CN103058467A - 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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- CN103058467A CN103058467A CN2013100229251A CN201310022925A CN103058467A CN 103058467 A CN103058467 A CN 103058467A CN 2013100229251 A CN2013100229251 A CN 2013100229251A CN 201310022925 A CN201310022925 A CN 201310022925A CN 103058467 A CN103058467 A CN 103058467A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004064 recycling Methods 0.000 title abstract description 8
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- 238000007599 discharging Methods 0.000 claims abstract description 14
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- 230000000694 effects Effects 0.000 claims abstract description 9
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (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, further belong to the paper waste processing technology field, be specifically related to a kind of simple and convenient operation and maintenance, good, the reliable waste paper making wastewater of process stabilizing of discharging water quality is efficient processes and comprehensive recycling device.
Background technology
Papermaking technology is one of four inventions of China, progress along with technology, papermaking has become automatic production line production by the production of handicraft workshop formula, greatly improved production efficiency, papermaking must produce waste water, also can pull an oar, concentrate, copy the operation waste discharges such as paper even utilize regenerated papermaking, deinking, decolouring waste water are more arranged, contain the pollutents such as hemicellulose, xylogen, inorganic acid salt, fiber fines, mineral filler and printing ink, dyestuff in the waste paper making wastewater, hemicellulose, xylogen mainly form the COD(chemical oxygen demand (COD) of waste water), BOD
5(biochemical oxygen demand (BOD)), the main SS(suspended substance that forms such as fiber fines, mineral filler), main colourity and the COD of forming such as printing ink, dyestuff.Therefore, waste paper making wastewater discharging meeting unprocessed or that deal with discharging improperly causes COD, BOD to environment
5Reaching SS is main environmental pollution, but also can not directly utilize, and causes the serious waste of water resources.
BAF (BAF) is the sewage treatment technique that rises the nineties in last century, and is widely popular in developed countries such as American-European and Japan.This technique has removes SS, COD, BOD, nitrated, denitrogenation, dephosphorization, removal AOX(objectionable impurities) effect, be characterized in collecting bio-oxidation and hold back suspended solids and one, saved 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 heterotrophic bacteria in the pond dissociates ammonia (NH with pollutent ammonifications (N on organic amount or the amino in the amino acid) such as the starch in the waste water, fiber, carbohydrate
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, thereby improves the biodegradability of sewage; In Aerobic Pond under the condition of sufficient oxygen, from the nitrification of oxygen bacterium with NH
3-H(NH
4+) be oxidized to NO
3-, reflux denitrification at heterotrophic bacteria with NO by control
3-Be reduced to molecular nitrogen (N
2), realize the processing of sewage.
In the existing paper industry, generally take the single or compounding technology of precipitation, air supporting processing, biochemical treatment, BAF, A/O etc. to wastewater treatment.Single precipitation or air supporting are processed and are difficult to remove solubility COD and BOD
5, and single biochemical treatment is difficult to remove non-dissolubility COD, BOD
5And SS, and single technique pollutants removal rate is low, is difficult to reach the emission standard of national regulation, seldom uses; First heavy and chemical flocks and the biochemical treatment combined utilization that generally adopt, although can remove the organic pollutant of a large amount of polymer difficult degradations, but waste water water yield load performance is low, and discharge index is difficult to reach or only can reaches reluctantly existing GB emission standard after processing; Also have and adopt to add metal-salt as flocculation agent, although improved flocculation efficiency, do not increase desalination plant and then can cause the discharging metal-salt to exceed standard, otherwise can cause complex treatment process again, cost is high.Stack single or the reduction several method has been difficult to adapt to environmental requirement.The technical finesse waste water such as the membrane ultrafiltration of employing, reverse osmosis, electrodialysis, ion-exchange are also arranged at present, although these technology can be removed the most of pollutent in the waste water, have processing cost height, water quality and the weak shortcoming of water yield adaptive faculty, be difficult to apply.
