CN1015888B - Hydrolysis-aerobic biological treatment process for urban sewage - Google Patents
Hydrolysis-aerobic biological treatment process for urban sewageInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000010865 sewage Substances 0.000 title claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 12
- 238000005273 aeration Methods 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000002562 thickening agent Substances 0.000 claims 1
- 230000007062 hydrolysis Effects 0.000 abstract description 10
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000029087 digestion Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
Images
Landscapes
- 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
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.
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)
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 |
-
1986
- 1986-10-13 CN CN 86106883 patent/CN1015888B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CN86106883A (en) | 1988-04-27 |
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Legal Events
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C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C13 | Decision | ||
GR02 | Examined patent application | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |