CN103058467B - Water paper paper-making wastewater efficient treatment and comprehensive recycling method and device - Google Patents
Water paper paper-making wastewater efficient treatment and comprehensive recycling method and device Download PDFInfo
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- CN103058467B CN103058467B CN201310022925.1A CN201310022925A CN103058467B CN 103058467 B CN103058467 B CN 103058467B CN 201310022925 A CN201310022925 A CN 201310022925A CN 103058467 B CN103058467 B CN 103058467B
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- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a water paper paper-making wastewater efficient treatment and comprehensive recycling method and a device. The method comprises the steps of pre-treatment, a hydrolysis reaction, biochemical treatment, separated oxidization, aeration treatment and post-treatment; the device comprises an adjusting tank, a sieving device, an air floating tank, a hydrolysis and acidification tank, an anaerobic tank, an aerobic tank, a sedimentation tank, a clean water disinfection tank and a sludge tank; the adjusting tank, the sieving device, the air floating tank and the hydrolysis and acidification tank are connected in sequence through pipelines; the hydrolysis and acidification tank, the anaerobic tank and the sedimentation tank are communicated in sequence; the clean water disinfection tank is provided with a disinfection opening, a water discharging opening and a sludge discharging opening; and the disinfection opening is connected with a disinfection device; and the sludge discharging opening is connected with the sludge tank through a pipeline. According to the water paper paper-making wastewater efficient treatment and comprehensive recycling method and device, all the functional tanks are integrated and a comprehensive synergistic effect of each tank is expressed and the comprehensive treatment effect is improved. The valuable paper-making raw material resources are recycled, the emission amount is reduced and the output water can reach national A-grade emission standard.
Description
Technical field
The invention belongs to technical field of sewage treatment equipment, belong to pulping wastewater treatment technical field further, be specifically related to a kind of simple and convenient operation and maintenance, good, the reliable waste paper making wastewater of process stabilizing of discharge water quality efficiently processes and comprehensive recycling device.
Background technology
One of four inventions of China of papermaking technology system, along with the progress of technology, papermaking becomes automatic production line by the production of handicraft workshop formula and produces, substantially increase production efficiency, papermaking must produce waste water, even if utilize regenerated papermaking also can at operation waste discharges such as making beating, concentrated, copy papers, more there are deinking, decolouring waste water, containing hemicellulose, xylogen, inorganic acid salt, fiber fines, mineral filler and the pollutent such as ink, dyestuff in waste paper making wastewater, hemicellulose, xylogen mainly form the COD(chemical oxygen demand (COD) of waste water), BOD
5(biochemical oxygen demand (BOD)), fiber fines, mineral filler etc. mainly form SS(suspended substance), ink, dyestuff etc. mainly form colourity and COD.Therefore, unprocessed or deal with the waste paper making wastewater discharge of discharge improperly can cause COD, BOD to environment
5and SS is main environmental pollution, but also directly can not utilize, cause the serious waste of water resources.
BAF (BAF) is the sewage treatment technique risen the nineties in last century, widely popular in developed countries such as America and Europe and Japan.This technique has removes SS, COD, BOD, nitrated, denitrogenation, dephosphorization, removal AOX(objectionable impurities) effect, be characterized in collection bio-oxidation and retain suspended solids and one, save post precipitation pond (second pond), its volumetric loading, hydraulic load are large, hydraulic detention time is short, and required initial cost is few, and effluent quality is good, operation energy consumption is low, economic operating cost.
Anaerobic-aerobic (A/O) technique is that waste water is injected anaerobic pond, and the pollutent ammonifications (N in organic amount or the amino in amino acid) such as the starch in waste water, fiber, carbohydrate dissociate ammonia (NH by the heterotrophic bacteria in pond
3, NH
4+), make suspended contaminant and dissolved organic matter be hydrolyzed to organic acid, make larger molecular organics be classified as small organic molecule, insoluble organism is converted into dissolved organic matter, thus improves the biodegradability of sewage; In Aerobic Pond sufficient oxygen condition under, from the nitrification of oxygen bacterium by NH
3-H(NH
4+) be oxidized to NO
3-, by controlling the denitrification of backflow at heterotrophic bacteria by NO
3-be reduced to molecular nitrogen (N
2), realize the process of sewage.
