CN115028266A - Oxidation ditch and oxygen supply combined equipment and non-shutdown upgrading and transforming method thereof - Google Patents
Oxidation ditch and oxygen supply combined equipment and non-shutdown upgrading and transforming method thereof Download PDFInfo
- Publication number
- CN115028266A CN115028266A CN202210812854.4A CN202210812854A CN115028266A CN 115028266 A CN115028266 A CN 115028266A CN 202210812854 A CN202210812854 A CN 202210812854A CN 115028266 A CN115028266 A CN 115028266A
- Authority
- CN
- China
- Prior art keywords
- oxygen supply
- aeration
- section
- oxidation ditch
- aerobic
- 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.)
- Pending
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 57
- 239000001301 oxygen Substances 0.000 title claims abstract description 57
- 230000003647 oxidation Effects 0.000 title claims abstract description 49
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000001131 transforming effect Effects 0.000 title claims description 7
- 238000005273 aeration Methods 0.000 claims abstract description 59
- 238000005276 aerator Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 14
- 239000010802 sludge Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 17
- 238000010992 reflux Methods 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000002503 metabolic effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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 an oxidation ditch, an on-line upgrading and reconstruction method thereof and oxygen supply combined equipment, comprising more than two parallel flow lines, wherein each flow line comprises an anaerobic section, an anoxic section and an aerobic section; each aerobic section is provided with a plurality of groups of submerged flow pushers and oxygen supply combination equipment which are arranged along the flowing direction of the mixed liquid; aeration devices are respectively arranged above and below each filler. During construction, each aerobic section is stopped one by one, other aerobic sections continue to operate, and corresponding submerged flow impeller and oxygen supply combined equipment are installed in a hoisting mode in a pool of the stopped aerobic section and put into operation. The invention makes the Chemical Oxygen Demand (COD) of the oxidation ditch Cr ) And ammonia Nitrogen (NH) 3 N) the removal rate is obviously improved compared with that before the modification, and the technical means of suspending part of the gallery rotary disk aerator in a short time is adopted, so that the quality of the effluent of the oxidation ditch is not greatly influenced, and the quality of the effluent of the total discharge outlet can always reach the standard.
Description
Technical Field
The invention relates to the technical field of sewage treatment facilities, in particular to an oxidation ditch and oxygen supply combined device and an upgrading and reforming method without shutdown thereof.
Background
Biological sewage treatment is a general term for treating sewage by a biological method and is one of the most extensive methods in modern sewage treatment application. Mainly converts organic matters in the sewage into simple inorganic matters by means of the metabolism of microorganisms, so that the sewage is purified: removing soluble organic matter and converting the organic matter into carbon dioxide (CO) 2 ) And water (H) 2 O), removing other soluble inorganic nutrient elements such as nitrogen (N) and finally converting into nitrogen (N) 2 ) Finally converting phosphorus (P) into residual sludge rich in phosphorus, separating the residual sludge from water, and the like; flocculating settling and degrading colloidal solid; and thirdly, organic matters are stabilized, and some organic matters which are toxic, harmful and difficult to degrade can be primarily decomposed or partially degraded by microorganisms, so that the toxic effect is reduced or partial stabilization is obtained, or the organic matters are finally completely converted into inorganic matters to be stabilized.
Biological treatment of sewage can be generally divided into two main categories, namely aerobic treatment and anaerobic treatment. The aerobic treatment is to remove pollutants in the wastewater by utilizing the metabolic activity of aerobic microorganisms under the action of aeration, and common aerobic treatment processes include an Activated Sludge Process (Activated Sludge Process), a Biological Contact Oxidation Process (Biological Contact Oxidation Process), an Oxidation Ditch (Oxidation Ditch) and the like; anaerobic treatment is the removal of pollutants from wastewater by the metabolic action of anaerobic microorganisms in the absence of oxygen, and a common anaerobic process is hydrolytic acidification and upflow anaerobic sludge blanket (anaerobic sludge blanket)Up-flow Anaerobic Sludge Bed), anaerobic biofilter (Anaerobic Biological Filter), internal circulation anaerobic reactor(s)Internal Cirdosage), and the like.
