CN106630388A - Overall energy-saving method for industrial park sewage treatment - Google Patents

Overall energy-saving method for industrial park sewage treatment Download PDF

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Publication number
CN106630388A
CN106630388A CN201611040373.7A CN201611040373A CN106630388A CN 106630388 A CN106630388 A CN 106630388A CN 201611040373 A CN201611040373 A CN 201611040373A CN 106630388 A CN106630388 A CN 106630388A
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sewage
sludge
treatment
energy
biochemical
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CN106630388B (en
Inventor
李慧
卢学强
刘红磊
邵晓龙
李艳英
于丹
张彦
陈晨
马喆
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Tianjin Institute of ecological and Environmental Sciences
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Tianjin Academy of Environmental Sciences
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Treatment Of Sludge (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The invention discloses an overall energy-saving method for industrial park sewage treatment. The method aims to optimize the overall course for industrial park sewage treatment, the relation between enterprise sewage pretreatment and tail end sewage treatment process in a park is comprehensively considered, an enterprise sewage pretreatment aerobic biochemical process is canceled, organic matter is treated in a sewage treatment plant in the park, and the problem that carbon source is insufficient in denitrification sections in the tail end sewage treatment plant is solved; moreover, a technological link of energy extraction is arranged in a sewage treatment system in the park, namely an enhanced primary treatment, high-rate biochemical treatment and anaerobic sludge digestion system is provided for recycling energy; the effects of reducing sewage treatment energy consumption and extracting energy from sewage to be fed to sewage treatment are realized. The method has particularly obvious effect for sewage treatment plants, with the water treatment capacity being greater than 100 thousand tons/day, in industrial parks.

Description

A kind of whole energy method of industrial park sewage disposal
Technical field
The present invention relates to a kind of whole energy method of industrial park sewage disposal, belongs to industrial park sewage disposal neck Domain.
Background technology
Existing industrial park waste water processes are for " enterprise's sewage is arranged Jing after the process of enterprises sewage disinfection treatment facility After entering garden sewage treatment plant after further treatment, external environment is discharged ".Its existing sewage disposal is primarily present two problems, its One is the industrial park entirety sewage treatment process technology that is " consuming energy ", i.e. enterprise's sewage disinfection treatment and garden sewage disposal Factory employs and the organic matter in sewage is converted into CO by aerobic biochemical not to the Organic substance in water recovery energy2、H2O's " consuming energy " handling process, expends mass energy.It two is that whole process front and rear sections aerobic treatment section in industrial park repeats Aerobic biochemical excessively eliminates organic carbon source in Construction Problems, i.e. front end enterprise sewage disinfection treatment, causes end sewage treatment plant Denitrification denitrogenation section carbon source is not enough, need to additionally add carbon source（Such as methyl alcohol, sodium acetate）, industrial park sewage disposed of in its entirety cost It is high.The invention discloses " a kind of whole energy method of industrial park sewage disposal ", for the whole of industrial park sewage disposal Body route is optimized, overall to optimize enterprise's sewage disinfection treatment and garden end sewage treatment process, solves at the sewage of end Reason factory denitrification denitrogenation section carbon resource shortage problem；The process procedure that the energy is extracted from sewage is set, realizes reducing sewage disposal Energy consumption, and energy back feeding wastewater treatment efficiency can be extracted from sewage.
The content of the invention
The invention discloses a kind of whole energy method of industrial park sewage disposal, it is characterised in that by the steps Carry out：
（1）Enterprise's sewage is discharged after pretreatment：The sewage Entry Firm inside sewage treatment facility that enterprise's production is produced is carried out Process, garden sewage treatment plant is entered after process and is uniformly processed.
（2）Coagulation：Sewage initially enters grid, and water float thing is separated, and subsequently enters setting pot, by water In heavy sand class remove from sewage, 1～2min of hydraulic detention time, then sewage enter subsequent reinforced coagulation；
（3）Enhabced primary treatment：Step（2）Water outlet and returned sludge mechanical agitation 10～20min of hybrid reaction, then by heavy 40～the 60min that forms sediment carries out mud-water separation, and supernatant enters subsequent treatment operation, and sludge enters anaerobic sludge digestion and extracts the energy； The returned sludge is referred to：From the sludge that second-level settling pond conveying comes.