Along with the attention of national environmental pollution and the reinforcement of water resources utilization management, the requirement meeting of discharge of wastewater is 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 comprehensive recycling device seems very meaningful, all is very favourable for improving water resources and paper making raw material resource utilization.
Summary of the invention
The first purpose of the present invention is to provide the efficient processing of a kind of waste paper making wastewater and comprehensive reutilization method; The second purpose is to provide that simple in structure, strong adaptability, the operation and maintenance of finishing described method are easy, good, the reliable and stable device of discharging water quality.
The first purpose 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: with fiber removal in the waste water, gravity flow enters the shallow air-floatation system, removes suspended substance and most of non-dissolubility COD, the BOD of the overwhelming majority
5And being partly dissolved property COD, BOD
5
B, hydrolysis reaction: the water outlet after the pre-treatment enters the active sludge that adds 1 ~ 5 times of weight ratio in the hydrolysis acidification pool and processes 8 ~ 24h;
C, biochemical treatment: the water outlet behind the hydrolysis reaction enters the A/O biochemistry pool is removed the overwhelming majority at the effect 24 ~ 72h of anoxic-aerobic microbiological solvability COD, BOD
5And the non-dissolubility COD of part, BOD
5
D, separation of oxygenated: the water outlet after biochemical treatment enters settling tank precipitation 8 ~ 24h, and supernatant liquor enters the Fenton reagent that adds 0.01 ~ 0.1 times of weight ratio in the oxidation reactor and carries out oxidizing reaction 8 ~ 12h;
E, Air Exposure: the water outlet behind separation of oxygenated enters BAF and carries out biological degradation processing, nitration denitrification reaction and filtration;
F, aftertreatment: the water outlet behind the Air Exposure enters heterogeneous air flotation pool again, and the flocculation agent that adds 0.05 ~ 0.1 times of weight ratio carries out carrying out behind flocculation reaction 2 ~ 6h qualified discharge or reuse after the filter-sterilized.
The present invention's the second purpose is to realize 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 successively order are communicated with, 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, brings into play the comprehensive synergy in each pond, improves comprehensive treatment effect.By preposition fiber screening, air supporting processing, acidication, significantly reduce suspended substance and non-dissolubility COD, BOD5 in the waste water, simultaneously can reclaiming paper making raw material or filler after fiber screening and air supporting processing, sludge dewatering; Acidication changes the organism of difficult degradation in the waste water into the organism of readily biodegradable again, again through A/O process, precipitate and separate, the operation such as carry out again at last BAF filter tank advanced treatment and disinfect successively reduces COD, BOD in the sewage targetedly
5, the noxious pollutant such as SS and nitrogen, phosphorus, the present invention had both reclaimed valuable paper making raw material resource, had reduced quantity discharged, can make again water outlet reach national A level emission standard.
Description of drawings
Fig. 1 is the inventive method typical process flow figure;
Fig. 2 is apparatus of the present invention one-piece construction synoptic diagram;
Among the figure: 1-equalizing tank, 2-screening plant, 3-air flotation pool, the 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, the 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, the 181-PAM(polyacrylamide) dosing system, the 182-PAC(polymerize aluminum chloride) dosing system, 19-sterilizing unit, 20-pneumatogen, the 21-spiral pump, the 22-lifting gear.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing, but never in any form the present invention is limited, and any conversion or replacement based on training centre of the present invention is done all belong to protection scope of the present invention.