The method for removing organic matters from sewage by adopting biological treatment is most economical, and compared with a physical method and a chemical method, the biological method has the advantages of low investment and low operation cost in sewage treatment, and the method for removing ammonia nitrogen in water by adopting the biological treatment method is most effective.
As shown in FIG. 1, in the prior art, a large-scale sewage treatment plant is built in the eighty and ninety years of the last century, and the biological treatment processes adopted by the main processes, such as a plug-flow activated sludge process, a carrousel oxidation ditch and the like, can meet the current sewage discharge standard.
However, with the increasing importance of the social public on environmental protection and the stricter environmental management, the pollutant emission standard is upgraded year by year. Using chemical oxygen demand index (COD) Cr ) For example, part of the territory is performing the secondary emission standard, COD Cr Less than or equal to 100mg/L, and partial areas execute the first-level B emission standard, namely COD Cr Less than or equal to 60mg/L, and most of the implementation in recent years is the first-class A emission standard, namely COD Cr ≤50mg/L。
In addition to the method of adding a deep treatment process section after the existing biological treatment process section, upgrading the existing biological treatment process to improve the treatment capacity and efficiency is also a quite effective method for meeting the increasingly strict pollutant emission standards.
Therefore, how to meet the requirement of upgrading and reconstruction on the premise that the sewage treatment plant is not stopped is achieved, and the problem that the water charge loss of the sewage treatment plant is urgently needed to be solved by technical personnel in the field is solved.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides an oxidation ditch, an oxygen supply combination plant for the oxidation ditch, and a method for continuously upgrading the oxidation ditch, which can achieve the purpose of increasing the Chemical Oxygen Demand (COD) of the oxidation ditch Cr ) And ammonia Nitrogen (NH) 3 N) the removal rate is obviously improved compared with that before the modification, and the measures of suspending part of the gallery rotary disk aerator in a short time do not cause great influence on the quality of the effluent of the oxidation ditch, and the quality of the effluent of the total discharge outlet can always reach the standard.
In order to achieve the purpose, the invention discloses an oxidation ditch, which comprises more than two parallel flow lines; more than two flow lines are arranged in parallel; each flow line comprises an anaerobic section, an anoxic section and an aerobic section;
each anaerobic section is provided with a stirring device;
each anoxic section is provided with a submerged propeller;
each aerobic section is provided with a mixed liquid reflux device and a peripheral secondary sedimentation tank sludge reflux device, the mixed liquid is refluxed to the corresponding anoxic section through the mixed liquid reflux device, and the mixed liquid is refluxed to the anaerobic section through the secondary sedimentation tank sludge reflux device.
Wherein, each aerobic section is provided with a plurality of groups of submerged flow pushers arranged along the flowing direction of the mixed liquid and a plurality of groups of oxygen supply combination equipment.
The invention also provides oxygen supply combined equipment of the oxidation ditch, wherein each oxygen supply combined equipment comprises two sets of aeration devices arranged at the bottom and the top and a flat plate filler frame arranged between the two sets of aeration devices.
Preferably, in each oxygen supply combined equipment, the aeration devices correspondingly arranged at the top are aeration branch pipes, and the aeration devices correspondingly arranged at the bottom are microporous aeration pipes.
More preferably, all the aeration devices of all the oxygen supply combined equipment are connected with a pond top aeration main pipe arranged at the top of the pond body of the oxidation ditch, and are connected with an air source through the pond top aeration main pipe.
