CN106186292A - A kind of method of active sludge treatment waste water - Google Patents

A kind of method of active sludge treatment waste water Download PDF

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Publication number
CN106186292A
CN106186292A CN201610661464.6A CN201610661464A CN106186292A CN 106186292 A CN106186292 A CN 106186292A CN 201610661464 A CN201610661464 A CN 201610661464A CN 106186292 A CN106186292 A CN 106186292A
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China
Prior art keywords
waste water
active sludge
sedimentation
sludge
activated sludge
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CN201610661464.6A
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Chinese (zh)
Inventor
孟祥娣
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Individual
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Priority to CN201610661464.6A priority Critical patent/CN106186292A/en
Publication of CN106186292A publication Critical patent/CN106186292A/en
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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
    • 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
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • 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
    • 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
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention proposes a kind of method of active sludge treatment waste water, comprises the steps: that the first waste water is sufficiently mixed in the first Aeration tank with activated sludge, oxidative metabolism；Mixed liquor after above-mentioned process enters second pond and staticly settles, and upper strata purified water runs in and puts, and an activated sludge part is back to Aeration tank, and another part collects and for processing the second waste water；After process completes, collect the solid matter in sedimentation tank, landfill disposal after dehydration, concentration.The method of active sludge treatment waste water that the present invention proposes, decapacitation is dealt carefully with and is effectively utilized in sedimentation tank outside sewage sludge solid, more can improve waste water treatment efficiency, be lifting and the optimization of existing technique on the basis of saving process costs.