The efficient processing with comprehensive reutilization method of waste paper making wastewater of the present invention comprises pre-treatment, hydrolysis reaction, biochemical treatment, separation of oxygenated, Air Exposure, post-processing step, specifically comprises:
A, pre-treatment: with fiber removal in the waste water, gravity flow enters the shallow air-floatation system, removes suspended substance and most of non-dissolubility COD, the BOD of the overwhelming majority
5And being partly dissolved property COD, BOD
5
B, hydrolysis reaction: the water outlet after the pre-treatment enters the active sludge that adds 1 ~ 5 times of weight ratio in the hydrolysis acidification pool and processes 8 ~ 24h;
C, biochemical treatment: the water outlet behind the hydrolysis reaction enters the A/O biochemistry pool is removed the overwhelming majority at the effect 24 ~ 72h of anoxic-aerobic microbiological solvability COD, BOD
5And the non-dissolubility COD of part, BOD
5
D, separation of oxygenated: the water outlet after biochemical treatment enters settling tank precipitation 8 ~ 24h, and supernatant liquor enters the Fenton reagent that adds 0.01 ~ 0.1 times of weight ratio in the oxidation reactor and carries out oxidizing reaction 8 ~ 12h;
E, Air Exposure: the water outlet behind separation of oxygenated enters BAF and carries out biological degradation processing, nitration denitrification reaction and filtration;
F, aftertreatment: the water outlet behind the Air Exposure enters heterogeneous air flotation pool again, and the flocculation agent that adds 0.05 ~ 0.1 times of weight ratio carries out carrying out behind flocculation reaction 2 ~ 6h qualified discharge or reuse after the filter-sterilized.
Described fiber removal is to remove by the fiber screening plant.Waste water is sent into first equalizing tank before the fiber screening, mixes well water quality and quantity.
Also comprise before the described fiber removal 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 the composite flocculation agent.
Described sterilization is for using in clorox, dioxide peroxide, Surchlor GR 60 or the trichloroisocyanuric acid one or more to carry out disinfection.
Described biochemical treatment (A/O) wastewater principle is: the ammonia nitrogen in the waste water, under the condition of oxygenation (O section), by nitrifier nitrated be nitric nitrogen, a large amount of nitric nitrogens are back to anoxic section (A section), under anoxia condition, by the effect of amphimicrobian denitrifying bacteria, with organism in the sewage as electron donor, nitric nitrogen makes the nitric nitrogen ripple be reduced to free of contamination nitrogen as electron acceptor(EA), thereby escapes into the purpose that atmosphere reaches final denitrogenation.Removing the phosphorus principle is in anaerobic zone, and the bacterium in the 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 the anaerobic zone
5Value reduces, and phosphorus content raises.And dephosphorization bacterial utilizes the energy of oxidation operation in aerobic zone, absorbs in a large number the phosphorus in the mixed solution, is stored in the body with the form of poly-phosphate, and the phosphorus in the water is transferred to again in the mud, reaches the purpose of dephosphorization by getting rid of excess sludge.
The principle of Air Exposure is: the less particulate filter of a certain amount of particle diameter of filling in the filter tank, the filter material surface microbial film of growing, carry out aeration in inside, filter tank, effluent stream through the time, utilize on the filtrate the strong oxidative degradation ability of high-concentration biological film amount that sewage is carried out fast purification, this is biological Oxidative Degradation Process; Simultaneously, because of effluent stream through the time, filtrate is compaction state, utilizes the less characteristics of particle diameter of filter medium and biomembranous biological flocculation, holds back a large amount of suspended substances in the sewage, and guarantees that the microbial film come off etc. can not taken away by water outlet, this is crown_interception; Behind the operation certain hour, because of the increase of head loss, need to carry out back flushing to the filter tank, the suspended substance of holding back with release also upgrades microbial film, and this is backwash process.
The device of finishing 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 successively order is communicated with, described clear water sterilization pool 10 is provided with the sterilization mouth, water port and mud discharging mouth, described sterilization mouth is connected with sterilizing unit 19, and described mud discharging mouth is connected with sludge sump 11 by pipeline.
Described settling tank 8 bottoms are provided with sewage draining exit and are connected with sludge sump 11 by pipeline, BAF filter tank 9 is set between described settling tank 8 and the clear water sterilization pool 10 and is linked in sequence successively by pipeline.
9 bottoms, described BAF filter tank are provided with aeration opening and are connected with blower fan system 17.
Also be provided with intermediate pool 12 and/or oxidation reactor 13 before the 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 outlets are connected with oxidation reactor 13 or BAF filter tank 9 water inlets.
Described oxidation reactor 13 bottoms arrange aerating apparatus and are connected with blower fan system 17.
