CN101215044A - Multistage circulation composite sewage treatment method - Google Patents
Multistage circulation composite sewage treatment method Download PDFInfo
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- CN101215044A CN101215044A CNA200710060186XA CN200710060186A CN101215044A CN 101215044 A CN101215044 A CN 101215044A CN A200710060186X A CNA200710060186X A CN A200710060186XA CN 200710060186 A CN200710060186 A CN 200710060186A CN 101215044 A CN101215044 A CN 101215044A
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- floating stuffing
- aeration tank
- district
- adds
- sewage treatment
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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 invention discloses a multi-stage combined-cycle sewage treatment method, which is adaptable to two-stage plug-flow urban sewage treatment plants. An aeration tank of the two-stage plug-flow urban sewage treatment plant is divided into an anoxic zone and an adding zone of suspension filling material, wherein the anoxic zone is arranged at the rear end of the aeration tank and communicated with a water inlet of the aeration tank and the adding zone of suspension filling material is arranged behind the anoxic zone. The adding zone of suspension filling material is divided into a plurality of processing units, each processing unit comprises two galleries, each gallery is internally equipped with a diving propeller, each processing unit is internally provided with a baffle wall, two ends of the baffle wall and two side walls of the aeration tank are provided with openings, and under the propelling of the diving propeller, suspension filling material and mixed liquor placed in the adding zone of suspension filling material circulate and flow along the galleries. The invention enables the sewage entering the adding zone of suspension filling material to realize multi-stage multi-time circulatory flow in the adding zone of suspension filling material, thereby increasing the effect of sewage treatment.
Description
[technical field]
The present invention relates to the dirty water living creature processing technique field, especially a kind of multistage circulation composite sewage treatment method that is applicable to secondary pulling flow type municipal sewage plant.
[background technology]
China adopts activated sludge process two stage biological treatment process in the municipal sewage plant mostly at present, activated sludge process compare with other technology have the investment and working cost low, system is simple relatively, adaptability is strong, stable characteristics, but continuous strictness along with sewage drainage standard, to nitrogen in the sewage, the emission request of nutritive substances such as phosphorus is higher, and in order to reach good nitrification effect, just must increase the pond holds to reduce organic loading, traditional sewage treatment process with denitrogenation dephosphorizing function often needs a plurality of anaerobic and aerobic reaction tank series connection, form the reaction of high order pond, by increasing the purpose that internal recycle reaches denitrogenation dephosphorizing, this certainly will will increase the expense and the energy consumption of initial cost, and make operational management comparatively complicated, cause transformation or enlarging task that sewage work of the cities of secondary grade all is faced with increases the denitrogenation dephosphorizing function, this difficulty for the municipal sewage plant of many soils anxiety is bigger.In addition, the sludge concentration of conventional activated sludge process is the highest can only to be reached about 4g/L, and the unit biomass is lower than technologies such as biomembrance process, therefore how to improve the sludge concentration of mixed solution, increase the microbe population of unit volume, the volume that reduces reaction tank is a direction of research always.
For many years, many countries are all actively attempting exploitation combines biomembrance process with activated sludge process treatment process, utilize the biomembrance process microbe density big, the characteristic that generation cycle is long, temperature influence is little, technology in conjunction with activated sludge process is easy, stable, adaptable advantage not only can improve the water quality of water outlet but also can reduce occupation of land.Adding floating stuffing in biological reaction tank can combine microbial film and activated sludge process effectively, brings into play the strong point of the two, forms good complementing each other.But, being subjected to condition restriction such as state of the art and construction costs and running maintenance, the at present domestic industrial sewage that is mainly used in is handled, and it is less that municipal wastewater is handled utilization.
[summary of the invention]
The object of the invention is intended to for overcoming the deficiencies in the prior art, multistage circulation composite sewage treatment method is proposed, this treatment process is applicable to secondary pulling flow type municipal sewage plant, be intended to keep under the constant situation of original municipal sewage plant aeration tank skeleton construction as far as possible, improve sewage treating efficiency and treatment effect.
