CN101823791A - Underground oxidation ditch sewage treatment system - Google Patents
Underground oxidation ditch sewage treatment system Download PDFInfo
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- CN101823791A CN101823791A CN200910127722A CN200910127722A CN101823791A CN 101823791 A CN101823791 A CN 101823791A CN 200910127722 A CN200910127722 A CN 200910127722A CN 200910127722 A CN200910127722 A CN 200910127722A CN 101823791 A CN101823791 A CN 101823791A
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- oxidation ditch
- sewage
- underground
- ditch
- oxidation
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- 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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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an underground oxidation ditch sewage treatment system relating to a new oxidation ditch sewage treatment system which can be used for treating sewage in factory areas suffered from organic pollution in new districts in cities and small towns. An underground oxidation ditch consists of an underground annular closed ditch buried in a block or a factory area; sewage enters a three-grid septic tank with a grizzly screen and a sand setting function through a building drain system and then is connected to the oxidation ditch through a drain branch pipe; and water inlet points are distributed along the whole length of the underground oxidation ditch, so that water can enter from a plurality of points. The pretreated sewage in the factory area can be connected to the underground oxidation ditch. The sewage flows in the ditch in a gravity form; conduit type aerators are arranged at a certain interval, so that double functions of aerating to oxygenate and lifting sewage can be achieved, further, the sewage is used for cultivating active sludge microorganism, and the circulating flow can be realized. Water drained from the oxidation ditch enters a drain tank and is lifted to a secondary sedimentation tank through a sewage pump; and reflow sludge from the secondary sedimentation tank is reflowed to the oxidation ditch through a gravity pipeline.
Description
One, technical field
Patent of the present invention relates to a kind of new oxidation channel wastewater treatment system, can be used for Urban New District, small-sized cities and towns, based on the sewage disposal of the plant area of factory of organic contamination, also can be used for the situation that the municipal wastewater closed conduit transform underground oxidation channel wastewater treatment system as.
Two, background technology
Oxidation ditch process is a kind of important dirty water living creature processing technique, is used widely in municipal sewage treatment and industrial organic waste water processing.The oxidation ditch process of Application and Development has card Losail oxidation ditch, opel oxidation ditch, three slot type oxidation ditches, ship shape oxidation ditch, integral type oxidation ditch etc. successively both at home and abroad.
Present oxidation ditch system remains in deficiency in the following aspects:
1. the development of biological carbon and phosphorous removal technology is the main impellent of oxidation ditch system development.So far, oxidation ditch system mostly is activated sludge process, have certain denitrogenation ability, but phosphor-removing effect has much room for improvement.
2. improving circulating equipment of oxidation channel performance and monitoring technique is the further Research on Saving Energy direction of oxidation Ditch Technology.
3. improve cold-resistant, the resistance to poison energy of oxidation ditch, reduce floor space and construction costs and be still one of research direction of oxidation ditch.
Based on above background, a kind of new oxidation ditch operational mode---underground oxidation ditch is proposed.
Three, summary of the invention
1, technical scheme
Underground oxidation ditch is improved on construction features and operation scheme the conventional oxidation ditch, and the subterranean ring seal irrigation canals and ditches in plant area, urban cells or small towns form by imbedding, and also can be formed by the arterial drainage transformation.Both having can be used as the processing structures, is again draining trunk canal (seeing accompanying drawing) simultaneously.To town domestic sewage, sewage is introduced into the three-grid septic tank with grid and sand setting function through architectural drainage system, after branch drain inserts oxidation ditch, water entry can be arranged multipoint water feeding along underground oxidation ditch total length.To plant area's sewage, can will insert underground oxidation ditch through pretreated sewage.Establish the catheter type aerator at a certain distance at oxidation ditch and carry out aeration aerating.Oxidation ditch effluent adopting overflow weir enters drainage tray, is promoted to second pond through sump pump again, and the second pond returned sluge is back to oxidation ditch through gravity pipe line.
Compare with other common oxidation ditches, the underground oxidation ditch useful volume is bigger, and suspended sediment concentration and organic loading are lower, and sludge age and hydraulic detention time are long, have strengthened the denitrogenation dephosphorizing function; Sludge output is few, has only second pond to have excess sludge to produce; The pre-treatment facility is a septic tank, regularly removes.Simultaneously,, save to take up an area of, reduced pollution, and can keep higher temperature in the winter time because that this system is embedded in is underground.