Described BAF filter tank 9 water outlets are 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 inlets, 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 cooperates with sludge dehydration device 16 work.
Described Aerobic Pond comprises preposition Aerobic Pond 6 and/or rearmounted Aerobic Pond 7 bottoms, and the Aerobic Pond bottom arranges aerating apparatus and is connected with blower fan system 17.
Wastewater treatment of the present invention and use device comprise central control unit, respectively screening plant 2, blower fan system 17, sterilizing unit 19 are electrically connected, and the control of realization system comprises the unlatching of valve or switch etc.
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, brings into play the comprehensive synergy in each pond, improves comprehensive treatment effect.Waste water is pumped in the screening plant 2 and removes fiber after equalizing tank 1 is regulated control, and the one, fiber can directly be recycled, and the 2nd, reduced the load of subsequent disposal; Waste water injects the air flotation pool 3 most suspended substances of removal and most of non-dissolubility COD, BOD afterwards
5And being partly dissolved property COD, BOD
5, scum silica frost enters sludge sump 11; Water outlet flows into the organism that in the hydrolysis acidification pool 4 hardly degraded organic substance is changed into readily biodegradable, then water outlet enters in anaerobic pond 5 and preposition Aerobic Pond 6, the rearmounted Aerobic Pond 7 successively, carry out anaerobic-aerobic and process, remove solvability COD, BOD most in the waste water
5With the non-dissolubility COD of part, BOD
5, and remove a part of nitrogen and phosphorus pollution thing, and process for better carrying out A/O, be provided with whipping appts in the anaerobic pond 5, preposition Aerobic Pond 6 and rearmounted Aerobic Pond 7 bottoms have connecting fan system 17 to carry out the aeration head of Air Exposure; The waste water of processing through A/O enters precipitation process in the settling tank 8, and precipitating sludge regularly is disposed in the sludge sump 11; Inject oxidation reactor 13 after supernatant water liquid is modified in intermediate pool 12, after pneumatogen 20 produces air, oxygen or ozone, pass into 13 pairs of waste water of oxidation reactor and carry out oxidation, accelerate the organic decomposition of bio-refractory; Flow into afterwards and carry out Air Exposure in the BAF filter tank 9, and when in the BAF filter tank of flowing through biomembranous filtrate being arranged, strong oxidative degradation occurs and hold back suspended substance in the waste water; Enter afterwards heterogeneous air flotation pool 14, the PAM dosing system 181 by air supporting administration system 18 and PAC dosing system 182 drop into coagulating agent PAM, PAC and carry out coagulating, scum and enter sludge sump 11; Water outlet enters rotating disk filtration unit 15 filtering throw outs after processing, and clear water enters sterilization pool 10, reaches the purpose of sterilization with sterilization medicinal powder or ozone gas effect, and the water after up to standard directly externally discharges or enters paper manufacturing systems and goes reuse again; Send into dewatering unit obtains fiber-enriched through folding spiral shell formula spiral pump processed mud after the solid substance precipitation in the sludge sump, can be used as the papermaking filler reuse.
Embodiment 1
Waste water compiles equalizing tank 1 after mixing well water quality and quantity, utilize lift pump to be promoted to the fiber that screening plant 2 is removed wherein, inject afterwards air flotation pool 3 and carry out the air supporting processing, 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 the rearmounted Aerobic Pond 7 and stop 16h, carrying out anaerobic-aerobic processes, water outlet enters precipitation process in the settling tank 8, precipitating sludge regularly is disposed in the sludge sump 11, and supernatant liquor enters and mixes well the water yield and water quality in the intermediate pool 12; Oxidation reactor 13 is injected in intermediate pool 12 water outlets, producing ozone through pneumatogen 20 passes in the waste water in the advanced oxidation reactor 13 and carries out oxygenolysis 8h, water outlet flows in the BAF 9 to be had biomembranous haydite to carry out strong oxidative degradation 4h through the surface and holds back suspended substance in the waste water, water outlet enters heterogeneous air flotation pool 14, PAM dosing system 181 by air supporting administration system 18 and PAC dosing system drop into flocculation agent PAM(polyacrylamide) and the PAC(polymerize aluminum chloride) carry out flocculation reaction, scum and enter sludge sump 11; Heterogeneous air flotation pool 14 water outlets enter 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 processing reaches GB one-level A mark and externally discharges; Mud in the 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 after the dehydration, recycles as papermaking filler.