In existing paper industry, generally take the single or compounding technology of precipitation, air-flotation process, biochemical treatment, BAF, A/O etc. to wastewater treatment.Single precipitation or air-flotation process are difficult to remove solubility COD and BOD
5, and single biochemical treatment is difficult to remove insoluble COD, BOD
5and SS, and single processing contaminants clearance is low, is difficult to the emission standard reaching national regulation, seldom uses; First heavy and chemical flocks and the biochemical treatment combined utilization that generally adopt, although the organic pollutant of a large amount of polymer difficult degradation can be removed, but waste water water yield load performance is low, after process, discharge index is difficult to reach or only can reach existing GB emission standard reluctantly; Also have to adopt and add metal-salt as flocculation agent, although improve flocculation efficiency, do not increase desalination plant and discharge metal-salt then can be caused to exceed standard, otherwise complex treatment process, cost can be caused again high.Superposition that is single or reduction several method has been difficult to adapt to environmental requirement.Also have at present technical finesse waste water such as adopting membrane ultrafiltration, reverse osmosis, electrodialysis, ion-exchange, although these technology can remove the most of pollutent in waste water, have that processing cost is high, water quality and the weak shortcoming of water yield adaptive faculty, be difficult to apply.
Along with the attention of Environmental pollution and the reinforcement of water resources utilization management, the requirement of discharge of wastewater can be more and more tighter, and the cost that utilizes of water resources also can be higher.For this reason, develop a kind of simple process, running cost is low, and effluent quality is good, and the waste paper making wastewater of recoverable resource efficiently processes and seems very meaningful with comprehensive recycling device, be all very favourable for raising water resources and paper making raw material resource utilization.
Summary of the invention
The first object of the present invention is to provide a kind of waste paper making wastewater efficiently to process and comprehensive reutilization method; Second object is to provide the device that the structure of described method is simple, strong adaptability, operation and maintenance are easy, discharge water quality is good, reliable and stable.
The first object of the present invention is achieved in that and comprises pre-treatment, hydrolysis reaction, biochemical treatment, separation of oxygenated, Air Exposure, post-processing step, specifically comprises:
A, pre-treatment: by fiber removal in waste water, gravity flow enters shallow air-floatation system, removes the suspended substance of the overwhelming majority and most of insoluble COD, BOD
5and partial solubility COD, BOD
5;
B, hydrolysis reaction: the water outlet after pre-treatment enters in hydrolysis acidification pool the active sludge adding weight ratio 1 ~ 5 times and carries out process 8 ~ 24h;
C, biochemical treatment: the water outlet after hydrolysis reaction enters A/O biochemistry pool removes overwhelming majority solvability COD, BOD at the effect 24 ~ 72h of anoxic-aerobic microbiological
5and part insoluble COD, BOD
5;
D, separation of oxygenated: the water outlet after biochemical treatment enters settling tank precipitation 8 ~ 24h, and supernatant liquor enters in oxidation reactor the Fenton reagent adding weight ratio 0.01 ~ 0.1 times and carries out oxidizing reaction 8 ~ 12h;
E, Air Exposure: the water outlet after separation of oxygenated enters BAF and carries out biological degradation process, nitration denitrification reaction and filter;
F, aftertreatment: the water outlet after Air Exposure enters heterogeneous air flotation pool again, carry out qualified discharge or reuse after filter-sterilized after the flocculation agent adding weight ratio 0.05 ~ 0.1 times carries out flocculation reaction 2 ~ 6h.