（4）High load capacity is biochemical：The supernatant of step (3) enters high load capacity biochemical treatment, itself and second-level settling pond and one-level 30min between the returned sludge hybrid reaction of sedimentation basin, 0.3～0.5d of sludge age, 0.2～0.7mg/L of dissolved oxygen, further by dirt Organic matter in water etc. is transferred in sludge, is separated subsequently into post precipitation；
（5）One-level is precipitated：Step（4）Water outlet flows into this section of precipitate and separate, and 60～90min of sedimentation time, supernatant enters follow-up Multilevel A/O Technology process, sludge 50% is back to high load capacity biochemistry section, and 50% sludge enters anaerobic sludge digestion and extracts the energy；
（6）Multistage AO is biochemical：Step（5）Supernatant enters multistage AO biochemical treatments, and this section of 8～10hr of hydraulic detention time is dirty 15～20d of sludge age, this section by activated sludge for main body biological treatment by organic substance in sewage and nitrogen, phosphorus holophytic nutrition Material is removed to sewage disposal plant effluent qualified discharge concentration substantially, separates subsequently into second-level settling pond.
（7）Two-stage precipitation：Step（6）Water outlet flows into this section of precipitate and separate, and 90～120min of sedimentation time, supernatant is entered Successive depths process, it is biochemical that sludge 70%～50% is back to multistage AO, and 20%～30% is back to enhabced primary treatment section, 10%～ 20% sludge reflux to high load capacity is biochemical, and other excess electron excess fractions enter anaerobic sludge digestion and extract the energy；
（8）Advanced treating：Step（7）Water outlet enters advanced treating part, the organic matter, phosphorus and suspension in further degraded sewage Thing, and after carrying out disinfection qualified discharge to natural water；
（9）Anaerobic sludge digestion：Using A, two sets of sludge anaerobic digestion systems of B system, sludge that enhabced primary treatment is produced and Other sludge are respectively processed；Two sludge treatment systems all adopt mesophilic digestion T=33 ~ 35 DEG C, 20～30d of digestion time, Sewage sludge solid concentration is 8%～12%, and after anaerobic digestion, biogas carries out energy recovery；Supernatant returns to sewage disposal system Front end（That is coagulation）Continue with；The stabilized sludge that A systems are discharged is Jing after dehydration by differentiating to determine disposal options, B The stabilized sludge that system is discharged carries out recycling Jing after dehydration.
Enterprise's sewage of the present invention discharges refer to after pretreatment：Optimization enterprise sewage disinfection treatment, does not set aerobic life Chemical industry skill, is all discharged to degradable organic pollution end sewage treatment plant and is uniformly processed, reduces enterprise's cost of sewage disposal With the investment of sewage treatment facility, while solving garden sewage treatment plant denitrification denitrogenation section carbon resource shortage problem, Yi Jiwei Follow-up sewage extracts the energy and provides good condition.
Setting enhabced primary treatment section of the present invention, this section does not additionally add flocculant, and passes through the two-stage precipitation that flows back Sludge absorption flocculation sewage in organic matter, be beneficial to it is more extract the energy and reduce subsequent treatment process operating load, Chemical sludge is not produced.
The Adsorption of Organic flocculation transfer for being provided with enhabced primary treatment and high load capacity biochemical treatment two-stage of the present invention, More to extract the energy；Subsequent treatment process operating load is reduced simultaneously, reduces subsequent treatment energy consumption.
Two sets of sludge aerobic digestion devices of setting of the present invention effectively can minimize danger waste sludge, give full play to garden The scale and economic benefits of end sewage treatment plant, accomplishes to extract energy back feeding sewage disposal from sewage.Wherein the method master If for processing industrial park sewage disposal of the water yield more than 100,000 ton days.
The present invention further discloses the whole energy method of industrial park sewage disposal and is solving enterprise with garden end Application in terms of the sewage disposal aerobic biochemical process procedure repeated construction of end.The results show：The invention can be by enterprise's sewage Aerobic biochemical technique in process is cancelled, and reduces the investment of enterprise's cost of sewage disposal and sewage treatment facility；Simultaneously enterprise arranges The sewage put is more beneficial for the energy extraction and the operation of Multilevel A/O Technology of garden sewage treatment plant.