Description

A kind of method of active sludge treatment waste water
Technical field
The present invention relates to sewage treatment area, particularly to a kind of method of active sludge treatment waste water.
Background technology
It is one of serious environmental problems of currently facing of China that water pollutes.China's waste water annual emissions one since 1985 Directly maintain 35,000,000,000 400 hundred million m3Left and right.In these waste water of discharge, the sanitary wastewater of only 10% and the industrial wastewater of 70% Being processed, and the water outlet that wherein there are about half Industrial Wastewater Treatment facility does not reaches discharging standards, remaining is untreated Waste water is then directly discharged in rivers and lakes, causes the water environment of China to be subject to severe contamination and destruction；Urban life waste water Discharge capacity also with city-building and development in incremental trend, though taking substantial amounts of control measure in recent years, but water body The trend deteriorated further is still continuing.
At present, process sanitary wastewater, the most widely used method of industrial wastewater is activated sludge process.It is to utilize activity dirty Mud (the microorganism flco of suspension growth) processes a class aerobic biological process for treating of waste water.Basic procedure is by Aeration tank, secondary Sedimentation tank, aerating system (pressurized equipment containing air or oxygen, tubing and air-diffuser) and sludge reflux system System composition.Original waste water and activated sludge (containing the activated sludge of backflow bottom second pond) mix at Aeration tank, in waste water can Dissolubility organic pollution is adsorbed by activated sludge, and is decomposed by micropopulation, and waste water is purified.In second pond, live Property mud separate with the waste water being cleaned, process water discharge, activated sludge concentrates in mud district, and with higher concentration backflow Aeration tank.Along with activated sludge constantly increases, partial sludge is discharged from system as excess sludge.
After waste water has processed, in sedimentation tank, process and the excess sludge of sewage sludge solid have the most effectively utilized into people pass The problem of note.
Summary of the invention
In place of the deficiencies in the prior art, the present invention proposes a kind of method of active sludge treatment waste water, except energy is appropriate In conducting oneself well reason and effectively utilizing sedimentation tank outside sewage sludge solid, more can improve waste water and process effect on the basis of saving process costs Rate.
The present invention proposes a kind of method of active sludge treatment waste water, comprises the steps:
S10, the first waste water through primary sedimentation pond, preliminary sedimentation, filter off after insoluble bulky grain pollutant with activated sludge Simultaneously enter in the first Aeration tank and be sufficiently mixed, in mixed liquor, be passed through enough dissolved oxygen, stir and make activated sludge be in Suspended state, keeps 6 24 hours；
S30, is transferred to standing sedimentation upper strata clarification after 24 hours in secondary sedimentation tank by the mixed liquor that step S10 processes Water is directly discharged in environment, and activated sludge is deposited in mud district and is divided into returnedactivatedsludge and residual active sludge two Point；Described returnedactivatedsludge is back to Aeration tank, and described residual active sludge collects and for processing the second waste water.
S50, after waste water has processed, collects the solid matter in primary sedimentation pond, secondary sedimentation tank, through dehydration, concentrates Landfill disposal after process.
Preferably, described residual active sludge processes the second waste water and comprises the steps:
S31, makes residual active sludge and the second waste water enter in the second Aeration tank and is sufficiently mixed, stir and make residual activity Mud is in suspended state, keeps 46 minutes；
S32, the mixed liquor after step S31 being processed is transferred in three sedimentation tanks, adds coagulant, and residual activity is dirty Mud, pollutant, coagulant form coalescence bacterial pollutant and settle down, and after 24 hours, sewage is merged into the first waste water In, solid removal at the bottom of pond, landfill disposal after dehydration.
Preferably, one during described coagulant is aluminium chlorohydrate, dimethylamine epichlorohydrin, PAMC or Several.
Preferably, described first Wastewater Pollutant content is less than 1% or 5000ppm；Described second Wastewater Pollutant content More than 3% or 20,000ppm.
The method of the active sludge treatment waste water that the present invention proposes, can remove that dissolve and biodegradable from waste water Organic substance and can simultaneously be avoided the repeatedly transfer of pollutant by the suspended solid of activated sludge absorption and some other material, It it is a kind of efficient, method of wastewater treatment of safe and nontoxic evil.What is more important, in sedimentation tank, sewage sludge solid is filled Process or be sown on soil as fertilizer, or compost, it is allowed to obtain more appropriate process, it is to avoid to environment. Meanwhile, the activated sludge in second pond, in addition to part is as returnedactivatedsludge, excess sludge the most directly abandons, but uses Process the waste water that higher concentration pollutes, on the basis of saving process costs, activated sludge is made full use of, effectively Improve waste water treatment efficiency.Therefore, the present invention propose method be the lifting to existing active sludge treatment waster water process and Optimize.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention Scope.
The present invention proposes a kind of method of active sludge treatment waste water, and it comprises the steps:
S10, the first waste water through primary sedimentation pond, preliminary sedimentation, filter off after insoluble bulky grain pollutant with activated sludge Simultaneously enter in the first Aeration tank and be sufficiently mixed, in mixed liquor, be passed through enough dissolved oxygen, stir and make activated sludge be in Suspended state, keeps 6 24 hours；
S30, is transferred to standing sedimentation upper strata clarification after 24 hours in secondary sedimentation tank by the mixed liquor that step S10 processes Water is directly discharged in environment, and activated sludge is deposited in mud district and is divided into returnedactivatedsludge and residual active sludge two Point；Described returnedactivatedsludge is back to Aeration tank, and described residual active sludge collects and for processing the second waste water.
S50, after waste water has processed, collects the solid matter in primary sedimentation pond, secondary sedimentation tank, through dehydration, concentrates Landfill disposal after process.
Specifically, in the present embodiment, the first waste water and the second waste water are all from sanitary wastewater, industrial wastewater, food processing Waste water, pharmacy waste water and/or solid pollutant.The solubility such as fatty, sugared, starch, protein and analog is degradable organic Thing.Difference is, the first Wastewater Pollutant content is less than 1% or 5000ppm；Second Wastewater Pollutant content is more than 3% or 20, 000ppm, it includes at least about 10, the Biochemical oxygen demand (BOD) of 000ppm or at least about 7, the COD of 500ppm (COD) (COD).Preferably, described second waste water includes at least 1000ppm total suspended solid (TSS) or 1000ppm Fat, oil and fat (FOG).
In step S10, the first waste water and activated sludge are fully contacted in Aeration tank, form suspended mixed liquor.Due to dirt Mud specific surface area is very big (between 2 000 10000m2/m3), and surface contains polysaccharide cement layer, therefore can be comparatively short In time (3 5min), the organic pollution materials (BOD) in waste water is adsorbed and is adhered, (actual after being passed through enough dissolved oxygen In operation, the concentration of dissolved oxygen is not less than 2mg/L), aerobic microbiological in activated sludge (antibacterial, fungus, protozoacide, after Lively thing) under aerobic state, the solubility in sewage, larger molecular organics are degraded and be oxidized to cellularity and middle product Thing, the simultaneously breeding of this micropopulation.This stage often carries out the slowest, and on the one hand a part of Organic substance is closed by microorganism Become the new cellular material that self is required, carry out anabolism；On the one hand another part Organic substance is carried out catabolism, i.e. oxygen Change and decompose to obtain the energy synthesized needed for new cell, and ultimately form CO2And H2The stable materials such as O.
Wherein, antibacterial bulb separation bacterium, bacillus, vibrio three class.In addition to general antibacterial, also include some more high antibacterials, as Actinomycetes, filamentous bacteria.Common fungus such as yeast, mycete etc..Protozoacide such as sarcodina class, flagellat, Infusoria Deng.Metazoa mainly has wheel animalcule, nematicide etc..
It should be noted that in absorption phase, activated sludge absorption reach saturated after can lose activity, no longer there is absorption Ability.And by oxidation stage, after eliminating adsorbed large amount of organic, mud occurs activity again, recovers its suction Attached oxidative decomposition capacity.Therefore activated sludge can repeat, recycle.
In step S30, in secondary settling tank, activated sludge, the pollutant of digestion are separated from water by gravity.Pass through After the sedimentation of 24 hours, the water in sedimentation tank is the clarification water quality being purified, can be directly discharged to environment (i.e. lake, river or Common process plant) in.Activated sludge is owing to action of gravity is deposited at the bottom of pond and constantly piles up growth.A part of activated sludge Being back to Aeration tank and continue digestion pollutant, another part collects as residual active sludge, for processing the second waste water.
In step S50, after sewage disposal completes, collect primary sedimentation pond, secondary sedimentation tank and residual active sludge and process Solid matter after second waste water, landfill disposal after dehydration, concentration.Dehydration can by use belt press, centrifuge and Decantation occurs.Solid matter can be delivered to fill factory by landfill, it is possible to is sown on soil as fertilizer, or compost.
Further, residual active sludge processes the second waste water and comprises the steps:
S31, makes residual active sludge and the second waste water enter in the second Aeration tank and is sufficiently mixed, stir and make residual activity Mud is in suspended state, keeps 46 minutes；
S32, the mixed liquor after step S31 being processed is transferred in three sedimentation tanks, adds coagulant, and residual activity is dirty Mud, pollutant, flocculant form coalescence bacterial pollutant and settle down, and after 24 hours, sewage is merged into the first waste water In, solid removal at the bottom of pond, landfill disposal after dehydration.
In this step, 46 minutes for the microorganism making the pollutant in the second waste water be adsorbed onto in residual active sludge Surface and there is not oxidative metabolism effect.
Preferably, coagulant coagulant described in step S32 is aluminium chlorohydrate, dimethylamine epichlorohydrin, cation poly-third One or more in acrylamide, in order to by contaminants together.
Application examples:
Use the inventive method to process sanitary sewage at certain city one, compare by prior art processing method, sampling inspection Survey, result such as following table:
From data, using the inventive method Treating Municipal Sewage, its effluent quality is good, and all reaches country-level Discharge standard, effect is substantially better than art methods.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (4)