The present invention second object realizes like this, comprise equalizing tank, screening plant, air flotation pool, hydrolysis acidification pool, anaerobic pond, Aerobic Pond settling tank, clear water sterilization pool, sludge sump, described equalizing tank, screening plant, air flotation pool, hydrolysis acidification pool are linked in sequence successively by pipeline, described hydrolysis acidification pool, anaerobic pond, Aerobic Pond, settling tank sequential communication successively, described clear water sterilization pool is provided with sterilization mouth, water port and mud discharging mouth, described sterilization mouth is connected with sterilizing unit, and described mud discharging mouth is connected with sludge sump by pipeline.
The present invention adopts integrated various functional pool in one, plays the comprehensive synergy in each pond, improves comprehensive treatment effect.By preposition fiber screening, air-flotation process, acidication, significantly reduce the suspended substance in waste water and insoluble COD, BOD5, simultaneously can reclaiming paper making raw material or filler after fiber screening and air-flotation process, sludge dewatering; Acidication changes the organism of difficult degradation in waste water the organism of readily biodegradable into again, then through A/O process, precipitate and separate, the operation such as finally carry out BAF filter tank advanced treatment again and disinfect, and successively reduces COD, the BOD in sewage targetedly
5, SS and the noxious pollutant such as nitrogen, phosphorus, the present invention had both reclaimed valuable paper making raw material resource, decreased quantity discharged, and water outlet can be made again to reach national A level emission standard.
Accompanying drawing explanation
Fig. 1 is the inventive method typical process flow figure;
Fig. 2 is apparatus of the present invention one-piece construction schematic diagram;
In figure: 1-equalizing tank, 2-screening plant, 3-air flotation pool, 4-hydrolysis acidification pool, 5-anaerobic pond, the preposition Aerobic Pond of 6-, the rearmounted Aerobic Pond of 7-, 8-settling tank, 9-BAF filter tank, 10-clear water sterilization pool, 11-sludge sump, 12-intermediate pool, 13-oxidation reactor, the heterogeneous air flotation pool of 14-, 15-rotating disk filtration unit, 16-sludge dehydration device, 17-blower fan system, 18-air supporting administration system, 181-PAM(polyacrylamide) dosing system, 182-PAC(polymerize aluminum chloride) dosing system, 19-sterilizing unit, 20-pneumatogen, 21-spiral pump, 22-lifting gear.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but limited the present invention never in any form, and any conversion done based on training centre of the present invention or replacement, all belong to protection scope of the present invention.
Waste paper making wastewater of the present invention efficiently processes and comprises pre-treatment, hydrolysis reaction, biochemical treatment, separation of oxygenated, Air Exposure, post-processing step with comprehensive reutilization method, specifically comprises:
A, pre-treatment: by fiber removal in waste water, gravity flow enters shallow air-floatation system, removes the suspended substance of the overwhelming majority and most of insoluble COD, BOD
5and partial solubility COD, BOD
5;
B, hydrolysis reaction: the water outlet after pre-treatment enters in hydrolysis acidification pool the active sludge adding weight ratio 1 ~ 5 times and carries out process 8 ~ 24h;
C, biochemical treatment: the water outlet after hydrolysis reaction enters A/O biochemistry pool removes overwhelming majority solvability COD, BOD at the effect 24 ~ 72h of anoxic-aerobic microbiological
5and part insoluble COD, BOD
5;
D, separation of oxygenated: the water outlet after biochemical treatment enters settling tank precipitation 8 ~ 24h, and supernatant liquor enters in oxidation reactor the Fenton reagent adding weight ratio 0.01 ~ 0.1 times and carries out oxidizing reaction 8 ~ 12h;
E, Air Exposure: the water outlet after separation of oxygenated enters BAF and carries out biological degradation process, nitration denitrification reaction and filter;
F, aftertreatment: the water outlet after Air Exposure enters heterogeneous air flotation pool again, carry out qualified discharge or reuse after filter-sterilized after the flocculation agent adding weight ratio 0.05 ~ 0.1 times carries out flocculation reaction 2 ~ 6h.
