding concurrently is communicated with anoxic section 5-3 head end, anoxic section 5-3 end is communicated with anaerobism section 5-4 head end, anaerobism section 5-4 end is provided with triphase separator 5-6 and overfalling weir 5-7, overfalling weir 5-7 connects rising pipe, the tapered structure of anaerobism section 5-4 bottom design, pyramidal structure connects mud discharging valve 5-8.The upper cover 5-9 of described iris type anoxic anaerobic reation pool 5 is provided with the exhaust gas centralized tracheae 5-10 such as methane.
The interior middle and lower part of described Aerobic Pond 6 arranges water inlet pipe 6-1, and described water inlet pipe 6-1 bottom is provided with water distribution pyrometric cone 6-2; Described water distribution pyrometric cone 6-2 bottom is provided with aeration regulator control system 6-3, and described aeration regulator control system 6-3 comprises aeration plate, gas blower and dissolved oxygen sensing regulation device, and further, described aeration plate is the pore type aeration plate that is evenly provided with micropore.Described aeration plate connects gas blower by aeration tube, and gas blower is arranged on outside Aerobic Pond, and top, the waste water underwater of Aerobic Pond arrange dissolved oxygen sensing regulation device, and described dissolved oxygen sensing regulation device is according to the work of oxygen capacity regulation and control gas blower; The exit of described Aerobic Pond is laid with overflow weir 6-4.
The rising pipe of described Aerobic Pond connects second pond, water after treatment qualified discharge after precipitation.
A method that adopts above-mentioned high density to carry out wastewater treatment containing PVA desized wastewater treatment unit, has following steps:
1. high density enters wastewater equalization pond containing PVA desized wastewater by water inlet pipe and regulates pH value, water quality and the water yield.
2. the water after regulating enters coagulative precipitation tank 2 by the water inlet pipe 2-3 of coagulative precipitation tank 2 mix and blend district 2-1 bottoms, mixes with the polysilicate sulfuric acid aluminium liquid from liquid add-on system 2-4, utilizes the whipping appts 2-5 that is arranged on middle part, stirring area to stir; Mixed waste water enters the waste water runner of settling region 2-2, and the triphase separator 2-7 of settling region realizes mud-water separation.Mud sinks to the bottom of settling region 2-2 under the effect of gravity, discharges by the sediment discharge valve 2-9 of bottom.Waste water is communicated with the water inlet pipe 3-3 in the pond 3 of saltouing by overfalling weir 2-8, rising pipe and pipe connecting.
Further, coagulating sedimentation condition is: pH is between 5～10, and temperature of reaction is between 20～40 ℃, and sedimentation time is 40～60min, and the dosage of coagulating agent polysilicate sulfuric acid aluminium is definite according to the experiment of waste water quality situation.
3. sewage enters by the water inlet pipe 3-3 of mix and blend district, the pond bottom of saltouing the pond 3 of saltouing, and mixes from the liquid of liquid add-on system, utilizes the whipping appts 3-5 being arranged in the middle part of stirring area to stir; Waste water is in the settling region 3-2 reaction of saltouing, and the triphase separator 3-7 of settling region realizes mud-water separation.The throw outs such as PVA sink to the bottom of settling region 3-2 under the effect of gravity, are discharged and are recycled by the sediment discharge valve 3-9 of bottom.Waste water connects the water inlet pipe 4-3 of advanced oxidation reaction settling basin 4 by overfalling weir 3-8, rising pipe and pipe connecting.
Further, the reaction conditions of saltouing is: 40～50 ℃ of temperature, and pH is between 8.0～9.5, and the reaction times is 30min.The liquid of the interpolation of liquid add-on system is: borax, sodium sulfate and Tai-Ace S 150, dosage is separately definite according to the experiment of waste water quality situation
4. the water after salt precipitation enters advanced oxidation reaction settling basin 4 by the water inlet pipe 4-3 of advanced oxidation reaction settling basin 4 mix and blend district 4-1 bottoms, mix with the hydrogen peroxide from liquid add-on system 4-4, the liquid of ferrous salt, utilize the whipping appts 4-5 that is arranged on middle part, stirring area to stir; Hydrogen peroxide, ferrous salt reaction produce a large amount of active hydroxyl radical free radicals, destroy the structure of dirty water pollutant, the oxidized decomposition of pollutent in waste water, the waste water after oxygenolysis enters the waste water runner of settling region 4-2, and the triphase separator 4-7 of settling region realizes mud-water separation.
