CN101591061A - The pretreated oxidation channel wastewater treatment system of simple aeration - Google Patents
The pretreated oxidation channel wastewater treatment system of simple aeration Download PDFInfo
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- CN101591061A CN101591061A CNA2008101129315A CN200810112931A CN101591061A CN 101591061 A CN101591061 A CN 101591061A CN A2008101129315 A CNA2008101129315 A CN A2008101129315A CN 200810112931 A CN200810112931 A CN 200810112931A CN 101591061 A CN101591061 A CN 101591061A
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- aeration
- oxidation
- treatment system
- wastewater treatment
- oxidation ditch
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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
Abstract
The present invention relates to the pretreated oxidation channel wastewater treatment system of a kind of simple aeration, comprise the aeration water collecting basin that connects successively, settling tank and oxidation ditch, described aeration water collecting basin bottom is provided with the aerating apparatus of inflation in the pond, the in-out end of described oxidation ditch is provided with high-position overflow trough, the supernatant water outlet conduit of described settling tank inserts described high-position overflow trough by sump pump, the overflow port of described high-position overflow trough is positioned at described oxidation ditch feed-water end top, be provided with some parallel traverse baffles in the described oxidation ditch, with space segmentation in the ditch is the parallel irrigation canals and ditches that some head and the tail connect, some aeration rotary brushs are set in the irrigation canals and ditches at interval, its aerobic zone mainly is oxidation and nitration reaction, and its oxygen-starved area mainly is hydrolysis and anti-nitration reaction.Aeration of the present invention is effective, can eliminate organic contamination, and has certain denitrification dephosphorization function, mainly is adapted to sanitary sewage and other similar organic sewages.
Description
Technical field
The present invention relates to a kind of Sewage treatment systems, particularly a kind of Sewage treatment systems based on oxidation ditch arriving higher degree of purification, and realizes to a certain degree desquamation denitrogenation belonging to field of environment protection.
Background technology
The mankind use precipitation, filtration process as centralized water treatment plant the earliest from Englishman in 1804, the American had invented coagulation, precipitation, filtration, chlorine disinfectant technology in 1884, use the history in existing 120 years till today, though the mankind constantly have new discovery and raising aspect clean water treatment, but the treatment process of domestic water but remains unchanged basically, does not upgrade in essence and breaks through.Yet very big variation has but taken place at the water source of process object: the water source before century-old is because industrial, agriculture undeveloped, and water body is not contaminated.And in decades, development of modern industry, especially chemical engineering industry happen suddenly, industrial wastewater discharge, the loss of agrochemical, agricultural chemicals, the pollution of sanitary sewage etc., serious day by day to the contaminated degree of source water, make the traditional water treatment process be difficult to guarantee fine water.
Based on consideration to cost and expense, mainly utilize various biochemical processs and the combination thereof of microorganism is a kind of prefered method of handling organic polluting water always, different according to water oxygen content and micropopulation that brings thus and reaction mechanism, can roughly be divided into anaerobic process, aerobic method and marginal anoxic method, generally speaking, anaerobic process is adapted to the organic sewage of high density, mainly be that larger molecular organics is decomposed into small organic molecule, therefore also need further processing, and aerobic rule is adapted to the concentration low organic sewage of friendship relatively, by microorganism the oxidation operation in the water is decomposed into inorganics, so the water outlet degree of purification is higher.
Oxidation ditch has another name called continuous circulation, is a kind of distortion of activated sludge process.Oxidation ditch sewage treatment technology the 1950's by the success of Dutch sanitary engineering Research Institute, since 1954 since the coming into operation first of Holland.Because technical characterstics such as good, stable, the convenient managements of its effluent quality, be widely used in the improvement of sanitary sewage and industrial sewage at home and abroad.The early oxidation ditch is a single raceway groove " circulation ", is mainly used in to remove the BOD in the sewage and carry out nitration reaction, has now formed various type, comprises Carrousel type, opel type, two ditches or three ditch alternation types, integrated oxidation ditch or the like.Because the oxygen level DO periodical change of sewage in the oxidation ditch, experience by aerobic to anoxic again to aerobic continuous change procedure, and the current residence time is long, and sludge age is long enough to keep the nitrifier of sufficient amount, can carry out nitrated at aerobic zone, carry out denitrification in the oxygen-starved area, play denitrogenation thus, simultaneously, Gu the phosphorus bacterium also can remain under the finite concentration, absorb the phosphorus in the sewage, finally form mud and from water, remove.But the concentration of wastewater that oxidation ditch adapts to is relatively low, does not fit into the purification of higher concentration sewage.
Summary of the invention
For overcoming the above-mentioned defective of prior art, the invention provides the pretreated oxidation channel wastewater treatment system of a kind of simple aeration, the preaeration effect of this system, cost is low, good purification, and have denitrogenation dephosphorizing effect preferably.
