CN206705905U - A kind of sewage-treatment plant for improving low temperature urban sewage purification effect - Google Patents
A kind of sewage-treatment plant for improving low temperature urban sewage purification effect Download PDFInfo
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- CN206705905U CN206705905U CN201720325622.0U CN201720325622U CN206705905U CN 206705905 U CN206705905 U CN 206705905U CN 201720325622 U CN201720325622 U CN 201720325622U CN 206705905 U CN206705905 U CN 206705905U
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Abstract
A kind of sewage-treatment plant for improving low temperature urban sewage purification effect, belong to water-treatment technology field, its device is formed using grid, setting pot, preliminary sedimentation tank, three sections of ponds, second pond and contact chamber, the bottom of pond portion laying aerator of three sections of pond aerobic sections, control valve is installed between aerator and aeration tube, reflux pump in being set in aerobic section end, collection mud bucket is placed thereon, collection mud bucket is connected with sludge pipe, sludge pipe is lain in a horizontal plane in above the aerator of aerobic section end, and nitrification liquid return duct leads to anoxic section across edge on collection mud bucket.During cold operation, it is identical when sludge concentration is run with normal temperature in anaerobism section, sludge concentration is 2 ~ 4 g/L, sludge concentration control is in 6 ~ 8 g/L in anoxic section, aerobic section, aerobic section water outlet sludge concentration is 2 ~ 4 g/L, closing control valve during operation, reflux pump in unlatching, other modes of operation are same as the prior art.The utility model adds anoxic section and the sludge concentration of aerobic section, realizes high CO_2 density processing low temperature municipal sewage.
Description
Technical field
The utility model belongs to water-treatment technology field, and in particular to a kind of processing method of municipal sewage and is used
Device.
Background technology
At present, the establishing criteria of municipal sewage plant's processing water water quality design is urban wastewater treatment firm pollutant emission
Standard（GB18918-2002）.Municipal sewage plant's biochemical treatment unit majority uses anaerobic- anoxic- oxic activated sludge process
（A2O methods）, the specification of design institute foundation is Code for design of outdoor sewerage engineering（GB50014-2006）With anaerobic- anoxic- oxic activity
Sludge sewage treatment project technical specification（HJ 576-2010）, design aeration tank sludge concentration（MLSS）For 2000mg/L ~
4500mg/L。
Processing unit is by grid, setting pot, preliminary sedimentation tank, three sections of ponds（A2O reaction tanks）, second pond and contact chamber form,
Three sections of ponds therein are by anaerobism section, anoxic section, aerobic section, water inlet pipe, outlet pipe, mud return line, aeration tube, aerator, nitre
Change liquid return duct and interior reflux pump is formed, aerator is laid on the bottom of pond portion of aerobic section, and second pond is connected by mud return line
The anaerobism section in three sections of ponds.Municipal sewage intercepts big suspension and drift by grid；It is dirty subsequently into setting pot, separation
The larger particle of proportion in water；Setting pot water outlet enters preliminary sedimentation tank, removes suspended particulate substance in water removal, mitigates subsequent treatment facility
Load；After preliminary sedimentation tank water outlet enters the anaerobism section in three sections of ponds with returned sludge, enter after anoxic section mixes with backflow nitrification liquid
Aerobic section, mixed liquor carry out biochemical reaction in three sections of ponds, and the mixed liquor after decomposing harmful substances enters back into second pond and sunk
Form sediment, water outlet discharges after being carried out disinfection into contact chamber, the sludge reflux of second pond bottom to the anaerobism section in three sections of ponds, unnecessary sludge
Discharge.
The northern area of China be completed operation with A2O be main body sewage treatment plant when water temperature is relatively low in the winter time it is general very
Difficulty realizes stably reaching standard, and wherein COD, ammonia nitrogen, total nitrogen, total phosphorus are difficult to up to standard.First, activated sludge absorption ability drops with temperature
It is low and weaken, reduced because of the reduction of active sludge microorganism amount and activity with temperature, the metabolic capability of microorganism declines, raw
Change reaction rate to decrease, cause activated sludge absorption hydraulic performance decline；Secondly, temperature reduce can to the granularity of activated sludge,
Density, surface charge have an impact, so as to cause the settling property of activated sludge and dewatering to be deteriorated；In addition, temperature reduces
Microorganism slack-off and flora kind of growing is set to be affected.