Further, the dosage of hydrogen peroxide, ferrous salt liquid is definite according to the experiment of waste water quality situation.
5. mud sinks to the bottom of advanced oxidation reaction settling basin 4 settling region 4-2 under the effect of gravity, discharges by the sediment discharge valve 4-9 of bottom.Waste water is communicated with the water inlet pipe 5-5 of iris type anoxic anaerobic reation pool 5 by overfalling weir 4-8, rising pipe and pipe connecting.
6. the water inlet pipe 5-5 that sewage is held concurrently oxygen section 5-2 by iris type anoxic anaerobic reation pool 5 enters the bottom of iris type anoxic anaerobic reation pool 5; Waste water advances up and down along flow-stopping plate 5-1 after entering reaction tank, pass through successively the Sludge Bed of each reaction chamber of double oxygen section 5-2, anoxic section 5-3 and anaerobism section 5-4, the effect that mud in reaction tank rises along with the upper current downflow of waste water and biogas and moving, the settlement action of the barrier effect of flow-stopping plate 5-1 and mud self makes again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water.The suspended contaminant such as the starch in sewage, fiber, carbohydrate and dissolved organic matter are hydrolyzed to organic acid by the heterotrophic bacterium of amphimicrobe, anoxic section 5-3 and the anaerobism section 5-4 of double oxygen section 5-2, make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter.
7. the triphase separator 5-6 that the waste water after anaerobic reaction is provided with at anaerobism section 5-4 end realizes the separation of mud, water, methane gas, and mud sinks to anaerobism pars infrasegmentalis under the effect of gravity, and unnecessary mud is discharged by the mud discharging valve 5-8 of bottom.The waste gas such as the methane that iris type anoxic anaerobic reation pool produces are collected discharge by reaction tank top effuser 5-10.Waste water is communicated with the water inlet pipe 6-1 of Aerobic Pond 6 by overfalling weir 5-7, rising pipe and pipe connecting.
8. waste water enters the middle and lower part of Aerobic Pond by water inlet pipe 6-1, water distribution uniformity under the effect of water distribution pyrometric cone 6-2, described aeration plate is the pore type aeration plate that is evenly provided with micropore, produce a large amount of microbubbles, described dissolved oxygen sensing regulation device, according to the work of oxygen capacity regulation and control gas blower, guarantees that the dissolved oxygen in Aerobic Pond water is greater than 2mg/L; Waste water after treatment flows out by overflow weir 6-4.
9. the rising pipe of Aerobic Pond 6 connects the water distributor of second pond, the water qualified discharge after precipitation, and a precipitating sludge part for second pond is back to Aerobic Pond, and a part is as excess sludge.
10. outward transport after the excess sludge dehydration that coagulative precipitation tank 2, advanced oxidation reaction settling basin 4, iris type anoxic anaerobic reation pool 5, Aerobic Pond 6 and second pond produce.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can carry out various change and modification completely in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to claim scope.
Claims (2)
1. high density, containing PVA desized wastewater treatment process and a device, comprises wastewater equalization pond, coagulative precipitation tank (2), the pond of saltouing (3), advanced oxidation reaction settling basin (4), iris type anoxic anaerobic reation pool (5), Aerobic Pond (6) and second pond.
Described wastewater equalization pond comprises water inlet pipe, pH value measuring and control device and rising pipe, for regulating pH value, water quality and the water yield of desized wastewater.
Described coagulative precipitation tank (2) comprises mix and blend district (2-1) and settling region (2-2), and bottom, mix and blend district is provided with sewage water inlet pipe (2-3), and middle and upper part is provided with liquid add-on system (2-4), is provided with whipping appts (2-5) at middle part, stirring area; In described settling region, be provided with baffle plate (2-6), the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator (2-7), the outlet top of settling region is provided with overfalling weir (2-8), the tapered structure of settling region bottom design, is provided with sediment discharge valve (2-9) in bottom, settling region.
The described pond of saltouing (3) comprises mix and blend district (3-1) and settling region (3-2), and bottom, mix and blend district is provided with sewage water inlet pipe (3-3), and middle and upper part is provided with liquid add-on system (3-4), is provided with whipping appts (3-5) at middle part, stirring area; In described settling region, be provided with baffle plate (3-6), the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator (3-7), the outlet top of settling region is provided with overfalling weir (3-8), the tapered structure of settling region bottom design, is provided with sediment discharge valve (3-9) in bottom, settling region.
Described advanced oxidation reaction settling basin (4) comprises mix and blend district (4-1) and settling region (4-2), bottom, mix and blend district is provided with sewage water inlet pipe (4-3), middle and upper part is provided with the liquid add-on system (4-4) for adding hydrogen peroxide, ferrous salt, is provided with whipping appts (4-5) at middle part, stirring area; In described settling region, be provided with baffle plate (4-6), the inwall of this baffle plate and settling tank forms the waste water runner that enters settling region as waste water, the exit of settling region is provided with triphase separator (4-7), the outlet top of settling region is provided with overfalling weir (4-8), the tapered structure of settling region bottom design, is provided with sediment discharge valve (4-9) in bottom, settling region.
Described iris type anoxic anaerobic reation pool (5) comprises the double oxygen section (5-2) being separated into by flow-stopping plate (5-1), anoxic section (5-3) and anaerobism section (5-4), described double oxygen section (5-2) head end is provided with the water inlet pipe (5-5) for feeding sewage, oxygen section (5-2) end of holding concurrently is communicated with anoxic section (5-3) head end, anoxic section (5-3) end is communicated with anaerobism section (5-4) head end, anaerobism section (5-4) end is provided with triphase separator (5-6) and overfalling weir (5-7), overfalling weir (5-7) connects rising pipe, the tapered structure of anaerobism section (5-4) bottom design, pyramidal structure connects mud discharging valve (5-8).The upper cover (5-9) of described iris type anoxic anaerobic reation pool (5) is provided with the exhaust gas centralized tracheaes (5-10) such as methane.
The interior middle and lower part of described Aerobic Pond (6) arranges water inlet pipe (6-1), and described water inlet pipe (6-1) bottom is provided with water distribution pyrometric cone (6-2); Described water distribution pyrometric cone (6-2) bottom is provided with aeration regulator control system (6-3), described aeration regulator control system (6-3) comprises aeration plate, gas blower and dissolved oxygen sensing regulation device, further, described aeration plate is the pore type aeration plate that is evenly provided with micropore.Described aeration plate connects gas blower by aeration tube, and gas blower is arranged on outside Aerobic Pond, and top, the waste water underwater of Aerobic Pond arrange dissolved oxygen sensing regulation device, and described dissolved oxygen sensing regulation device is according to the work of oxygen capacity regulation and control gas blower; Exit is laid with overflow weir (6-4).
2. a method that adopts high density as claimed in claim 1 to carry out wastewater treatment containing PVA desized wastewater treatment unit, has following steps:
1. high density enters wastewater equalization pond containing PVA desized wastewater by water inlet pipe and regulates pH value, water quality and the water yield.
2. the water after regulating enters coagulative precipitation tank (2) by the water inlet pipe (2-3) of bottom, coagulative precipitation tank (2) mix and blend district (2-1), mix with the polysilicate sulfuric acid aluminium liquid from liquid add-on system (2-4), utilize the whipping appts (2-5) that is arranged on middle part, stirring area to stir; Mixed waste water enters the waste water runner of settling region (2-2), and the triphase separator (2-7) of settling region is realized mud-water separation.Mud sinks to the bottom of settling region (2-2) under the effect of gravity, discharges by the sediment discharge valve (2-9) of bottom.Waste water is communicated with the water inlet pipe (3-3) of pond (3) of saltouing by overfalling weir (2-8), rising pipe and pipe connecting.
Further, coagulating sedimentation condition is: pH is between 5～10, and temperature of reaction is between 20～40 ℃, and sedimentation time is 40～60min, and the dosage of coagulating agent polysilicate sulfuric acid aluminium is definite according to the experiment of waste water quality situation.
