CN103723884B - The sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen - Google Patents
The sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen Download PDFInfo
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- CN103723884B CN103723884B CN201310639371.XA CN201310639371A CN103723884B CN 103723884 B CN103723884 B CN 103723884B CN 201310639371 A CN201310639371 A CN 201310639371A CN 103723884 B CN103723884 B CN 103723884B
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Abstract
The invention discloses the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, first sewage is entered equalizing tank by mechanical grille, then flow through hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system successively, then flow into monitoring pool; The present invention first carries out deodorizing and the larger molecular organics of degraded by acidication bacterium and Compound-acid to sewage, then pH value of sewage water is regulated by plus-minus neutralization, in-depth process is carried out by advanced split type MBR, CASS reaction tank, NF/RO system successively again after above-mentioned preliminary treatment, high to the clearance of COD, BOD, SS, ammonia nitrogen, all can reach more than 95%, successful, effluent quality can conformance with standard completely.
Description
Technical field
The present invention relates to sewage treatment area, particularly the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen.
Background technology
Along with improving constantly of China's urban life level, domestic refuse amount is also in continuous increase, and China has built a collection of domestic garbage treatment plant, and processing mode mainly contains waste incineration, landfill, compost and comprehensive utilization etc.Wherein, the advantages such as garbage loading embeading is relatively low with its working cost, management is relatively convenient, technology is comparatively ripe become China's present stage particularly trash processing way of extensively adopting of Small Urban.The percolate produced in garbage loading embeading process generally acknowledges high density pollution waste water that is seriously polluted, that be difficult to process, character complexity at present in the world.Build percolate from garbage filling field treatment system, consider each factors such as treatment technology, treatment effect, investment and running cost, along with the enforcement of " household refuse landfill sites Environmental capacity standard " (GB16889-2008), Chinese effluent index request is more strict, and this just proposes new requirement to treatment technology and process is corresponding.
Percolate source and feature:
The generation of percolate by many factors, water yield change greatly and almost irregularities.It is mainly derived from the following aspects: the 1) infiltration of precipitation; 2) inflow of outside surface water; 3) moisture that contains of rubbish itself; 4) water of the anaerobic digestion generation of microorganism; 5) infiltration of underground water.
The percolate of each landfill yard generally has following characteristics:
1) look, smell: percolate all has very high colourity, and its outward appearance is many in dark brown, dun or black, and colourity can reach 2000-4000 doubly (extension rate), and rubbish putrefactive odor is extremely obvious;
2) pH: garbage loading embeading initial stage, the pH of percolate are between 6-7, and along with the passing of landfill time and the stable of landfill yard, pH can be increased to 7-8;
3) BOD, COD concentration: initial landfill stage BOD, COD concentration is lower is thousands of mg/L, landfill 6 months to 2.After 5 years, BOD can up to 30000mg/L up to 10000mg/L, COD.After this concentration starts to decline, but the speed of BOD density loss is greater than COD, until reach stable after 6-l5;
4) biodegradation character: landfill yard BOD/COD value in early stage is between 0.4-0.5, and biodegradability is good; Intermediary and later stages are due to the lowering speed difference of BOD, COD concentration; BOD/COD value is down to last 0.05-0.2 gradually, and biodegradability is deteriorated gradually;
5) SS(suspended substance): concentration is generally at 300-1000mg/L;
6) ammonia nitrogen (ammonia nitrogen): ammonia nitrogen concentration is higher is generally at about 400mg/L, sometimes up to 1000mg/L, even higher;
7) heavy metal: due to categorized consumer waste collect and landfill yard go-no-go not in place, cause many heavy metal waste existence wherein, cause the heavy metal content in percolate to increase.