Described fiber removal is removed by fiber screening plant.Before fiber screening, waste water first sends into equalizing tank, mixes well water quality and quantity.
Also comprise before described fiber removal and waste water is introduced into equalizing tank, mix well water quality and quantity.
Described flocculation agent is one or more in inorganic flocculating agent, organic synthesis polymeric flocculant, natural macromolecule flocculating agent, microbial flocculant or composite flocculation agent.
Described sterilization is that one or more using in clorox, dioxide peroxide, Surchlor GR 60 or trichloroisocyanuric acid carry out disinfection.
Described biochemical treatment (A/O) wastewater principle is: the ammonia nitrogen in waste water, under the condition of oxygenation (O section), by nitrifier nitrated be nitric nitrogen, a large amount of nitric nitrogen is back to anoxic section (A section), under anoxic conditions, by the effect of amphimicrobian denitrifying bacteria, using dirty Organic substance in water as electron donor, nitric nitrogen, as electron acceptor(EA), makes nitric nitrogen ripple be reduced to free of contamination nitrogen, escapes into air thus reaches the object of final denitrogenation.Removing phosphorus principle is in anaerobic zone, and the bacterium in mud will be stored at intracellular poly-phosphate and be hydrolyzed, and discharge orthophosphoric acid salt and energy, at this moment the BOD of sewage in anaerobic zone
5value reduces, and phosphorus content raises.And dephosphorization bacterial utilizes the energy of oxidation operation in aerobic zone, a large amount of phosphorus absorbed in mixed solution, be stored in body with the form of poly-phosphate, the phosphorus in water is transferred to again in mud, reaches the object of dephosphorization by getting rid of excess sludge.
The principle of Air Exposure is: in filter tank, load the particulate filter that a certain amount of particle diameter is less, filter material surface grows microbial film, aeration is carried out in inside, filter tank, effluent stream through time, utilize the Strong oxdiative degradation capability of high-concentration biological film amount on filtrate to carry out fast purification to sewage, this is biological Oxidative Degradation Process; Meanwhile, because of effluent stream through time, filtrate is compaction state, the feature utilizing particle diameter of filter medium less and biomembranous biological flocculation, retains a large amount of suspended substances in sewage, and ensures that the microbial film etc. that comes off can not be taken away by water outlet, and this is crown_interception; Run after certain hour, because of the increase of head loss, need carry out back flushing to filter tank, to discharge the suspended substance that retains and to upgrade microbial film, this is backwash process.
The device completing described method of the present invention, comprise equalizing tank 1, screening plant 2, air flotation pool 3, hydrolysis acidification pool 4, anaerobic pond 5, Aerobic Pond, settling tank 8, clear water sterilization pool 10, sludge sump 11, described equalizing tank 1, screening plant 2, air flotation pool 3, hydrolysis acidification pool 4 is linked in sequence successively by pipeline, described hydrolysis acidification pool 4, anaerobic pond 5, Aerobic Pond, settling tank 8 sequential communication successively, described clear water sterilization pool 10 is provided with sterilization mouth, water port and mud discharging mouth, described sterilization mouth is connected with sterilizing unit 19, described mud discharging mouth is connected with sludge sump 11 by pipeline.
Be provided with sewage draining exit bottom described settling tank 8 to be connected with sludge sump 11 by pipeline, between described settling tank 8 and clear water sterilization pool 10, BAF filter tank 9 be set and be linked in sequence successively by pipeline.
Bottom, described BAF filter tank 9 is provided with aeration opening and is connected with blower fan system 17.
Also be provided with intermediate pool 12 and/or oxidation reactor 13 before described BAF filter tank 9, described intermediate pool 12 is connected with the water outlet of settling tank 8, and described intermediate pool 12 water outlet is connected with oxidation reactor 13 or BAF filter tank 9 water inlet.