The invention also provides a method for upgrading and transforming the oxidation ditch comprising the oxygen supply combination equipment without stopping running, which comprises the following steps:
4.1, hoisting and installing a corresponding submerged flow pusher in the tank of the aerobic section of the parking rotary disk aerator;
4.2, hoisting and installing the frames of all the oxygen supply combined equipment in the pool of the aerobic section of the parking rotary disk aerator;
step 4.3, hoisting and installing an aeration main pipe at the top of the aerobic section of the oxidation ditch in the aerobic section of the parking rotary disc aerator, connecting the aeration branch pipes of the oxygen supply combined equipment with the aeration main pipe, and putting the aeration branch pipes into operation;
4.4, after the installation is finished, stopping the rotary disk aerator, switching the oxygen supply mode of the aerobic section from the rotary disk aerator to the micropore aerator pipe which is arranged at the lower part of the corresponding oxygen supply combined equipment and is finished, and dismantling the rotary disk aerator;
step 4.5, cleaning the accumulated mud at the bottom of the pool which is turned over due to bottom aeration while running;
and 4.6, repeatedly executing the steps 4.1 to 4.5 until the construction of all the aerobic sections is completed.
The invention has the beneficial effects that:
in the process of upgrading and transforming without continuous operation, the invention adopts the measure of suspending part of the gallery rotary disc aerator in a short time by matching with the hoisting section steel structure and equipment, thereby not causing great influence on the effluent quality of the oxidation ditch, and the effluent quality of the total discharge outlet can always reach the standard.
In the invention, the oxygen supply efficiency of the rotary disk aerator is about 10 percent generally, while the oxygen supply efficiency of the microporous aerator pipe is more than 20 percent generally, and the oxygen dissolving utilization rate of the aeration system is improved, so that the Chemical Oxygen Demand (COD) of the oxidation ditch is increased Cr ) And ammonia Nitrogen (NH) 3 and-N) the removal rate is obviously improved compared with that before the transformation, and the goal of upgrading and transforming the whole project is fully completed.
The invention adopts the microporous aeration pipe with higher oxygen utilization rate, so that the power consumption of the operation of the oxidation ditch is obviously reduced, and the energy consumption of the combination of the air suspension fan and the submerged impeller is much lower than that of the original rotary disk aeration machine, thereby saving a certain amount of operation cost for owners and further generating certain economic benefit.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structure of an oxidation ditch in the prior art.
Fig. 2 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic partial cross-sectional enlarged structural view of a set of under-liquid flow-pushing devices and oxygen supply combined equipment packing according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an oxygen supply assembly according to an embodiment of the present invention.
Detailed Description
Example 1
As shown in fig. 2 and 3, an embodiment of the oxidation ditch of the present invention includes more than two parallel flow lines arranged in parallel, each flow line including an anaerobic section 1, an anoxic section 2 and an aerobic section 3. Each anaerobic section 1 is provided with a stirring device 4. Each anoxic section 2 is provided with an underwater propeller 5.
Each aerobic section 3 is provided with a mixed liquid reflux device and a peripheral secondary sedimentation tank sludge reflux device, the mixed liquid is refluxed to the corresponding anoxic section 2 through the mixed liquid reflux device, and the mixed liquid is refluxed to the anaerobic section 1 through the secondary sedimentation tank sludge reflux device.
Wherein, each aerobic section 3 is provided with a plurality of groups of submerged flow pushers 6 and a plurality of groups of oxygen supply combination equipment 7 which are arranged along the flowing direction of the mixed liquid.
As shown in FIG. 4, the present invention also provides oxygen supply combination equipment for an oxidation ditch, wherein each oxygen supply combination equipment 7 comprises two sets of aeration devices arranged at the bottom and the top, and a flat plate filler frame arranged between each two sets of aeration devices.
In some embodiments, each oxygen supply assembly 7 includes a top aerator manifold 9 and a bottom aerator manifold 10.
In some embodiments, all the aeration devices of all the oxygen supply combination equipment 7 are connected with a tank top aeration main pipe 8 arranged at the top of the tank body of the oxidation ditch, and are connected with the gas source through the tank top aeration main pipe 8.