Summary of the invention
The object of the present invention is to provide the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
The sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, first sewage is entered equalizing tank by mechanical grille, then flow through hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system successively, then flow into monitoring pool; Be provided with acidication bacterium in described hydrolysis acidification pool, also add composite organic acid deodorizing to hydrolysis acidification pool, and adjust ph is 5-6; The DO mass concentration of described biological contact oxidation pond controls as 2-4mg/L; Described neutralization precipitation pond is 7-8 by adding alkali adjust ph; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; Carry out sludge dewatering after the mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system enters sludge sump, sewage transport is to equalizing tank, and mud is transported outward.
As the further scheme of the present invention: in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading N
v=2.5kg/ (m
3d), ask during hydraulic retention as 15h.
As the further scheme of the present invention: described filtering basin are bag type filter device.
As the further scheme of the present invention: described split type MBR is a kind of detachable membrane biochemical reactor, comprise biochemical reactor and two UF systems, biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.
As the further scheme of the present invention: described CASS reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously.
As the present invention's further scheme: described CASS reaction tank establishes 2 altogether, alternate run in parallel.
As the present invention's further scheme: two membranous system that described NF/RO system is made up of NF system and RO system.
As the further scheme of the present invention: described monitoring pool for monitoring effluent quality whether conformance with standard, if meet, then clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention first carries out deodorizing and the larger molecular organics of degraded by acidication bacterium and Compound-acid to sewage, then pH value of sewage water is regulated by plus-minus neutralization, in-depth process is carried out by advanced split type MBR, CASS reaction tank, NF/RO system successively again after above-mentioned preliminary treatment, high to the clearance of COD, BOD, SS, ammonia nitrogen, all can reach more than 95%, successful, effluent quality can conformance with standard completely.
Accompanying drawing explanation
Fig. 1 is that the present invention degrades the sewage treatment process figure of COD, BOD, SS, ammonia nitrogen.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, first sewage is entered equalizing tank by mechanical grille, then flow through hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system successively, then flow into monitoring pool; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; Carry out sludge dewatering after the mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system enters sludge sump, sewage transport is to equalizing tank, and mud is transported outward.
The larger molecular organics of difficult degradation in waste water is first converted into the small organic molecule of easily degrading by the effect of acidication bacterium by described hydrolysis acidification pool, thus improves the biodegradability of subsequent disposal; The built-in combined stuffing of hydrolysis acidification pool; Then add composite organic acid deodorizing to hydrolysis acidification pool, and adjust ph is 5-6, in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading N
v=2.5kg/ (m
3d), ask during hydraulic retention as 15h.
The DO mass concentration of described biological contact oxidation pond controls as 2-4mg/L.Contact oxidation method is a kind of a kind of new wastewater biochemical facture having activated sludge process and biomembrance process feature concurrently.The major equipment of this method is biological contact oxidation filter tank.In air-locked aeration tank, filler is housed, filler is submerged by water, with gas blower aeration aerating bottom filler, air can lower in vain and on, carry pending waste water secretly, in vain by being arrived ground by filtrate part, after air runaway, at filtrate, waste water then asks that lattice return at the bottom of pond on white downwards.Active sludge is attached to filling surface, not with water flow, because microbial film is directly subject to the strong agitation of upstream, constantly updates, thus improves decontamination effect improving.From research conditions both domestic and external, ask when contact oxidation method has process short, volume is little, good purification, effluent quality are good and stablize, the mud advantage that do not need that backflow is not also expanded, power consumption is little etc.
Described neutralization precipitation pond is 7-8 by adding alkali adjust ph, reaches the Optimal pH condition of precipitation.
Described filtering basin are bag type filter device, prepare for sewage enters split type MBR.
Described split type MBR is a kind of detachable membrane biochemical reactor, and comprise biochemical reactor and two UF systems, biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.In nitrating pot, by highly active aerobic microbiological effect, to degrade most of organism, an ammonia nitrogen part is removed by biosynthesizing, major part is transformed into NO3-N and NO2-N under efficient nitrifier effect, be back to denitrification tank, in anaerobic environment, be reduced into nitrogen discharge, reach the object of biological denitrificaion.Nitrating pot water outlet enters UF system, carries out cement separation by UF system, the sludge concentration that sludge reflux makes biochemical reactor keep higher, through the microorganism species of constantly domestication formation, progressively degrade to the organism of difficult for biological degradation in percolate, MBR system water outlet is aseptic, no suspended substance.
