CN1015888B - Hydrolysis-aerobic biological treatment process for urban sewage - Google Patents

Hydrolysis-aerobic biological treatment process for urban sewage

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Publication number
CN1015888B
CN1015888B CN 86106883 CN86106883A CN1015888B CN 1015888 B CN1015888 B CN 1015888B CN 86106883 CN86106883 CN 86106883 CN 86106883 A CN86106883 A CN 86106883A CN 1015888 B CN1015888 B CN 1015888B
Authority
CN
China
Prior art keywords
sludge
hydrolysis
sewage
urban sewage
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CN 86106883
Other languages
Chinese (zh)
Other versions
CN86106883A (en
Inventor
郑元景
王凯军
刘玫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Municipal Research Institute of Environmental Protection
Original Assignee
Beijing Municipal Research Institute of Environmental Protection
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Municipal Research Institute of Environmental Protection filed Critical Beijing Municipal Research Institute of Environmental Protection
Priority to CN 86106883 priority Critical patent/CN1015888B/en
Publication of CN86106883A publication Critical patent/CN86106883A/en
Publication of CN1015888B publication Critical patent/CN1015888B/en
Expired legal-status Critical Current

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  • Activated Sludge Processes (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a novel process for treating urban sewage, which is suitable for popularization and application in urban sewage plants and comprises a grit chamber, a hydraulic screen, a hydrolysis reactor, an aeration tank, a sedimentation tank, a sludge concentration tank and the like. The sludge is treated while the sewage is treated, and the sludge amount is greatly reduced. Realizes the simultaneous treatment of sewage and sludge. The process can save capital investment, power consumption and daily operation cost.

Description

Hydrolyzing-oxybiotic treatment of nunicipal drainage
The present invention relates to a kind of novel process of municipal sewage treatment.The method of existing municipal sewage treatment generally adopts the technical process of second-stage treatment, promptly removes suspended substance through precipitation process earlier, relies on the organism in the aerobic bacteria decomposition municipal effluent then, reaches the purpose of purification.The mud that treating processes is discharged carries out anaerobically fermenting with digester and handles, and this flow process exists following problem: the initial cost that at first is treatment facility is big; Next is a treating processes energy consumption height, has caused the operational and administrative expenses height, has influenced extensively carrying out of municipal sewage treatment.
Task of the present invention provides that a kind of initial cost is few, energy consumption is low, working cost is few, the simple treatment process of operational administrative.
Task of the present invention is to implement like this, has replaced the single-minded traditional preliminary sedimentation tank of function with multifunctional hydrolyzed reactor, uses the reaction of hydrolysis and acid-producing bacteria, and insoluble hydrolysis of organic matter is become dissolved organic matter; Macromolecular substance resolves into small-molecule substance, has improved the biodegradability of sewage greatly, because the generation of hydrolysis and partial acidification effect makes that sewage sludge obtains handling simultaneously, can cancel sludge digestion tank.
Fig. 1 is a municipal effluent hydrolysis-aerobic biological treatment process schematic flow sheet.
Below in conjunction with accompanying drawing 1, technical process of the present invention is described in further detail:
Former municipal effluent enters settling pit (1) by pump, residence time 3-5 minute, oarse-grained sand grains is removed, pass through hydraulic screen (2) then, 3 millimeters of the kerf spacings of hydraulic screen, the large particulate matter that removal is swum, sewage enter hydrolysis reactor (3), and hydrolysis reactor adopts specially designed, any packing material is not installed in the reactor, do not establish agitator and triphase separator, in reactor (3) after the short period of time stops, BOD 5(BOD5) clearance can reach 30~40%; The COD(chemical oxygen demand (COD)) clearance reaches 40~60%; The SS(suspended substance) clearance can reach 80~90%, the percent hydrolysis of mud in reactor is 36~65%, water outlet after hydrolysis reactor is handled enters aeration tank (4), head end need add the filler that accounts for pool volume about 20%, to obtain the active sludge of good sedimentation function.Sewage shortened than traditional technology greatly in the aeration tank residence time, and gas-water ratio reduces significantly, and the water after handle the aeration tank enters settling tank (5), settling tank water outlet BOD 5<20 mg/litre, COD<100 mg/litre, SS<20 mg/litre.The water outlet of settling tank (5) can be discharged.The mud that is settled out at settling tank (5) passes back into aeration tank (4) by sludge pump by pipeline, excess sludge is sent into hydrolysis reactor (3), and the excess sludge of whole flow process is discharged from hydrolysis reactor, and sludge quantity greatly reduces, and stable in properties, do not need digestion process.Mud enters concentration basin (6), directly dehydration after concentrating in 12~24 hours.

Claims (4)

1, a kind of urban sewage treatment process of being made up of sedimentation basin, hydraulic screen, aeration tank and settling tank is characterized in that sealing in the aeration tank in the whole flow process.
2, by claim 1 predetermined process technology, it is characterized in that the head end of aeration tank adds the filler that accounts for pool volume 20%.
3, by claim 1 or 2 predetermined process technologies, it is characterized in that the mud in the settling tank is sent into the aeration tank reuse.
4, by claim 3 predetermined process technology, it is characterized in that excess sludge can directly enter sludge thickener, concentrate directly dehydration of back.
CN 86106883 1986-10-13 1986-10-13 Hydrolysis-aerobic biological treatment process for urban sewage Expired CN1015888B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 86106883 CN1015888B (en) 1986-10-13 1986-10-13 Hydrolysis-aerobic biological treatment process for urban sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 86106883 CN1015888B (en) 1986-10-13 1986-10-13 Hydrolysis-aerobic biological treatment process for urban sewage

Publications (2)

Publication Number Publication Date
CN86106883A CN86106883A (en) 1988-04-27
CN1015888B true CN1015888B (en) 1992-03-18

Family

ID=4803402

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 86106883 Expired CN1015888B (en) 1986-10-13 1986-10-13 Hydrolysis-aerobic biological treatment process for urban sewage

Country Status (1)

Country Link
CN (1) CN1015888B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100418903C (en) * 2004-08-07 2008-09-17 安徽建筑工业学院 Tech. for treating urban sewage by complete mixed hydrolytic acidify

Also Published As

Publication number Publication date
CN86106883A (en) 1988-04-27

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