The invention also provides a method for upgrading and transforming the oxidation ditch comprising the oxygen supply combination equipment 7 without stopping running, which comprises the following steps:
4.1, hoisting and installing a corresponding submerged impeller in a pool of an aerobic section of the parking rotary disc aerator;
4.2, hoisting and installing frames of all the oxygen supply combined equipment 7 in a pool of an aerobic section of the parking rotary disc aerator;
4.3, hoisting an aeration main pipe arranged at the top of an aerobic section of the oxidation ditch in a pool of the aerobic section of the parking rotary disc aerator, connecting an aeration branch pipe 9 of the oxygen supply combined equipment 7 with the aeration main pipe, and putting the aeration branch pipe and the aeration main pipe into operation;
4.4, after the completion, stopping the rotary disk aerator, switching the oxygen supply mode of the aerobic section from the rotary disk aerator to the micropore aerator pipe at the lower part of the corresponding oxygen supply combined equipment 7 after the installation is completed, and dismantling the rotary disk aerator;
step 4.5, cleaning the accumulated mud at the bottom of the pool which is turned over due to bottom aeration while running;
and 4.6, repeatedly executing the steps 4.1 to 4.5 until the construction of all the aerobic sections is completed.
Example 2
Taking the carrousel oxidation ditch as an example, the current situation of the carrousel oxidation ditch is as follows:
design scale A: 40000m 3 D, 2 seats, running in parallel;
b, service time: about 10 years;
c, the external dimension is as follows: 85.6 × 34.5 × 4.7 m;
d, effective volume: about 11000m 3 A seat.
The main problems of the carrousel oxidation ditch are as follows:
the bottom of the tank A has accumulated mud with different degrees, so that the actual hydraulic retention time is insufficient;
b, a rotary disk aerator is used for oxygen supply and flow pushing, so that the oxygen utilization rate is low and the energy consumption is high;
the technical upgrading and reconstruction scheme adopted by the invention is as follows:
emptying the tank body and cleaning accumulated mud at the bottom in order to ensure and recover enough hydraulic retention time;
b, in order to improve the oxygen supply efficiency, the aeration mode of the aerobic section is changed into microporous aeration at the bottom of the tank, a blower is added in a matching way, and a rotary disk aerator is dismantled;
c, in order to improve the cross-sectional flow rate of the gallery, a submerged flow impeller is additionally arranged on the aerobic section;
d, in order to improve the sludge concentration, a biological filler is additionally arranged in the aerobic section;
e, adding a supplementary carbon source adding system for ensuring that sufficient carbon source exists in the denitrification reaction;
and (3) estimating the upgrading and reconstruction period:
after all preparation works are done, upgrading and reconstruction are carried out according to the sequence of dredging, removing the existing equipment, installing a flow impeller, installing oxygen supply combined equipment, connecting an aeration air pipe, inoculating the sludge after water inlet and recovering the operation. If the sewage treatment plant is completely shut down after approval for the upgrade of the oxidation ditch, the minimum construction period of the upgrade required for the upgrade is about 20 days, and the maximum construction period is about 30 days (mainly, the dredging time cannot be completely determined).
If the sewage treatment plant is only operated in the precipitation amount within a specific time period after being approved to cooperate with the upgrading and reconstruction of the oxidation ditch, the upgrading and reconstruction are carried out while operating, namely one oxidation ditch operates and the other oxidation ditch operates, the shortest construction period is about 35 days (the operating oxidation ditch can directly transfer the activated sludge to the oxidation ditch after the upgrading and reconstruction is completed, the sludge inoculation time can be saved), and the longest construction period is about 55 days.
As can be seen from the foregoing description of the upgrading and rebuilding period, the upgrading and rebuilding period is as short as about 20 days and as long as about 55 days under the condition of making full preparations and eliminating interference of objective factors (rain). According to the average 35,000m of sewage treatment plants 3 Calculated as/d, there will be about 700,000m 3 (35,000m 3 /d×20d)～825,000m 3 (15,000m 3 The/d x 55d) sewage needs to be temporarily stored or other treatment methods are adopted. If the worst adverse conditions are considered, such as rainy days in the upgrading and reconstruction process and serious mud accumulation at the bottom of the pool (partial mud accumulation at the position of the bend is hardened), the upgrading and reconstruction period is longer, and more sewage needs to be temporarily stored or treated by other methods.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the above teachings. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.