Described CASS reaction tank (cyclicactivatedsludgesystem, CASS) be one of Waste Water Treatment core structures, cyclic activated sludge system is the process of aerobic/hypoxic/anaerobic alternate run, the main COD removed in waste water, the pollution substance such as ammonia nitrogen and SS; This reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously; CASS reaction tank establishes 2 altogether, alternate run in parallel.
Described counterbalance cell plays the intermediate equilibria regulating effect of the interval water outlet of CASS reaction tank and NF/RO system continuum micromeehanics.Hydraulic detention time is 15h, inside establishes 2, water pump, Kai Yitai, standby one.
Two membranous system that described NF/RO system is made up of NF system and RO system; Described NF system is located in film treatment plant, adopts dense water internal-circulation type; The rate of recovery: more than 80%; Dow Chemical NF270-400 rolled film: 6; Membrane flux: JNF=22L/h × m
3; Described RO system is located in film process car asks, adopts dense water internal-circulation type; The rate of recovery: more than 80%; Dow Chemical BW30-365-FR rolled film: 6; Membrane flux: JNF=22L/h × m
3.
Described monitoring pool for monitoring effluent quality whether conformance with standard, if meet, then clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
Design objective of the present invention is as shown in table 1
Table 1
Actual water inlet during the invention process and effluent quality as shown in table 2
Table 2
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (7)
1. the sewage water treatment method of the COD that degrades, BOD, SS, ammonia nitrogen, it is characterized in that, first sewage is entered equalizing tank by mechanical grille, then flow through hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system successively, then flow into monitoring pool; Be provided with acidication bacterium in described hydrolysis acidification pool, also add composite organic acid deodorizing to hydrolysis acidification pool, and adjust ph is 5-6; The DO mass concentration of described biological contact oxidation pond controls as 2-4mg/L; Described neutralization precipitation pond is 7-8 by adding alkali adjust ph; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; Sludge dewatering is carried out after the mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system enters sludge sump, sewage transport is to equalizing tank, mud is transported outward, described composite organic acid is made up of citric acid, acetic acid, oxysuccinic acid and boric acid, two membranous system that described NF/RO system is made up of NF system and RO system.
2. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, it is characterized in that, in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading Nv=2.5kg/ (m3d), asks during hydraulic retention as 15h.
3. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, it is characterized in that, described filtering basin are bag type filter device.
4. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, it is characterized in that, described split type MBR is a kind of detachable membrane biochemical reactor, and comprise biochemical reactor and two UF systems, biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.
5. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, it is characterized in that, described CASS reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously.
6. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, it is characterized in that, described CASS reaction tank establishes 2 altogether, alternate run in parallel.
7. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that, described monitoring pool for monitoring effluent quality whether conformance with standard, if meet, then clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
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| CN105236693A (en) * | 2015-11-16 | 2016-01-13 | 广东紫方环保技术有限公司 | Industrial wastewater treatment device and treatment method |
| CN106219887A (en) * | 2016-08-30 | 2016-12-14 | 芜湖华海生物工程有限公司 | A kind of processing method producing waste water for allantoin production process |
| CN106277615A (en) * | 2016-08-30 | 2017-01-04 | 芜湖华海生物工程有限公司 | A kind of allantoin production process produces the process technique of waste water |
| CN107235535B (en) * | 2017-06-23 | 2021-01-01 | 中国矿业大学(北京) | Advanced treatment method for industrial wastewater |
| CN107857435B (en) * | 2017-11-29 | 2019-01-25 | 杨雨洁 | Integrated city trees and shrubs system irrigation water purification and deodoration system |
| CN109019845A (en) * | 2018-08-03 | 2018-12-18 | 巢湖市渔郎渔具有限公司 | A kind of aerobic purification method of manufacture fishing net waste water acidification |
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