Described oxidation reactor 13 bottom arranges aerating apparatus and is connected with blower fan system 17.
Described BAF filter tank 9 water outlet is connected with heterogeneous air flotation pool 14, rotating disk filtration unit 15 respectively, and described rotating disk filtration unit 15 is connected with clear water sterilization pool 10 water inlet, and described heterogeneous air flotation pool 14 is connected with air supporting administration system 18.
Described air supporting administration system 18 comprises PAM dosing system 181 and/or PAC dosing system 182.
Comprise sludge dehydration device 16, described sludge sump 11 works with sludge dehydration device 16 and coordinates.
Described Aerobic Pond comprises preposition Aerobic Pond 6 and/or rearmounted Aerobic Pond 7 bottom, arranges aerating apparatus and be connected with blower fan system 17 bottom Aerobic Pond.
Wastewater treatment of the present invention with utilize device to comprise central control unit, respectively screening plant 2, blower fan system 17, sterilizing unit 19 are electrically connected, realize Systematical control, comprise the unlatching etc. of valve or switch.
Described anaerobic pond 5 is provided with whipping appts.
principle of work of the present invention and working process:
The present invention adopts integrated various functional pool in one, plays the comprehensive synergy in each pond, improves comprehensive treatment effect.Waste water, after equalizing tank 1 regulable control, is pumped in screening plant 2 and removes fiber, and one is that fiber can directly be recycled, two loads being reduction of subsequent disposal; The air flotation pool 3 of waste water injection afterwards removes most suspended substance and major part insoluble COD, BOD
5and partial solubility COD, BOD
5, scum silica frost enters sludge sump 11; Water outlet flows into the organism in hydrolysis acidification pool 4, hardly degraded organic substance being changed into readily biodegradable, then water outlet enters in anaerobic pond 5 and preposition Aerobic Pond 6, rearmounted Aerobic Pond 7 successively, carry out anaerobic-aerobic treatment, remove solvability COD, BOD most in waste water
5cOD, BOD insoluble with part
5, and remove a part of nitrogen and phosphorus pollution thing, for better carrying out A/O process, be provided with whipping appts in anaerobic pond 5, preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 bottom have connecting fan system 17 to carry out the aeration head of Air Exposure; Waste water through A/O process enters precipitation process in settling tank 8, and precipitating sludge periodic exhaustion is in sludge sump 11; Supernatant water liquid injects oxidation reactor 13 after modified in intermediate pool 12, produces and passes into oxidation reactor 13 pairs of waste water after air, oxygen or ozone and be oxidized, accelerate the organic decomposition of bio-refractory through pneumatogen 20; Flow in BAF filter tank 9 afterwards and carry out Air Exposure, and flow through in BAF filter tank when having biomembranous filtrate, Strong oxdiative occurs and degrades and retain the suspended substance in waste water; Enter heterogeneous air flotation pool 14 afterwards, drop into coagulating agent PAM, PAC by the PAM dosing system 181 of air supporting administration system 18 and PAC dosing system 182 and carry out coagulating, scum and enter sludge sump 11; After process, water outlet enters rotating disk filtration unit 15 filtering throw out, and clear water enters sterilization pool 10, and reach the object of sterilization with sterilization medicinal powder or ozone gas effect, the water after up to standard directly externally discharges or enters paper manufacturing systems row reuse again; Send into dewatering unit obtains fiber-enriched mud through folded spiral shell formula spiral pump processed after solid substance precipitation in sludge sump, can be used as papermaking filler reuse.
Embodiment 1
Waste water collects equalizing tank 1 after mixing well water quality and quantity, utilize lift pump to be promoted to screening plant 2 and remove fiber wherein, inject air flotation pool 3 afterwards and carry out air-flotation process, scum silica frost enters sludge sump 11, water outlet flows into hydrolysis acidification pool 4 and is hydrolyzed, then water outlet enters anaerobic pond 5 and stops reaction 8h, then enter in preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 and stop 16h, carry out anaerobic-aerobic treatment, water outlet enters precipitation process in settling tank 8, precipitating sludge periodic exhaustion is in sludge sump 11, and supernatant liquor enters in intermediate pool 12 and mixes well the water yield and water quality; Oxidation reactor 13 is injected in intermediate pool 12 water outlet, produce in the waste water that ozone passes in advanced oxidation reactor 13 through pneumatogen 20 and carry out oxygenolysis 8h, water outlet flows in BAF 9 has biomembranous haydite to carry out Strong oxdiative degraded 4h and the suspended substance retained in waste water through surface, water outlet enters heterogeneous air flotation pool 14, PAM dosing system 181 and PAC dosing system input flocculation agent PAM(polyacrylamide by air supporting administration system 18) and PAC(polymerize aluminum chloride) carry out flocculation reaction, scum and enter sludge sump 11; The water outlet of heterogeneous air flotation pool 14 enters rotating disk filtration unit 15, and waste water removes throw out after filtration, finally enters clear water sterilization pool 10, passes into ozone gas by sterilizing unit 19, and after process, water quality reaches GB one-level A mark and externally discharges; Mud in sludge sump 11 after precipitation bed mud enters spiral sludge dewatering machine by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched, recycle as papermaking filler after dehydration.
Embodiment 2
Waste water is promoted to screening plant 2 through lift pump and removes fiber wherein, inject air flotation pool 3 afterwards and carry out air-flotation process, scum silica frost enters sludge sump 11, water outlet flows into hydrolysis acidification pool 4 and is hydrolyzed, and then water outlet enters anaerobic pond 5 and stops reaction 19h, then enters in preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 and stops 53h, carry out anaerobic-aerobic treatment, water outlet enters precipitation process in settling tank 8, and precipitating sludge periodic exhaustion is in sludge sump 11, and supernatant liquor enters in intermediate pool 12 and mixes well the water yield and water quality; Advanced oxidation reactor 13 is injected in intermediate pool 12 water outlet, produce in the waste water that ozone passes in oxidation reactor 13 through pneumatogen 20 and carry out oxygenolysis 12h, water outlet flows in BAF 9 has biomembranous coke to carry out Strong oxdiative degraded 6h and the suspended substance retained in waste water through surface, water outlet enters heterogeneous air flotation pool 14, drop into flocculation agent PAM and PAC by the PAM dosing system 181 of air supporting administration system 18 and PAC dosing system and carry out flocculation reaction, scum and enter sludge sump 11; The water outlet of heterogeneous air flotation pool 14 enters rotating disk filtration unit 15, and waste water removes throw out after filtration, finally enters clear water sterilization pool 10, injects chlorinated lime by sterilizing unit 19, and the rear water quality of process reaches GB one-level A mark and reenters recycling system; Mud in sludge sump 11 after precipitation bed mud enters spiral sludge dewatering machine by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched, recycle as papermaking filler after dehydration.
Embodiment 3
Waste water is promoted to screening plant 2 through lift pump and removes fiber wherein, inject air flotation pool 3 afterwards and carry out air-flotation process, scum silica frost enters sludge sump 11, water outlet flows into hydrolysis acidification pool 4 and is hydrolyzed, and then water outlet enters anaerobic pond 5 and stops reaction 15h, then enters in preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 and stops 35h, carry out anaerobic-aerobic treatment, water outlet enters precipitation process in settling tank 8, and precipitating sludge periodic exhaustion is in sludge sump 11, and supernatant liquor enters in intermediate pool 12 and mixes well the water yield and water quality; Oxidation reactor 13 is injected in intermediate pool 12 water outlet, produce in the waste water that ozone passes in oxidation reactor 13 through pneumatogen 20 and carry out oxygenolysis 2h, water outlet flows in BAF 9 has biomembranous denitrogenation volcanics to carry out Strong oxdiative degraded 8h and the suspended substance retained in waste water through surface, water outlet enters heterogeneous air flotation pool 14, drop into flocculation agent PAM and PAC by the PAM dosing system 181 of air supporting administration system 18 and PAC dosing system and carry out flocculation reaction, scum and enter sludge sump 11; The water outlet of heterogeneous air flotation pool 14 enters rotating disk filtration unit 15, and waste water removes throw out after filtration, finally enters clear water sterilization pool 10, passes into ozone gas by sterilizing unit 19, and the rear water quality of process reaches GB one-level A mark and reenters recycling system; Mud in sludge sump 11 after precipitation bed mud enters centrifugal concentrating water extracter by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched, recycle as papermaking filler after dehydration.