Researcher both domestic and external solve the low method of low-temperature wastewater treatment efficiency have increase in engineering sludge reflux amount,
Increase dwell time of sewage takes the measure such as insulation and heating to ensure to reduce sludge loading, some structures be built in interior
Winter sewage disposal standard water discharge.But these measures not only increase construction investment and operating cost, and are found in practice process
Wastewater treatment efficiency remains difficult to ensure, can also often cause sludge bulking problem.Ling You sewage treatment plants are dirty using reaction tank is improved
Mud concentration, the not measure such as spoil disposal reduces sludge loading, but the actual running results show still it cannot be guaranteed that effluent quality meets row
Requirement is put, because the reaction tank mixed liquor of high concentration enters second pond, second pond is designed beyond current design specification
Disposal ability, cause in second pond Sludge Property to be deteriorated, effluent quality more deteriorates.
Utility model content
The technical problems to be solved in the utility model is to provide at a kind of sewage for improving low temperature urban sewage purification effect
Manage device.
The scheme for the technical problem that the utility model solves is using grid, setting pot, preliminary sedimentation tank, three sections of ponds, second ponds
Formed with contact chamber, three sections of ponds therein are by anaerobism section, anoxic section, aerobic section, water inlet pipe, outlet pipe, mud return line, aeration
Pipe, aerator, nitrification liquid return duct and interior reflux pump are formed, and aerator is laid on the bottom of pond portion of aerobic section, aerator and aeration
Control valve is installed, the reflux pump in the setting of aerobic section end places collection mud bucket thereon, and collection mud bucket is the bucket placed vertically between pipe
Shape body, interior reflux pump are enclosed in collection mud bucket, and collection mud bucket is higher than the upper surface of aerobic section sewage, and collection mud bucket is connected with collection mud
Pipe, sludge pipe are lain in a horizontal plane in above the aerator of aerobic section end, and sludge pipe length is the 3% ~ 12% of aerobic section total length, is collected
Through hole is arranged at the bottom of mud tube wall, and nitrification liquid return duct leads to anoxic section across edge on collection mud bucket.
The region of aerobic section end forms sludge settling area, and during cold operation, sludge concentration is run with normal temperature in anaerobism section
Shi Xiangtong, sludge concentration are 2 ~ 4 g/L, in anoxic section, aerobic section sludge concentration control go out sewage sludge in 6 ~ 8 g/L, aerobic section
Concentration is identical when being run with normal temperature, is 2 ~ 4 g/L, the length in aerobic section end sludge settling area for aerobic section total length 3% ~
12%；Closing control valve during operation, reflux pump in unlatching, other modes of operation are same as the prior art.
Its operation principle is after control valve between Aerobic Pond end aerator and aeration tube is closed, and this section forms sludge and sunk
Form sediment, the sludge concentration of bottom is higher, and high concentration sludge is sucked collection mud bucket by interior reflux pump by sludge pipe, then is returned by nitrification liquid
Flow tube is sent to anoxic section, so that anoxic section and aerobic section sludge concentration increase, while flows into the mixed of second pond by outlet pipe
Conjunction liquid concentration is relatively low, and water outlet when can be run with normal temperature is identical.
By controlling the pond length for stopping aerobic section and being aerated, anoxic section and aerobic section sludge concentration can be controlled.Closing control
The quantity of valve is more, then the length in aerobic section end sludge settling area is longer, and sludgd deposition amount is more, so as to be returned by nitrification liquid
It is higher that flow tube is sent to anoxic section sludge concentration.
When equipment normal temperature is run, collection mud bucket and sludge pipe are dismantled and remove three sections of ponds, open control valve, equipment recovers general
Logical running status.
The advantages of the utility model：
1st, during northern sewage treatment plant's winter operation, valve on standpipe is aerated by closing aerobic section end segment and stops exposing
Gas, sludge settling area is become, and settling zone bottom nitrification liquid is back to anoxic section, with backflow nitre during non-winter operation
It is to substantially increase to change liquid concentration to compare, therefore adds anoxic section and the sludge concentration of aerobic section, forms high concentration activity
Sludge handles low temperature municipal sewage.
2nd, low temperature urban sewage treatment system improves biomass, compensate for temperature drop by increasing activated sludge concentration
It is low, activity of activated sludge weaken the shortcomings that.
3rd, increase activated sludge concentration, make to reduce into water organic loading, under the conditions of effectively prevent low temperature high organic loading
Sludge bulking and sludge stickiness causes greatly muddy water mixed solution to be difficult to separate, water outlet is muddy phenomenon produce, solve low temperature city
The problem of sewage activated sludge settling property and dewatering difference.
4th, aerobic section end is transformed into sludge settling area, before the nitrification liquid of a part of high sludge concentration is back to anoxic section
End, the mud mixed liquid concentration of second pond is lowered into, ensures sedimentation basin mud-water separation effect under cryogenic conditions, keep aerobic section
Interior activated sludge is in the state of high concentration underload, the efficient removal of organic matter when realizing low temperature.
5th, aerobic section end is transformed into sludge settling area, and anaerobism section is added equivalent in pond end, can be carried out in end
Denitrification denitrogenation reacts, and improves the efficiency of municipal sewage denitrogenation.
Brief description of the drawings
Fig. 1 is the utility model schematic diagram；
Fig. 2 is three sections of pond schematic diagrames.
Embodiment
The utility model device is formed using grid 1, setting pot 2,3, three sections of ponds 4 of preliminary sedimentation tank, second pond 5 and contact chamber 6,
Three sections of ponds 4 therein are by anaerobism section 7, anoxic section 8, aerobic section 9, water inlet pipe 10, outlet pipe 11, mud return line 12, aeration tube
13rd, aerator 14, nitrification liquid return duct 15 and interior reflux pump 16 are formed, and aerator 14 is laid on the bottom of pond portion of aerobic section 9, aeration
Control valve 17 is installed between device 14 and aeration tube 13, the reflux pump 16 in the setting of the end of aerobic section 9, places collection mud bucket 18 thereon,
Collection mud 18 barrel to place vertically of bucket, interior reflux pump 16 are enclosed in collection mud bucket 18, and collection mud bucket 18 is dirty higher than aerobic section 9
The upper surface of water, collection mud bucket 18 are connected with sludge pipe 19, and sludge pipe 19 is lain in a horizontal plane in above the aerator of the end of aerobic section 9
At 15cm, through hole is arranged at the bottom of the tube wall of sludge pipe 19, and nitrification liquid return duct 15 leads to anoxic section 8 across edge on collection mud bucket 18, good
The length in the end sludge settling area of oxygen section 9 is the 10% of the total length of aerobic section 9.
Claims (1)
- A kind of 1. sewage-treatment plant for improving low temperature urban sewage purification effect, it is characterised in that：Using grid, setting pot, Preliminary sedimentation tank, three sections of ponds, second pond and contact chamber are formed, three sections of ponds therein by anaerobism section, anoxic section, aerobic section, water inlet pipe, go out Water pipe, mud return line, aeration tube, aerator, nitrification liquid return duct and interior reflux pump are formed, and aerator is laid on aerobic section Bottom of pond portion, installs control valve between aerator and aeration tube, the reflux pump in the setting of aerobic section end, place collection mud bucket thereon, Collection mud bucket is the barrel placed vertically, and interior reflux pump is enclosed in collection mud bucket, and collection mud bucket is higher than the upper table of aerobic section sewage Face, collection mud bucket are connected with sludge pipe, and sludge pipe is lain in a horizontal plane in above the aerator of aerobic section end, and sludge pipe length is aerobic Through hole is arranged at the 3% ~ 12% of section total length, the bottom of sludge pipe tube wall, and nitrification liquid return duct leads to anoxic section across edge on collection mud bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720325622.0U CN206705905U (en) | 2017-03-30 | 2017-03-30 | A kind of sewage-treatment plant for improving low temperature urban sewage purification effect |
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| CN201720325622.0U CN206705905U (en) | 2017-03-30 | 2017-03-30 | A kind of sewage-treatment plant for improving low temperature urban sewage purification effect |
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| CN206705905U true CN206705905U (en) | 2017-12-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865906A (en) * | 2017-03-30 | 2017-06-20 | 东北师范大学 | A kind of sewage-treatment plant and operating method for improving low temperature urban sewage purification effect |
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2017
- 2017-03-30 CN CN201720325622.0U patent/CN206705905U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865906A (en) * | 2017-03-30 | 2017-06-20 | 东北师范大学 | A kind of sewage-treatment plant and operating method for improving low temperature urban sewage purification effect |
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