More detailed description of the present invention is as follows：
A kind of whole energy method of industrial park sewage disposal, overall technology energy of the method based on industrial park sewage disposal Consumption is minimum, main to consider leading portion enterprise's sewage disinfection treatment and the relation between water quality and end sewage treatment plant handling process, sets up The full-range overall technology power-economizing method of industrial park sewage disposal, and using at the production capacity back feeding of end sewage disposal its sewage Reason, reduces energy resource consumption, reduces industrial park cost of sewage disposal, sets up a kind of overall technology section of industrial park sewage disposal Can method.The method is carried out including the steps：
（1）Enterprise's sewage is discharged after pretreatment：Enterprise's production produces sewage Entry Firm inside sewage treatment facility and processes, its It is important that removing hazardous contaminant, degradable organic pollutant removal is reduced as far as possible, enterprise's sewage treatment facility is not If aerobic biochemical section.After pretreatment, into garden, sewage treatment plant is uniformly processed each enterprise's sewage in garden；
（2）Coagulation：Sewage initially enters grid, and water float thing is separated, and subsequently enters setting pot, will compare in water Great sand class is removed from sewage, 1～2min of hydraulic detention time, subsequently into subsequent technique-enhabced primary treatment.
（3）Enhabced primary treatment：Step（2）Water outlet and returned sludge mechanical agitation 10～20min of hybrid reaction, Ran Houtong Crossing 40～60min of precipitation carries out mud-water separation, and supernatant enters subsequent treatment operation, and sludge enters anaerobic sludge digestion and extracts energy Source；The returned sludge is referred to：From the sludge that second-level settling pond conveying comes.
（4）High load capacity is biochemical：Step（3）Supernatant enter high load capacity biochemical treatment, itself and second-level settling pond and one-level 30min between the returned sludge hybrid reaction of sedimentation basin, 0.3～0.5d of sludge age, 0.2～0.7mg/L of dissolved oxygen, further by dirt Organic matter in water etc. is transferred in sludge, is separated subsequently into post precipitation；
（5）One-level is precipitated：Step（4）Water outlet flow into this section of precipitate and separate, 60～90min of sedimentation time, after supernatant is entered Continuous Multilevel A/O Technology is processed, and sludge 50% is back to high load capacity biochemistry section, and 50% sludge enters anaerobic sludge digestion and extracts the energy.
（6）Multistage AO is biochemical：Step（5）Supernatant enter multistage AO biochemical treatments, this section of hydraulic detention time 8～ 10hr, 15～20d of sludge age, this section is sought the vegetalitas such as organic substance in sewage and nitrogen, phosphorus by activated sludge compound action Foster material is removed to sewage disposal plant effluent qualified discharge concentration substantially, separates subsequently into second-level settling pond.Described activity Sludge refers to " biological floes " of biochemistry pool, and the excess sludge of the desirable municipal sewage plant of sludge of this process section connects Sludge is planted, Jing culture domestications are formed, and this belongs to prior art, referring to Zhang Zijie chief editors, what Chinese architecture publishing house published《Draining Engineering》The operation of 4.10.1 sections active sludge processing system in 4 editions is tamed with the culture of activated sludge.
（7）Two-stage precipitation：Step（6）Water outlet flows into this section of precipitate and separate, and 90～120min of sedimentation time, supernatant is entered Successive depths process, it is biochemical that sludge 50%～70% is back to multistage AO, and 20%～30% is back to enhabced primary treatment section, 10%～ 20% sludge reflux to high load capacity is biochemical, and other excess electron excess fractions enter anaerobic sludge digestion and extract the energy.
（8）Advanced treating：Step（7）Water outlet enters advanced treating part, organic matter further in degraded sewage, phosphorus and Suspension, and after carrying out disinfection qualified discharge to natural water.
（9）Anaerobic sludge digestion：Sludge anaerobic digestion system sets up two sets of A, B systems, the dirt that enhabced primary treatment is produced separately Mud and other sludge are respectively processed.Reason be as contained hazardous contaminant in industrial wastewater, enhabced primary treatment Sludge can be processed Jing after anaerobic digestion as hazardous waste, on the one hand can guarantee that the useless amount of danger is minimized, after on the other hand not affecting Continuous recycling sludge is utilized.Two sludge treatment systems all adopt mesophilic digestion T=33 ~ 35 DEG C, 20～30d of digestion time, sludge Solid concentration is 8%～12%, and after anaerobic digestion, biogas carries out energy recovery；Supernatant returns to sewage disposal system front end （That is coagulation）Continue with；The stabilized sludge that A systems are discharged is Jing after dehydration by differentiating to determine disposal options, B system The stabilized sludge of discharge carries out recycling Jing after dehydration.Described sludge anaerobic digestion system belongs to prior art, referring to Zhang Zijie is edited, what Chinese architecture publishing house published《Drainage system》The anaerobic digestion of 8.3 section sludge in 4 editions.