Embodiment 4
Waste water is promoted to screening plant 2 through lift pump and removes fiber wherein, inject air flotation pool 3 afterwards and carry out air-flotation process, scum silica frost enters sludge sump 11, water outlet flows into hydrolysis acidification pool 4 and is hydrolyzed, then water outlet enters anaerobic pond 5 and stops reaction 16h, then enter in preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 and stop 28h, carry out anaerobic-aerobic treatment, water outlet enters precipitation process in settling tank 8, precipitating sludge periodic exhaustion is in sludge sump 11, supernatant liquor flows in BAF 9 has biomembranous denitrogenation volcanics to carry out Strong oxdiative degraded 8h and the suspended substance retained in waste water through surface, water outlet enters clear water sterilization pool 10, ozone gas is passed into by sterilizing unit 19, the rear water quality of process reaches GB one-level A mark and reenters recycling system, mud in sludge sump 11 after precipitation bed mud enters integral type belt type dewaterer by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched, recycle as papermaking filler after dehydration.
Claims (2)
1. a waste water high-efficiency process and comprehensive utilization device, it is characterized in that comprising equalizing tank (1), screening plant (2), air flotation pool (3), hydrolysis acidification pool (4), anaerobic pond (5), Aerobic Pond, settling tank (8), clear water sterilization pool (10), sludge sump (11), it is characterized in that described equalizing tank (1), screening plant (2), air flotation pool (3), hydrolysis acidification pool (4) is linked in sequence successively by pipeline, described hydrolysis acidification pool (4), anaerobic pond (5), Aerobic Pond, settling tank (8) sequential communication successively, described clear water sterilization pool (10) is provided with sterilization mouth, water port and mud discharging mouth, described sterilization mouth is connected with sterilizing unit (19), described mud discharging mouth is connected with sludge sump (11) by pipeline, described settling tank (8) bottom is provided with sewage draining exit and is connected with sludge sump (11) by pipeline, BAF filter tank (9) is set between described settling tank (8) and clear water sterilization pool (10) and is linked in sequence successively by pipeline, described BAF filter tank (9) bottom is provided with aeration opening and is connected with blower fan system (17), described BAF filter tank (9) is front is also provided with intermediate pool (12) and/or oxidation reactor (13), described intermediate pool (12) is connected with the water outlet of settling tank (8), and described intermediate pool (12) water outlet is connected with oxidation reactor (13) or BAF filter tank (9) water inlet, described BAF filter tank (9) water outlet is connected with heterogeneous air flotation pool (14), heterogeneous air flotation pool (14) water outlet is connected with rotating disk filtration unit (15), described rotating disk filtration unit (15) is connected with clear water sterilization pool (10) water inlet, and described heterogeneous air flotation pool (14) is connected with air supporting administration system (18), described air supporting administration system (18) comprises PAM dosing system (181) and/or PAC dosing system (182), described sludge sump (11) works with sludge dehydration device (16) and coordinates.
2. device according to claim 1, is characterized in that described Aerobic Pond comprises preposition Aerobic Pond (6) and/or rearmounted Aerobic Pond (7), arranges aerating apparatus and be connected with blower fan system (17) bottom Aerobic Pond.
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