Waste water is promoted to the fiber that screening plant 2 is removed wherein through lift pump, inject afterwards air flotation pool 3 and carry out the air supporting processing, 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 the rearmounted Aerobic Pond 7 and stops 53h, carrying out anaerobic-aerobic processes, water outlet enters precipitation process in the settling tank 8, and precipitating sludge regularly is disposed in the sludge sump 11, and supernatant liquor enters and mixes well the water yield and water quality in the intermediate pool 12; Advanced oxidation reactor 13 is injected in intermediate pool 12 water outlets, producing ozone through pneumatogen 20 passes in the waste water in the oxidation reactor 13 and carries out oxygenolysis 12h, water outlet flows in the BAF 9 to be had biomembranous coke to carry out strong oxidative degradation 6h through the surface and holds back suspended substance in the waste water, water outlet enters heterogeneous air flotation pool 14, PAM dosing system 181 by air supporting administration system 18 and PAC dosing system drop into flocculation agent PAM and PAC carries out flocculation reaction, scum and enter sludge sump 11; Heterogeneous air flotation pool 14 water outlets enter rotating disk filtration unit 15, and waste water removes throw out after filtration, finally enters clear water sterilization pool 10, inject chlorinated lime by sterilizing unit 19, and the rear water quality of processing reaches GB one-level A indicated weight and newly enters recycling system; Mud in the 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 after the dehydration, recycles as papermaking filler.
Waste water is promoted to the fiber that screening plant 2 is removed wherein through lift pump, inject afterwards air flotation pool 3 and carry out the air supporting processing, 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 the rearmounted Aerobic Pond 7 and stops 35h, carrying out anaerobic-aerobic processes, water outlet enters precipitation process in the settling tank 8, and precipitating sludge regularly is disposed in the sludge sump 11, and supernatant liquor enters and mixes well the water yield and water quality in the intermediate pool 12; Oxidation reactor 13 is injected in intermediate pool 12 water outlets, producing ozone through pneumatogen 20 passes in the waste water in the oxidation reactor 13 and carries out oxygenolysis 2h, water outlet flows in the BAF 9 to be had biomembranous denitrogenation volcanics to carry out strong oxidative degradation 8h through the surface and holds back suspended substance in the waste water, water outlet enters heterogeneous air flotation pool 14, PAM dosing system 181 by air supporting administration system 18 and PAC dosing system drop into flocculation agent PAM and PAC carries out flocculation reaction, scum and enter sludge sump 11; Heterogeneous air flotation pool 14 water outlets enter 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 processing reaches GB one-level A indicated weight and newly enters recycling system; Mud in the sludge sump 11 after precipitation bed mud enters the centrifugal concentrating water extracter by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched after the dehydration, recycles as papermaking filler.
Waste water is promoted to the fiber that screening plant 2 is removed wherein through lift pump, inject afterwards air flotation pool 3 and carry out the air supporting processing, 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 the rearmounted Aerobic Pond 7 and stop 28h, carrying out anaerobic-aerobic processes, water outlet enters precipitation process in the settling tank 8, precipitating sludge regularly is disposed in the sludge sump 11, supernatant liquor flows in the BAF 9 to be had biomembranous denitrogenation volcanics to carry out strong oxidative degradation 8h through the surface and holds back suspended substance in the waste water, water outlet enters clear water sterilization pool 10, pass into ozone gas by sterilizing unit 19, the rear water quality of processing reaches GB one-level A indicated weight and newly enters recycling system; Mud in the sludge sump 11 after precipitation bed mud enters integral type belt water extracter by spiral pump 21 and carries out processed, obtains the mud of fiber-enriched after the dehydration, recycles as papermaking filler.