The present invention has proposed a kind of multistage circulation composite sewage treatment method for achieving the above object, is applicable to secondary pulling flow type municipal sewage plant, and the aeration tank of this municipal sewage plant is divided into the oxygen-starved area and floating stuffing adds the district.Described oxygen-starved area (not filled) is positioned at the aeration tank front end and communicates with the aeration tank water-in, and raw waste water, internal recycle mixed solution and active sludge hybrid concurrency are given birth to denitrification in the oxygen-starved area, and the settling property of active sludge improves simultaneously; Described floating stuffing adds the district and is positioned at after the oxygen-starved area, this floating stuffing adds the floating stuffing of the nitrifier that is placed with the surface enrichment that is used to dispose of sewage in the district, described floating stuffing adds zoning and is divided into several processing units, each processing unit comprises two gallerys, be provided with underwater scooter in each gallery, and be provided with partition wall in each processing unit, the both sides pool wall of the two ends of described partition wall and aeration tank is formed with opening, thereby under the promotion of underwater scooter, being placed on floating stuffing and the mixed solution that floating stuffing adds the district circulates along gallery, enter sewage that floating stuffing adds the district and in floating stuffing adds the district, pass through and multistagely repeatedly circulate, improved the effect of sewage disposal.
Beneficial effect of the present invention is: the secondary plug-flow aeration tank is divided into the oxygen-starved area in the present invention and floating stuffing adds the district, floating stuffing add the total biomass that can increase the aeration tank, do not changing the aeration tank structure, do not increase under the situation of pond appearance, improved the nitrated ability of system and the ability of anti-shock loading.Floating stuffing adds the district and is made of several processing units, in each gallery of processing unit underwater scooter is set.Under the promotion of underwater scooter, floating stuffing and mixed solution flow at each processing unit internal recycle, have prolonged the residence time of the nitrifier of floating stuffing institute enrichment in the aeration tank greatly.And enter sewage that floating stuffing adds the district through behind several processing units, and in adding the district, realized floating stuffing multistagely repeatedly circulating, improved the effect of sewage disposal greatly.
[description of drawings]
Fig. 1 is a multistage circulation composite sewage treatment method synoptic diagram of the present invention.
[embodiment]
Below in conjunction with the drawings and specific embodiments technical solutions according to the invention are described in detail.
Please refer to shown in Figure 1ly, multistage circulation composite sewage treatment method of the present invention is applicable to secondary pulling flow type municipal sewage plant, and the aeration tank of this municipal sewage plant is divided into oxygen-starved area 1 and floating stuffing adds district 2.Oxygen-starved area 1 is positioned at the aeration tank front end, and the oxygen-starved area volume is decided according to denitrification design needs; Floating stuffing adds district 2 and is positioned at after the oxygen-starved area 1, and this floating stuffing adds in the district 2 and is placed with the floating stuffing that is used to dispose of sewage.
In an embodiment of the present invention, floating stuffing adds the district and 2 is divided into several processing units, and number of processing units can be decided according to the technology actual needs, is example with two processing units in diagram 1 of the present invention.Each processing unit comprises two gallerys, and the direction along current in each gallery is provided with underwater scooter 4.The installation site of underwater scooter 4 and quantity are decided according to the technology actual needs, and in diagram 1 of the present invention, it is example that a underwater scooter 4 is set in each gallery with processing unit.The floating stuffing of aeration tank adds in district's processing unit of 2 and is provided with vertical partition wall 3, form opening between the both sides pool wall of the two ends of this partition wall 3 and aeration tank, thereby under the promotion of underwater scooter 4, floating stuffing and mixed solution forms along the gallery direction circulating fluidized.
In an embodiment of the present invention, 1 enters floating stuffing and adds 2 water inlet, district screen cloth 5 is installed from the oxygen-starved area, and the pore size of screen cloth 5 is decided according to the physical dimension of floating stuffing.The water outlet place that floating stuffing adds each processing unit in district 2 is equipped with overflow weir 6, and the outside surface of overflow weir 6 is coated with screen cloth 5.
In an embodiment of the present invention, water-in and water outlet that floating stuffing adds each processing unit in the district 2 are provided with training wall 7 near the aeration tank side-walls, guarantee that floating stuffing and mixed solution circulate, and reduce the dead angle.In an embodiment of the present invention, the chamfering of this training wall 7 is 45 degree or fillets, so is not limited to this, and chamfering also can be other any angles.
Biological method for treating waste water of the present invention is specific as follows:
The sewage that the aeration tank water-in flows into is the oxygen-starved area 1 through communicating with the aeration tank water-in earlier, adds district's 2 water-in screen clothes through floating stuffing again and enters floating stuffing and add district 2.