What a kind of whole energy method of industrial park sewage disposal disclosed by the invention had compared with prior art Good effect is：
（1）Present invention optimization enterprise sewage disinfection treatment（Aerobic biochemical technique is not set）With draining water quality, by degradable organic dirt Dye thing is all discharged to end sewage treatment plant and is uniformly processed, and reduces the investment of enterprise's cost of sewage disposal and sewage treatment facility.It is excellent Change garden sewage disposal technology link, enhabced primary treatment section is set, this section does not additionally add flocculant, and passes through two grades of backflow Organic matter in the sludge absorption flocculation sewage of precipitation, more to extract the energy and reduce subsequent treatment process operating load, Chemical sludge is not produced.
（2）Present invention optimization garden sewage disposal technology link, is provided with enhabced primary treatment and high load capacity biochemical treatment The adsorption-flocculation transfer of two-stage organic matter etc., improves the content of organic matter in sludge, can the more biogas of output；And reduce The organic pollution load for the treatment of facility, advantageously reduces the energy resource consumption of follow-up sewage disposal.
（3）The present invention arranges two sets of sludge aerobic digestion devices, effectively can minimize danger waste sludge, gives full play to garden The scale and economic benefits of end sewage treatment plant, and energy back feeding sewage disposal is extracted from sewage.
（4）Overall technology energy consumption of the present invention based on industrial park sewage disposal is minimum, main to consider leading portion enterprise sewage Pretreatment and the relation between water quality and garden sewage treatment plant handling process, the reservation of carbon source can solve to be taken off in garden sewage disposal The carbon source problem of nitrogen technique, while organic matter can be converted into the energy by garden sewage treatment plant, decreases follow-up sewage disposal Energy resource consumption, reduces industrial park cost of sewage disposal so that industrial park sewage disposal integrally reaches real low-carbon environment-friendly.
Description of the drawings
Accompanying drawing 1 is a kind of schematic flow sheet of the whole energy method of industrial park sewage disposal of the present invention.
Specific embodiment
Below by the specific embodiment narration present invention.Unless stated otherwise, technological means used in the present invention It is method known in those skilled in the art.In addition, embodiment be interpreted as it is illustrative, and it is unrestricted the present invention Scope, the spirit and scope of the invention are limited only by the claims that follow.To those skilled in the art, without departing substantially from this On the premise of invention spirit and scope, various changes that the material component and consumption in these embodiments is carried out or change Belong to protection scope of the present invention.Raw materials used and reagent of the invention is commercially available.
Embodiment 1
（1）Enterprise's sewage is discharged after pretreatment：The sewage Entry Firm inside sewage treatment facility that enterprise's production is produced is processed, It is it is important that removal hazardous contaminant, reduces as far as possible degradable organic pollutant removal, enterprise's sewage treatment facility Aerobic biochemical section is not set.After pretreatment, into garden end, sewage treatment plant is uniformly processed each enterprise's sewage in garden；
（2）Coagulation：The sewage of each enterprise's discharge enters industrial park sewage treatment plant handling process, starts coagulation, That is the physical treatment such as grid, setting pot, hydraulic detention time 2min, to remove sewage in solid in floating, suspended state it is dirty Dye thing, then sewage is into subsequent reinforced coagulation.
（3）Enhabced primary treatment：Step（2）Water outlet and returned sludge mechanical agitation hybrid reaction 15min, then by heavy Shallow lake 60min carries out mud-water separation, and supernatant enters subsequent treatment operation, and sludge enters anaerobic sludge digestion and extracts the energy.
（4）High load capacity is biochemical：The supernatant of step (3) enters into high load capacity biochemical treatment, itself and second-level settling pond and one 30min, sludge age 0.5d, dissolved oxygen 0.5mg/L between the returned sludge hybrid reaction of level sedimentation basin, this section is with physical chemistry work Polluter is removed with for the adsorption function dominated, further organic matter in sewage etc. is transferred in sludge, subsequently into Post precipitation is separated；
（5）One-level is precipitated：High load capacity bio-chemical effluent flows into this section of precipitate and separate, sedimentation time 90min, and supernatant enters follow-up many Level AO PROCESS FOR TREATMENTs, sludge 50% is back to high load capacity biochemistry section, and 50% sludge enters anaerobic sludge digestion and extracts the energy.