2, oxidation ditch structure and design
The underground oxidation ditch main channel is embedded in the block or plant area is underground, feeds sewage by branch drain around it, and the irrigation canals and ditches form of fracture adopts chamfering rectangle or trapezoidal.According to flow velocity in the channel is 0.6～1m/s design section specification.Need before the water inlet to remove big suspended substance and particulate matter by pre-treatment, sanitary sewage can adopt three format manure pits to realize, as far as possible in the anaerobic zone water inlet, to satisfy the required carbon source of denitrification.
Sewage run by gravity form in irrigation canals and ditches flows, and a catheter type aerator is installed at a certain distance, realizes the lifting of sewage when realizing aeration aerating, flows at sealing irrigation canals and ditches internal recycle to guarantee sewage.
Engineering design:
The aerobic zone volume:
In the formula: Y is the sludge yield coefficient, gets 04～0.6kg (SS)/kg (BOD
5);
θ
cBe sludge age, got 15～25 days;
Q enters sewage day of underground oxidation ditch flow when maximum, m
3/ s;
S
a, S
eBe respectively into water and water outlet BOD, mg/L;
X is an oxidation ditch inner suspension sludge concentration, desirable 2000～4000mg/L;
K
dFor mud autoxidation speed, get 0.05.
The oxygen-starved area volume:
In the formula: N
a, N
eBe respectively into water and water outlet ammonia nitrogen concentration, mg/L;
U
DnBe the oxygen-starved area digestion rate, its representative value is 0.02～0.06g (N)/gSS.d;
The total useful volume of oxidation ditch: V=V
1+ V
2
Oxidation ditch area of section: A=V/L.L is the oxidation ditch total length in the formula, rationally determines according to block or plant area's scope.
The circular flow of sewage in oxidation ditch: q=Av, wherein v is a flow velocity, gets 0.6～1.0m/s.Select catheter type aerator model specification according to circular flow q.
Four, description of drawings
Accompanying drawing 1 is the underground oxidation ditch floor map.
Accompanying drawing 2 is underground oxidation ditch catheter type aerator mounting vertical plane figure.
Accompanying drawing 3 is samll cities and towns' underground oxidation ditch sewage treatment system plot plan among the embodiment.Dotted portion is a underground oxidation ditch among the figure, and concrete the construction according to ground built.
Five, embodiment
Sewage enters in buried oxidation ditch by arm after the pre-treatment in block septic tank or plant area workshop, the conduit aerator aeration that underground oxidation ditch passes through to be provided with every a segment distance is to the sewage oxygenation, turn out cotton-shaped active sludge, the organic pollutant in the sewage is purified by the active sludge microorganism degraded.The catheter type aerator can arrive certain elevation by lifting sewage simultaneously, realizes that sewage run by gravity in a closed ring area under control flows.In circulating, realize the degraded and the denitrogenation dephosphorizing of organic matter of sewage, the sewage and the active sludge that are cleaned enter drainage tray through overflow weir, rise to ground second pond by lift pump, realize the separation of muddy water, primary water realizes that through sterilization process qualified discharge is to natural water body again, mud part run by gravity returns oxidation ditch and refluxes, and a part realizes ultimate disposal or recycling through sludge treatment technique.
1: one samll cities and towns of embodiment, population 20,000, physical features is smooth, and the block squarely is taken up an area of about 2.3km
2, build the underground oxidation ditch sewage treatment process along arterial street.Sanitary sewage amount 3000m
3/ d, industrial sewage 4000m
3/ d.Underground oxidation ditch is arranged to annular along main street, and total length is 5600m, flow area 0.4m
2, total useful volume 2240m
3About 8 hours of hydraulic detention time.Establish two air blast machine rooms in the block, 4 corners install 4 catheter type aerators altogether at annular oxidation ditch, and sewage is carried out aeration aerating.Establish overflow port at an aerobic zone place, the lift pump room pond is gone in the mixed solution overflow, be promoted on the ground and do subsequent disposal in the small-scale sewage treatment station, and part second pond mud run by gravity is back to the backflow of oxidation ditch realization mud.
2: one new school districts of university of embodiment, population 30,000 takes up an area of about 2km
2, build the underground oxidation ditch sewage treatment process along main roads in the campus.Sanitary sewage amount 2000m
3/ d.Underground oxidation ditch is arranged to annular, and total length is 3600m, flow area 0.3m
2, total useful volume 1080m
3About 12 hours of hydraulic detention time.Establish two air blast machine rooms in the block, 4 corners install 4 catheter type aerators altogether at annular oxidation ditch, and sewage is carried out aeration aerating, and gas-water ratio is 10: 1.Establish overflow port at an aerobic zone place, the lift pump room pond is gone in the mixed solution overflow, be promoted in the small-scale sewage treatment station and do subsequent disposal, can realize qualified discharge.