The sewage that the inflow floating stuffing adds district 2 forms circulating fluidized with floating stuffing under the promotion of underwater scooter 4.Floating stuffing adds the loss that the overflow weir of the water outlet place of district's each processing unit of 2 installing that is coated with screen cloth 56 can prevent filler, under the promotion of underwater scooter 4, floating stuffing constantly circulates in filler adds the district, thereby the nitrifier of the surface enrichment of floating stuffing was prolonged greatly in the residence time of aeration tank, help fully carrying out of nitration reaction.The inflow floating stuffing adds the sewage in district 2 through after a plurality of processing unit processes, has realized that sewage adds district's 2 multistage multiple cycles at floating stuffing, has improved the effect of sewage disposal greatly.
The process floating stuffing adds the sewage of district's 2 processing and the mixed solution of active sludge flows into the terminal gallery that communicates with water outlet in aeration tanks through overflow weir 6, presses the nitrate recirculation ratio of setting above-mentioned mixed-liquor return is arrived the anoxic pond denitrification denitrogenation.The aeration tank goes out water mixed liquid and enters coagulation basin, dosing coagulant in the coagulation basin, and the kind and the consumption of coagulating agent are decided according to arts demand.Coagulation basin goes out water mixed liquid and enters second pond, carries out mud-water separation at second pond, and part mud is back to anoxic pond, and excess sludge is discharged.
Because the present invention adds district's processing unit water outlet of 2 at floating stuffing and is provided with overflow weir 6, can make filler be retained in floating stuffing and add in the district 2 and do not participate in mud and reflux, ensure the residence time of the nitrifier of floating stuffing institute enrichment in the aeration tank.
It is worth noting, the secondary plug-flow aeration tank is divided into oxygen-starved area 1 in the present invention and floating stuffing adds district 2, in floating stuffing adds district's each processing unit of 2, adopt with the partition wall 3 of both ends open and be provided with the mode of underwater scooter 4 at each gallery of processing unit, floating stuffing and mixed solution are circulated along gallery in each processing unit, prolonged the residence time of nitrifier greatly, improved the effect of sewage disposal in the aeration tank.
The present invention also adds district's processing unit water outlet of 2 at floating stuffing and is provided with the overflow weir 6 that is coated with screen cloth 5, can prevent the loss of mixed solution floating stuffing when the processing unit internal recycle flows of floating stuffing and sewage, further ensure the residence time of nitrifier in the aeration tank.In addition, the present invention is provided with training wall 7 at water-in and the water outlet that floating stuffing adds each processing unit in the district 2 near the aeration tank side-walls, guarantees that floating stuffing and mixed solution circulate, and reduce the dead angle, the effect of many-sided common raising sewage disposal.
In an embodiment of the present invention, handle ammonia nitrogen, total nitrogen, total phosphorus, the BOD of back water outlet
5, six indexs of COD, SS can reach national grade one discharge standard.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. multistage circulation composite sewage treatment method, be applicable to secondary pulling flow type municipal sewage plant, this secondary pulling flow type municipal sewage plant is provided with the aeration tank, it is characterized in that: described aeration tank is divided into the oxygen-starved area and floating stuffing adds the district, described oxygen-starved area is positioned at the aeration tank front end and communicates with the aeration tank water-in, described floating stuffing adds the district and is positioned at after the oxygen-starved area, this floating stuffing adds the floating stuffing that is placed with the surface enrichment nitrifier that is used to dispose of sewage in the district, described floating stuffing adds zoning and is divided into several processing units, each processing unit comprises two gallerys, be provided with underwater scooter in each gallery, and be provided with partition wall in each processing unit, the both sides pool wall of the two ends of described partition wall and aeration tank is formed with opening, under the promotion of underwater scooter, being placed on floating stuffing and the mixed solution that floating stuffing adds the district circulates along gallery
Described multistage circulation composite sewage treatment method comprises that sewage enters floating stuffing through the oxygen-starved area that communicates with the aeration tank water-in and adds the district, the sewage that the inflow floating stuffing adds the district forms the multi-stage circulating-flow attitude with floating stuffing under the promotion of underwater scooter.