（6）Multistage AO is biochemical：Supernatant enters into multistage AO biochemical treatments, this section of hydraulic detention time 10hr, sludge age 15～20d, this section by activated sludge for main body biological treatment by the holophytic nutrition thing such as organic substance in sewage and nitrogen, phosphorus Matter is removed to sewage disposal plant effluent qualified discharge concentration substantially, separates subsequently into second-level settling pond.
（7）Two-stage precipitation：Multistage AO bio-chemical effluents flow into this section of precipitate and separate, and sedimentation time 120min, supernatant is entered Successive depths process, sludge 60% is back to that multistage AO is biochemical, and 25% is back to enhabced primary treatment section, and 15% sludge reflux is paramount Load is biochemical, and other excess electron excess fractions enter anaerobic sludge digestion and extract the energy.
（8）Advanced treating：Two-stage precipitation water outlet enters advanced treating part, further organic matter, the phosphorus in degraded sewage And suspension, and after carrying out disinfection qualified discharge to natural water.
（9）Anaerobic sludge digestion：Sludge anaerobic digestion system sets up two sets of A, B systems, the dirt that enhabced primary treatment is produced separately Mud and follow-up sludge carry out respectively anaerobic sludge digestion.Reason is as contained hazardous contaminant, reinforcing one in industrial wastewater The sludge that level is processed can be processed Jing after anaerobic digestion as hazardous waste, on the one hand can guarantee that the useless amount of danger is minimized, on the other hand Follow-up recycling sludge is not affected to utilize.Two sludge treatment systems all adopt mesophilic digestion T=33 ~ 35 DEG C, digestion time 30d, Sewage sludge solid concentration is 10%, and after anaerobic digestion, biogas carries out energy recovery；Supernatant returns to sewage disposal system front end （That is coagulation）Continue with；The sludge that A systems are discharged is Jing after being stably dehydrated by differentiating to determine disposal options, B system The sludge of discharge carries out recycling Jing after being stably dehydrated.
The comparative test of embodiment 2
Conclusion：
（1）The present invention considers industrial park sewage disposed of in its entirety system, solves enterprise and the aerobic life of garden end sewage disposal Change process procedure repeated construction problem, aerobic biochemical technique is eliminated in enterprise's pre-treating process for sewage, reduce enterprise dirty Water process is invested and cost, while solve garden sewage treatment plant denitrification denitrogenation section carbon resource shortage problem, and for follow-up Sewage extracts the energy and provides good condition.
（2）The present invention is provided with the organic matter of enhabced primary treatment and high load capacity biochemistry section two-stage in garden sewage disposal Deng adsorption-flocculation transfer, be beneficial to and more the energy is extracted from organic matter of sewage, also reduce subsequent treatment process operation bear Lotus, reduces subsequent treatment energy consumption.
（3）The present invention does not add chemical agent, makes full use of absorption and the flocculation of sludge, saves processing cost, Avoid the generation of chemical sludge.
（4）The present invention arranges mesophilic anaerobic digestion system, and the energy is extracted from sludge, and sets up two sets of systems separately, is beneficial to The resource of sludge, reduces the useless amount of danger.