3. sewage enters the pond of saltouing (3) by the water inlet pipe (3-3) of mix and blend district, the pond of saltouing (3) bottom, and mixes from the liquid of liquid add-on system, utilizes the whipping appts (3-5) being arranged in the middle part of stirring area to stir; Waste water is (3-2) reaction of saltouing in settling region, and the triphase separator (3-7) of settling region is realized mud-water separation.The throw outs such as PVA sink to the bottom of settling region (3-2) under the effect of gravity, are discharged and are reclaimed by the sediment discharge valve (3-9) of bottom.Waste water is communicated with the water inlet pipe (4-3) of advanced oxidation reaction settling basin (4) by overfalling weir (3-8), rising pipe and pipe connecting.
Further, the reaction conditions of saltouing is: 40～50 ℃ of temperature, and pH is between 8.0～9.5, and the reaction times is 30min.The liquid that liquid add-on system adds is: borax, sodium sulfate and Tai-Ace S 150, dosage is definite according to the experiment of waste water quality situation.
4. the water after salt precipitation enters advanced oxidation reaction settling basin (4) by the water inlet pipe (4-3) of bottom, advanced oxidation reaction settling basin (4) mix and blend district (4-1), mix with the hydrogen peroxide from liquid add-on system (4-4), the liquid of ferrous salt, utilize the whipping appts (4-5) that is arranged on middle part, stirring area to stir; Hydrogen peroxide, ferrous salt reaction produce a large amount of active hydroxyl radical free radicals, destroy the structure of dirty water pollutant, the oxidized decomposition of pollutent in waste water, the waste water after oxygenolysis enters the waste water runner of settling region (4-2), and the triphase separator (4-7) of settling region is realized mud-water separation.
Further, the dosage of hydrogen peroxide and ferrous salt liquid is definite according to the experiment of waste water quality situation.
5. mud sinks to the bottom of advanced oxidation reaction settling basin (4) settling region (4-2) under the effect of gravity, discharges by the sediment discharge valve (4-9) of bottom.Waste water is communicated with the water inlet pipe (5-5) of iris type anoxic anaerobic reation pool (5) by overfalling weir (4-8), rising pipe and pipe connecting.
6. sewage enters the bottom of iris type anoxic anaerobic reation pool (5) by the water inlet pipe (5-5) of the double oxygen section (5-2) of iris type anoxic anaerobic reation pool (5); Waste water advances up and down along flow-stopping plate (5-1) after entering reaction tank, pass through successively the Sludge Bed of each reaction chamber of double oxygen section (5-2), anoxic section (5-3) and anaerobism section (5-4), the effect that mud in reaction tank rises along with the upper current downflow of waste water and biogas and moving, the barrier effect of flow-stopping plate (5-1) and the settlement action of mud self make again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water.The suspended contaminant such as the starch in sewage, fiber, carbohydrate and dissolved organic matter are hydrolyzed to organic acid by the heterotrophic bacterium of amphimicrobe, anoxic section (5-3) and the anaerobism section (5-4) of the oxygen section (5-2) of holding concurrently, make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter.
7. the triphase separator (5-6) that the waste water after anaerobic reaction is provided with at anaerobism section (5-4) end is realized the separation of mud, water, methane gas, and mud sinks to anaerobism pars infrasegmentalis under the effect of gravity, discharges by the mud discharging valve (5-8) of bottom.The waste gas such as the methane that iris type anoxic anaerobic reation pool produces are collected discharge by reaction tank top effuser (5-10).Waste water is communicated with the water inlet pipe (6-1) of Aerobic Pond (6) by overfalling weir (5-7), rising pipe and pipe connecting.
8. waste water enters the middle and lower part of Aerobic Pond by water inlet pipe (6-1), water distribution uniformity under the effect of water distribution pyrometric cone (6-2), described aeration plate is the pore type aeration plate that is evenly provided with micropore, produce a large amount of microbubbles, described dissolved oxygen sensing regulation device, according to the work of oxygen capacity regulation and control gas blower, guarantees that the dissolved oxygen in Aerobic Pond water is greater than 2mg/L; Waste water after treatment flows out by overflow weir (6-4).
9. the rising pipe of Aerobic Pond (6) connects the water distributor of second pond, the water qualified discharge after precipitation, and a precipitating sludge part for second pond is back to Aerobic Pond, and a part is as excess sludge.
10. outward transport after the excess sludge dehydration that coagulative precipitation tank (2), advanced oxidation reaction settling basin (4), iris type anoxic anaerobic reation pool (5), Aerobic Pond (6) and second pond produce.
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