1. the method for an active sludge treatment waste water, it is characterised in that comprise the steps:
S10, the first waste water through primary sedimentation pond, preliminary sedimentation, filters off after insoluble bulky grain pollutant with activated sludge simultaneously Enter in the first Aeration tank and be sufficiently mixed, in mixed liquor, be passed through enough dissolved oxygen, stir and make activated sludge be in suspension State, keeps 6 24 hours；
S30, after the mixed liquor that step S10 processes is transferred in secondary sedimentation tank standing sedimentation 24 hours, upper strata primary water Being directly discharged in environment, activated sludge is deposited in mud district and is divided into returnedactivatedsludge and residual active sludge two Point；Described returnedactivatedsludge is back to the first Aeration tank, and described residual active sludge collects and gives up for processing second Water；
S50, after waste water has processed, collects the solid matter in primary sedimentation pond, secondary sedimentation tank, fills out after dehydration, concentration Bury process.
2. the method for active sludge treatment waste water as claimed in claim 1, it is characterised in that described residual active sludge processes Second waste water comprises the steps:
S31, makes residual active sludge and the second waste water enter in the second Aeration tank and is sufficiently mixed, stir and make residual active sludge It is in suspended state, keeps 46 minutes；
S32, the mixed liquor after step S31 being processed is transferred in three sedimentation tanks, adds coagulant, residual active sludge, dirt Dye thing, coagulant form coalescence bacterial pollutant and settle down, and after 24 hours, sewage is merged in the first waste water, pond End solid matter removes, landfill disposal after dehydration.
3. the method for active sludge treatment waste water as claimed in claim 2, it is characterised in that described coagulant is chloride hydrate One or more in aluminum, dimethylamine epichlorohydrin, PAMC.
4. the method for active sludge treatment waste water as claimed in claim 1, it is characterised in that described first Wastewater Pollutant contains Amount is less than 1% or 5000ppm；Described second Wastewater Pollutant content is more than 3% or 20,000ppm.
CN201610661464.6A 2016-08-08 2016-08-08 A kind of method of active sludge treatment waste water Withdrawn CN106186292A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110981079A (en) * 2019-11-26 2020-04-10 浙江永续环境工程有限公司 Sewage treatment process applying microbial carrier
CN114249504A (en) * 2021-12-31 2022-03-29 连云港东江水务有限公司 Activated sludge process for reducing excess sludge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781006A (en) * 2010-03-03 2010-07-21 天津科技大学 New method for improving flocculation treatment effect of high yield pulp waste liquid by using surplus sludge
CN102718358A (en) * 2012-06-08 2012-10-10 郑州梦溪环保科技有限公司 Sewage treatment method
CN102939267A (en) * 2010-05-28 2013-02-20 艺康美国股份有限公司 Improvement of activated sludge process in wastewater treatment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781006A (en) * 2010-03-03 2010-07-21 天津科技大学 New method for improving flocculation treatment effect of high yield pulp waste liquid by using surplus sludge
CN102939267A (en) * 2010-05-28 2013-02-20 艺康美国股份有限公司 Improvement of activated sludge process in wastewater treatment
CN105502642A (en) * 2010-05-28 2016-04-20 艺康美国股份有限公司 Improved activated sludge process in wastewater treatment
CN102718358A (en) * 2012-06-08 2012-10-10 郑州梦溪环保科技有限公司 Sewage treatment method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110981079A (en) * 2019-11-26 2020-04-10 浙江永续环境工程有限公司 Sewage treatment process applying microbial carrier
CN110981079B (en) * 2019-11-26 2022-04-22 浙江永续环境工程有限公司 Sewage treatment process applying microbial carrier
CN114249504A (en) * 2021-12-31 2022-03-29 连云港东江水务有限公司 Activated sludge process for reducing excess sludge

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