Technical scheme of the present invention is: the pretreated oxidation channel wastewater treatment system of a kind of simple aeration, comprise the grid that connects successively, the aeration water collecting basin, settling tank and oxidation ditch, described aeration water collecting basin bottom is provided with the aerating apparatus of inflation in the pond, the in-out end of described oxidation ditch is provided with high-position overflow trough, the supernatant water outlet conduit of described settling tank inserts described high-position overflow trough by sump pump, the overflow port of described high-position overflow trough is positioned at described oxidation ditch feed-water end top, the described oxidation ditch water surface that is higher than is more than 500 millimeters, its overflow weir is the weir of level, and extension width is smaller or equal to the oxidation ditch feed-water end width that is positioned at its below.
Owing to before sewage enters oxidation ditch, be provided with grid, screened out the oversize material that influences subsequent disposal in the sewage, owing in water collecting basin, increased aerating apparatus, form the aeration water collecting basin, aeration and aerobic biochemical treatment when catchmenting, have just been carried out, reduced pollutants in sewage content, and the sludge settling that helps the post precipitation pond, effectively the mud in the sewage is separated, space and equipment have also been saved simultaneously, avoided the process of catchmenting the phenomenon of fermentation and peculiar smell to occur, safeguarded surrounding environment, owing on oxidation ditch, be provided with high-position overflow trough, do not needing to increase under the situation of sump pump power and pressure head, just water can be squeezed into the high-position overflow trough that is positioned at eminence, sewage from high-position overflow trough the mode by overflow to dirty, formation is similar to the current of waterfall, fully contact with ambient air, make in the airborne oxygen dissolving entry, when current fall into the oxidation ditch water surface, form impact especially to the water surface, drive in the air admission water, and also contact with air by the water that splashes, realized aeration to a certain extent thus to sewage, the running environment and the decontamination effect improving of oxidation ditch have been improved, reduced the appearance of floating mud and peculiar smell, improved decontamination effect improving, long aerobic and anoxic checker through oxidation ditch, realized higher organic sewage of concentration and the nitrogen in the sewage, the decomposition of phosphorus or removal reach the purpose of sewage purification.In addition, this system architecture is simple, and is easy to operate, do not increase cost on the basis of existing technology basically, and high-position overflow trough wherein can also be as a view by suitable moulding.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention;
Fig. 2 is the plan structure synoptic diagram that the present invention relates to oxidation ditch.
Embodiment
Referring to Fig. 1, the invention provides the pretreated oxidation channel wastewater treatment system of a kind of simple aeration, comprise the grid 14 that connects successively, aeration water collecting basin 1, settling tank 2 and oxidation ditch 6, described aeration water collecting basin bottom is provided with the aerating apparatus 13 of inflation in the pond, the in-out end of described oxidation ditch is provided with high-position overflow trough 5, supernatant water rising pipe 3 roads of described settling tank insert described high-position overflow trough by sump pump 4, the overflow port of described high-position overflow trough is positioned at described oxidation ditch feed-water end top, the described oxidation ditch water surface that is higher than is more than 500 millimeters, its overflow weir is the weir of level, and extension width is smaller or equal to the oxidation ditch feed-water end width that is positioned at its below.
Sewage earlier enters the aeration tank of catchmenting through grid, will catchment and primary sedimentation integrates, and overall structure that can simplified apparatus is reduced investment outlay.
The catchment ingress of aeration tank of described grid being provided with.
Described grid preferred mechanical grid is provided with the tailover outlet, so that the oversize material in the water is separated the back otherwise processed, avoids the obstruction to subsequent technique.
Described aerating apparatus can be the aeration head that connects the high-pressure air feed pipeline.Can adopt the mode of interval type work to carry out aeration, both passed through certain aeration after, stop period of aeration, carrying out aeration, can reduce the consumption of source of the gas like this, reduce cost.
Through the aeration in the water collecting basin, can improve the oxygen level that enters settling tank and oxidation ditch sewage, avoid the peculiar smell that causes because of hypoxgia in water collecting basin itself and the follow-up equipment and to the negative impact of purification of water quality, improve the biodegradability of sewage, and avoid improving the precipitable property of mud because the suspended sludge that anaerobic reaction causes occurs in the water collecting basin.
Can also realize the homogenizing of sewage by aeration, stablize follow-up load.
Described settling tank bottom is inversed taper platform shape, and the bottom is provided with sludge outlet, and is connected with sludge pump, the mud discharging pipe connection sludge sump of described sludge pump.
After the mud of described settling tank is squeezed into sludge thickener and is concentrated by the sludge pump that is provided with in settling tank bottom, row processing again.
The water outlet of described settling tank is provided with overflow weir, adopts the water outlet of overflow mode, and water outlet enters the supernatant water pipeline through overflow weir, enters described oxidation ditch again.