Claims (7)

1. a kind of whole energy method of industrial park sewage disposal, it is characterised in that carry out by the steps：
（1）Enterprise's sewage is discharged after pretreatment：The sewage Entry Firm inside sewage treatment facility that enterprise's production is produced is carried out Process, garden sewage treatment plant is entered after process and is uniformly processed；
（2）Coagulation：I.e. sewage initially enters grid, and water float thing is separated, and subsequently enters setting pot, by water Heavy sand class is removed from sewage, 1～2min of hydraulic detention time, and then sewage enters subsequent reinforced coagulation；
（3）Enhabced primary treatment：Step（2）Water outlet mixes 10～20min with returned sludge, then by precipitating 40～60min Mud-water separation is carried out, supernatant enters subsequent treatment operation, and sludge enters anaerobic sludge digestion and extracts the energy；The returned sludge Refer to the sludge come from second-level settling pond conveying；
（4）High load capacity is biochemical：Step（3）Supernatant enter into high load capacity biochemical treatment, itself and returned sludge hybrid reaction 30min, 0.3～0.5d of sludge age, 0.2～0.7mg/L of dissolved oxygen, are further transferred to the organic matter in sewage in sludge, Separate subsequently into post precipitation；
（5）One-level is precipitated：Step（4）Water outlet flows into this section of precipitate and separate, and 60～90min of sedimentation time, supernatant enters follow-up Multistage AO biochemical process is processed, and sludge 50% is back to high load capacity biochemistry section, and 50% sludge enters anaerobic sludge digestion and extracts the energy；
（6）Multistage AO is biochemical：Step（5）Supernatant enters multistage AO biochemical treatments, and this section of 8～10hr of hydraulic detention time is dirty 15～20d of sludge age, by activated sludge for main body biological treatment by organic substance in sewage and nitrogen, phosphorus holophytic nutrition material Substantially sewage disposal plant effluent qualified discharge concentration is removed to, is separated subsequently into second-level settling pond；
（7）Two-stage precipitation：Step（6）Water outlet flows into this section of precipitate and separate, and 90～120min of sedimentation time, supernatant enters follow-up Advanced treating, sludge 70%～50% is back to that multistage AO is biochemical, and 20%～30% is back to enhabced primary treatment section, and 10%～20% is dirty Mud is back to high load capacity biochemistry, and other excess electron excess fractions enter anaerobic sludge digestion and extract the energy；
（8）Advanced treating：Step（7）Water outlet enters advanced treating part, the organic matter, phosphorus and suspension in further degraded sewage Thing, and after carrying out disinfection qualified discharge to natural water；
（9）Anaerobic sludge digestion：Using two sets of sludge anaerobic digestion systems of A systems and B system, enhabced primary treatment is produced Sludge and other sludge are respectively processed；Mesophilic digestion T=33 ~ 35 DEG C therein, 20～30d of digestion time, control sludge is consolidated 8%～12%, after anaerobic digestion, biogas carries out energy recovery to bulk concentration；Supernatant return to sewage coagulation front end after It is continuous to process；The stabilized sludge that A systems are discharged determines disposal options, the stabilized sludge that B system is discharged Jing after dehydration by differentiating Recycling is carried out Jing after dehydration.
2. the whole energy method described in claim 1, wherein enterprise's sewage discharges refer to after pretreatment：Optimization enterprise is dirty Water pretreatment process, does not set aerobic biochemical technique, degradable organic pollution is discharged into end sewage treatment plant and is uniformly processed, The investment of enterprise's cost of sewage disposal and sewage treatment facility is reduced, while solving garden sewage treatment plant denitrification denitrogenation section Carbon resource shortage problem, and provide good condition for the follow-up sewage extraction energy.
3. the whole energy method described in claim 1, wherein garden sewage treatment plant is provided with enhabced primary treatment section, this section Flocculant is not additionally added, and passes through organic matter in the sludge absorption flocculation sewage of backflow two-stage precipitation etc., be beneficial to more The extraction energy and reduce subsequent treatment process operating load, do not produce chemical sludge.
4. the whole energy method described in claim 1, wherein garden sewage treatment plant are provided with enhabced primary treatment and height is negative The adsorption-flocculations such as the organic matter of lotus biochemical treatment two-stage are shifted, more to extract the energy；Subsequent treatment process fortune is reduced simultaneously Row load, reduces subsequent treatment energy consumption.
5. the whole energy method described in claim 1, wherein garden sewage treatment plant is provided with having for high load capacity biochemical treatment The adsorption-flocculations such as machine thing are shifted, and this partial adsorbates flocculates without flocculant, and pass through flow back one-level precipitation and second-level settling pond Sludge absorption flocculation sewage in organic matter.
6. the whole energy method of the industrial park sewage disposal described in claim 1, wherein the method are primarily directed to process Industrial park sewage disposal of the water yield more than 100,000 ton days.
7. the whole energy method of the industrial park sewage disposal described in claim 1 is being solved at enterprise and garden end sewage Application in terms of reason aerobic biochemical process procedure repeated construction.
CN201611040373.7A 2016-11-24 2016-11-24 Integral energy-saving method for sewage treatment of industrial park Active CN106630388B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201611040373.7A CN106630388B (en) 2016-11-24 2016-11-24 Integral energy-saving method for sewage treatment of industrial park

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CN106630388A true CN106630388A (en) 2017-05-10
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CN110697807A (en) * 2019-09-30 2020-01-17 天津大学 Industrial park negotiation emission reduction feasibility assessment method based on Monte Carlo simulation

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