2. multistage circulation composite sewage treatment method according to claim 1 is characterized in that: the water outlet place that described floating stuffing adds each processing unit in district is equipped with overflow weir, and the outside surface of overflow weir is coated with screen cloth.
3. multistage circulation composite sewage treatment method according to claim 1 is characterized in that: enter the water inlet that floating stuffing adds the district from described oxygen-starved area screen cloth is installed.
4. multistage circulation composite sewage treatment method according to claim 1 is characterized in that: water-in and water outlet that described floating stuffing adds each processing unit in the district are provided with training wall near the aeration tank side-walls.
5. multistage circulation composite sewage treatment method according to claim 5 is characterized in that: the chamfering of described training wall is 45 degree or fillets.
6. according to the described multistage circulation composite sewage treatment method of above claim, the mixed solution that adds the sewage handled in the district and active sludge through described floating stuffing is back to the oxygen-starved area by the nitrate recirculation ratio of setting and carries out denitrification denitrogenation.
7. according to the described multistage circulation composite sewage treatment method of above claim, coagulation basin is established in back, described aeration tank, the aeration tank goes out water mixed liquid and enters coagulation basin, described coagulation basin goes out water mixed liquid and enters second pond, carry out mud-water separation at second pond, part mud is back to described anoxic pond, and excess sludge is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710060186XA CN101215044A (en) | 2007-12-26 | 2007-12-26 | Multistage circulation composite sewage treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710060186XA CN101215044A (en) | 2007-12-26 | 2007-12-26 | Multistage circulation composite sewage treatment method |
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| CN101215044A true CN101215044A (en) | 2008-07-09 |
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| CNA200710060186XA Pending CN101215044A (en) | 2007-12-26 | 2007-12-26 | Multistage circulation composite sewage treatment method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408130A (en) * | 2013-07-29 | 2013-11-27 | 绍兴水处理发展有限公司 | Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method |
| CN103991960B (en) * | 2014-05-27 | 2015-11-18 | 青岛思普润水处理股份有限公司 | A kind of microbial film and active sludge compound sewage treatment system |
| CN105399214A (en) * | 2015-12-15 | 2016-03-16 | 桑德集团有限公司 | A/O-embedded nitrobacteria carrier combined-application biological treatment system |
| CN106865771A (en) * | 2017-03-31 | 2017-06-20 | 长春工程学院 | The device and method of the vertical double-cycle process Treating Municipal Sewage of pulling flow type |
| CN111170472A (en) * | 2020-01-17 | 2020-05-19 | 上海同瑞环保科技有限公司 | Method for purifying river channel by using gallery propagation bacteria |
| CN113788532A (en) * | 2021-09-27 | 2021-12-14 | 肇庆市鹏凯环保装备有限公司 | Water treatment circulating equipment and treatment method |
-
2007
- 2007-12-26 CN CNA200710060186XA patent/CN101215044A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408130A (en) * | 2013-07-29 | 2013-11-27 | 绍兴水处理发展有限公司 | Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method |
| CN103408130B (en) * | 2013-07-29 | 2015-01-07 | 绍兴水处理发展有限公司 | Aeration tank for reducing ammonia nitrogen content in sewage according to ammonia nitrogen biological degradation technology, and treating method |
| CN103991960B (en) * | 2014-05-27 | 2015-11-18 | 青岛思普润水处理股份有限公司 | A kind of microbial film and active sludge compound sewage treatment system |
| CN105399214A (en) * | 2015-12-15 | 2016-03-16 | 桑德集团有限公司 | A/O-embedded nitrobacteria carrier combined-application biological treatment system |
| CN106865771A (en) * | 2017-03-31 | 2017-06-20 | 长春工程学院 | The device and method of the vertical double-cycle process Treating Municipal Sewage of pulling flow type |
| CN106865771B (en) * | 2017-03-31 | 2023-08-18 | 长春工程学院 | Device and method for treating urban sewage by plug-flow type vertical double-circulation process |
| CN111170472A (en) * | 2020-01-17 | 2020-05-19 | 上海同瑞环保科技有限公司 | Method for purifying river channel by using gallery propagation bacteria |
| CN113788532A (en) * | 2021-09-27 | 2021-12-14 | 肇庆市鹏凯环保装备有限公司 | Water treatment circulating equipment and treatment method |
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Open date: 20080709 |