Described high-position overflow trough should be higher than the oxidation ditch water surface more than 500 millimeters, and is preferred more than 1500 millimeters, and overflow weir is the weir of level, and extension width is smaller or equal to the oxidation ditch feed-water end width that is positioned at its below.Overflow water forms waterfall shape, with the effective contact with air, produces when falling into the oxidation ditch water surface simultaneously and impacts and bubble, further improves the dissolution degree of air and oxygen.
Be provided with some parallel traverse baffles 7 in the described oxidation ditch, with space segmentation in the ditch is the parallel irrigation canals and ditches that some head and the tail connect, these irrigation canals and ditches have constituted the water stream channel of oxidation ditch, in the parallel irrigation canals and ditches that head and the tail connect, some aeration rotary brushs 8 are set at interval, so that carry out aeration, sewage obtains dissolved oxygen at each aeration rotary brush place thus, forms aerobic zone, after certain aerobic biochemical reaction, dissolved oxygen in the water reduces gradually, form the oxygen-starved area, the different microorganisms group is arranged respectively, carry out different biochemical reactions at aerobic zone and oxygen-starved area, wherein aerobic zone mainly is oxidation and nitration reaction, and the oxygen-starved area mainly is hydrolysis and anti-nitration reaction.
The oxidation ditch back is connected with second pond 9 and retention basin 10 in turn, described second pond bottom is the inversed taper platform shape, the bottom is provided with the mud discharging mouth, be connected with the second pond sludge pump, the mud discharging pipeline 11 of described second pond sludge pump is divided into two-way, and one the tunnel is connected in sludge sump 12, forms mud discharging, one the tunnel is connected in the feed-water end of oxidation ditch, forms mud and refluxes.The discharge stream that can regulate mud by the valve on the mud discharging pipeline to the backflow ratio.
Owing in pre-treatment, increased aeration, can significantly improve the hydraulic surface loading that oxidation ditch is disposed of sewage, improve the efficient of oxidation ditch itself, water flow mode is reasonable, also help to reduce floor space, improve treatment effect, for sanitary sewage and other similar combined sewages, through reaching emission standard after the native system processing.
Claims (10)
1. pretreated oxidation channel wastewater treatment system of simple aeration, it is characterized in that comprising the aeration water collecting basin that connects successively, settling tank and oxidation ditch, described aeration water collecting basin bottom is provided with the aerating apparatus of inflation in the pond, the in-out end of described oxidation ditch is provided with high-position overflow trough, the supernatant water outlet conduit of described settling tank inserts described high-position overflow trough by sump pump, the overflow port of described high-position overflow trough is positioned at described oxidation ditch feed-water end top, the described oxidation ditch water surface that is higher than is more than 500 millimeters, its overflow weir is the weir of level, and extension width is smaller or equal to the oxidation ditch feed-water end width that is positioned at its below.
2. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 1 is characterized in that the ingress of the described aeration tank of catchmenting is provided with grid.
3. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 2 is characterized in that described grid preferred mechanical grid, is provided with the tailover outlet
4. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 1 is characterized in that described settling tank bottom is inversed taper platform shape, and the bottom is provided with sludge outlet.
5. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 4 is characterized in that the sludge outlet of described settling tank is connected with sludge pump, the mud discharging pipe connection sludge sump of described sludge pump.
6. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 5 is characterized in that the water outlet of described settling tank is provided with overflow weir
7. as claim 1,2,3,4, the pretreated oxidation channel wastewater treatment system of 5 or 6 described simple aerations, it is characterized in that being provided with in the described oxidation ditch some parallel traverse baffles, with space segmentation in the ditch is the parallel irrigation canals and ditches that some head and the tail connect, in the parallel irrigation canals and ditches that these connect from beginning to end, some aeration rotary brushs are set at interval.
8. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 7 is characterized in that described oxidation ditch back is connected with second pond in turn.
9. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 7 is characterized in that described second pond back connects retention basin.
10. the pretreated oxidation channel wastewater treatment system of simple aeration as claimed in claim 9, it is characterized in that described second pond bottom is the inversed taper platform shape, the bottom is provided with the mud discharging mouth, be connected with the second pond sludge pump, the mud discharging pipeline of described second pond sludge pump is divided into two-way, one the tunnel is connected in sludge sump, and one the tunnel is connected in the feed-water end of oxidation ditch.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101129315A CN101591061A (en) | 2008-05-26 | 2008-05-26 | The pretreated oxidation channel wastewater treatment system of simple aeration |
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| CNA2008101129315A CN101591061A (en) | 2008-05-26 | 2008-05-26 | The pretreated oxidation channel wastewater treatment system of simple aeration |
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| CN101591061A true CN101591061A (en) | 2009-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529089A (en) * | 2015-01-06 | 2015-04-22 | 常州大学 | Small purifying system for heavily-polluted river |
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2008
- 2008-05-26 CN CNA2008101129315A patent/CN101591061A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529089A (en) * | 2015-01-06 | 2015-04-22 | 常州大学 | Small purifying system for heavily-polluted river |
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Open date: 20091202 |