New planning district, 3: one cities of embodiment, planning population 50,000, physical features is smooth, and the block becomes sub-circular, takes up an area of about 4km
2, build the underground oxidation ditch sewage treatment process along arterial street.Sanitary sewage amount 6000m
3/ d, industrial sewage 10000m
3/ d.Underground oxidation ditch is arranged to annular along main street, and total length is 8000m, flow area 0.8m
2, total useful volume 6400m
3Hydraulic detention time 9.6 hours.Establish four air blast machine rooms in the block, 8 catheter type aerators are installed altogether, sewage is carried out aeration aerating in 4 corners of annular oxidation ditch and centre.Establish overflow port at an aerobic zone place, the lift pump room pond is gone in the mixed solution overflow, be promoted in the small-scale sewage treatment station and do subsequent disposal, can realize qualified discharge.
Claims (4)
1. new oxidation ditch sewage disposal operational mode, its principal character is that oxidation ditch is formed by the irrigation canals and ditches that descend circlewise that are embedded in block or plant area, sewage is purified through biochemical treatment in oxidation ditch.
2. underground oxidation ditch according to claim 1 is characterized in that: the interior sewage of underground oxidation ditch is run by gravity and circulates, and the catheter type aerator is installed by corner, realizes the dual function that aeration and oxygenation for sewage and elevation promote.
3. underground oxidation ditch according to claim 1 is characterized in that: the oxidation ditch water inlet needs before entering to remove big suspended substance and particulate matter through three-grid septic tank or workshop pre-treatment by being distributed in its peripheral branch drain branch water inlet.
4. underground oxidation ditch according to claim 1, it is characterized in that: mixed solution enters the lift pump room pond through place's aerobic zone overflow port in the oxidation ditch, be promoted on the ground in the sewage works, connect second pond and enter subsequent disposal, second pond mud part run by gravity is back to oxidation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910127722A CN101823791A (en) | 2009-03-18 | 2009-03-18 | Underground oxidation ditch sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910127722A CN101823791A (en) | 2009-03-18 | 2009-03-18 | Underground oxidation ditch sewage treatment system |
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| CN101823791A true CN101823791A (en) | 2010-09-08 |
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ID=42687991
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271511A (en) * | 2015-11-20 | 2016-01-27 | 山东华腾环保科技有限公司 | Decentralized sewage treatment device and installation method thereof |
| CN104703927B (en) * | 2012-10-22 | 2018-01-09 | 伊沃夸水处理技术有限责任公司 | Waste water outflow system and method |
| CN109987702A (en) * | 2019-03-18 | 2019-07-09 | 沈阳建筑大学 | A kind of process of synchronous denitrification dephosphorizing oxidation ditch and its strengthened denitrification |
| CN114716123A (en) * | 2022-03-21 | 2022-07-08 | 凌志环保股份有限公司 | Household purification tank and oxidation ditch combined rural sewage treatment multi-circulation system |
-
2009
- 2009-03-18 CN CN200910127722A patent/CN101823791A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703927B (en) * | 2012-10-22 | 2018-01-09 | 伊沃夸水处理技术有限责任公司 | Waste water outflow system and method |
| US10106446B2 (en) | 2012-10-22 | 2018-10-23 | Evoqua Water Technologies Llc | Wastewater overflow systems and methods |
| CN105271511A (en) * | 2015-11-20 | 2016-01-27 | 山东华腾环保科技有限公司 | Decentralized sewage treatment device and installation method thereof |
| CN109987702A (en) * | 2019-03-18 | 2019-07-09 | 沈阳建筑大学 | A kind of process of synchronous denitrification dephosphorizing oxidation ditch and its strengthened denitrification |
| CN109987702B (en) * | 2019-03-18 | 2022-01-11 | 沈阳建筑大学 | Synchronous nitrogen and phosphorus removal oxidation ditch and enhanced nitrogen removal process method thereof |
| CN114716123A (en) * | 2022-03-21 | 2022-07-08 | 凌志环保股份有限公司 | Household purification tank and oxidation ditch combined rural sewage treatment multi-circulation system |
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Open date: 20100908 |