Claims (10)
1. efficient the processing and comprehensive reutilization method of waste paper making wastewater is characterized in that comprising pre-treatment, hydrolysis reaction, biochemical treatment, separation of oxygenated, Air Exposure, post-processing step, specifically comprises:
A, pre-treatment: with fiber removal in the waste water, gravity flow enters the shallow air-floatation system, removes suspended substance and most of non-dissolubility COD, the BOD of the overwhelming majority
5And being partly dissolved property COD, BOD
5
B, hydrolysis reaction: the water outlet after the pre-treatment enters the active sludge that adds 1 ~ 5 times of weight ratio in the hydrolysis acidification pool and processes 8 ~ 24h;
C, biochemical treatment: the water outlet behind the hydrolysis reaction enters the A/O biochemistry pool is removed the overwhelming majority at the effect 24 ~ 72h of anoxic-aerobic microbiological solvability COD, BOD
5And the non-dissolubility COD of part, BOD
5
D, separation of oxygenated: the water outlet after biochemical treatment enters settling tank precipitation 8 ~ 24h, and supernatant liquor enters the Fenton reagent that adds 0.01 ~ 0.1 times of weight ratio in the oxidation reactor and carries out oxidizing reaction 8 ~ 12h;
E, Air Exposure: the water outlet behind separation of oxygenated enters BAF and carries out biological degradation processing, nitration denitrification reaction and filtration;
F, aftertreatment: the water outlet behind the Air Exposure enters heterogeneous air flotation pool again, and the flocculation agent that adds 0.05 ~ 0.1 times of weight ratio carries out carrying out behind flocculation reaction 2 ~ 6h qualified discharge or reuse after the filter-sterilized.
2. method according to claim 1 is characterized in that described fiber removal is to remove by the fiber screening plant.
3. method according to claim 1 and 2 is characterized in that also comprising before the described fiber removal waste water is sent into first equalizing tank, mixes well water quality and quantity.
4. method according to claim 1 is characterized in that described flocculation agent is one or more in inorganic flocculating agent, organic synthesis polymeric flocculant, natural macromolecule flocculating agent, microbial flocculant or the composite flocculation agent.
5. method according to claim 1 is characterized in that described sterilization is for using in clorox, dioxide peroxide, Surchlor GR 60 or the trichloroisocyanuric acid one or more to carry out disinfection.
6. a waste water high-efficiency of realizing the described method of claim 1 is processed 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) successively order is communicated with, described clear water sterilization pool (10) is provided with the sterilization mouth, water port and mud discharging mouth, described sterilization mouth is connected with sterilizing unit (19), and described mud discharging mouth is connected with sludge sump (11) by pipeline.
7. device according to claim 6, it is characterized in that described heavy, pond, shallow lake (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 the clear water sterilization pool (10) and is 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); Front intermediate pool (12) and/or the oxidation reactor (13) of also being provided with in 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.
8. device according to claim 7, it is characterized in that described BAF filter tank (9) water outlet is connected with heterogeneous air flotation pool (14), rotating disk filtration unit (15) respectively, 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).
9. device according to claim 6 is characterized in that comprising sludge dehydration device (16), and described sludge sump (11) cooperates with sludge dehydration device (16) work.
10. device according to claim 6 is characterized in that described Aerobic Pond comprises preposition Aerobic Pond (6) and/or rearmounted Aerobic Pond (7) bottom, and the Aerobic Pond bottom arranges aerating apparatus and is connected with blower fan system (17).
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| CN112408696A (en) * | 2020-10-27 | 2021-02-26 | 浙江艺谛环境设备有限公司 | Public toilet sewage zero discharge treatment method |
| CN112875955A (en) * | 2021-04-29 | 2021-06-01 | 山东沃华远达环境科技股份有限公司 | Medical sewage integration treatment reaction tank |
| CN112875955B (en) * | 2021-04-29 | 2021-07-16 | 山东沃华远达环境科技股份有限公司 | Medical sewage integration treatment reaction tank |
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