Claims (5)
1. The oxidation ditch comprises more than two parallel flow lines; more than two flow lines are arranged in parallel; each flow line comprises an anaerobic section (1), an anoxic section (2) and an aerobic section (3);
each anaerobic section (1) is provided with a stirring device (4);
each anoxic section (2) is provided with a submerged propeller (5);
each aerobic section (3) is provided with a mixed liquid reflux device and an external secondary sedimentation tank sludge reflux device, the mixed liquid is refluxed to the corresponding anoxic section (2) through the mixed liquid reflux device, and the mixed liquid is refluxed to the anaerobic section (1) through the secondary sedimentation tank sludge reflux device;
the method is characterized in that:
each aerobic section (3) is provided with a plurality of groups of submerged plug flow devices (6) and a plurality of groups of oxygen supply combined equipment (7) which are arranged along the flowing direction of the mixed liquid.
2. An oxygen supply assembly for an oxidation ditch according to claim 1, characterized in that each of said oxygen supply assemblies (7) comprises two sets of aeration devices arranged at the bottom and at the top, and a flat packing frame arranged between each set of aeration devices.
3. An oxygen supply assembly for an oxidation ditch according to claim 2, characterized in that in each of said oxygen supply assemblies (7), the corresponding aeration means disposed at the top are aeration laterals (9), and the corresponding aeration means disposed at the bottom are microporous aeration pipes (10).
4. The oxygen supply combination equipment for the oxidation ditch according to claim 3, characterized in that all the aeration devices of all the oxygen supply combination equipment (7) are connected with a pond top aeration main pipe (8) arranged at the top of the pond body of the oxidation ditch and are connected with an air source through the pond top aeration main pipe (8).
5. The method for upgrading and transforming the oxidation ditch of the oxygen supply combination equipment of any one of claims 2 to 4 without stopping running comprises the following steps:
step 1, in an operating state, installing an aeration fan and a carbon source adding device of each aeration device at the side of a pool of each aerobic section, arranging a pool top aeration main pipe (8) at the top of a pool body of the oxidation ditch, and reserving a pipeline interface in the pool;
step 2, prefabricating all frames of the oxygen supply combined equipment (7) and all the aeration devices, and preparing for hoisting;
step 3, in an operating state, installing a steel section structure for fixing above the pool of each aerobic section;
step 4, stopping the rotary disc aerator of each aerobic section one by one, completing the following construction, and continuing to operate other aerobic sections, wherein the construction process is as follows:
4.1, hoisting and installing a corresponding submerged impeller in the tank of the aerobic section of the parking rotary disc aerator;
4.2, hoisting and installing the frames of all the oxygen supply combined equipment (7) in the pool of the aerobic section of the parking rotary disc aerator;
4.3, hoisting and installing an aeration main pipe at the top of the aerobic section of the oxidation ditch in the aerobic section of the parking rotary disc aerator, connecting the aeration branch pipes (9) of the oxygen supply combined equipment (7) with the aeration main pipe, and putting the aeration branch pipes into operation;
4.4, after the installation is finished, stopping the rotary disk aerator, switching the oxygen supply mode of the aerobic section from the rotary disk aerator to the micropore aerator pipe which is arranged at the lower part of the corresponding oxygen supply combined equipment (7) and dismantling the rotary disk aerator;
step 4.5, cleaning the accumulated mud at the bottom of the pool which is turned over due to bottom aeration while running;
and 4.6, repeatedly executing the steps 4.1 to 4.5 until the construction of all the aerobic sections is completed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021107945717 | 2021-07-14 | ||
| CN202110794571.7A CN113387441A (en) | 2021-07-14 | 2021-07-14 | Oxidation ditch and non-outage upgrading and transforming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115028266A true CN115028266A (en) | 2022-09-09 |
Family
ID=77626073
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110794571.7A Pending CN113387441A (en) | 2021-07-14 | 2021-07-14 | Oxidation ditch and non-outage upgrading and transforming method thereof |
| CN202210812854.4A Pending CN115028266A (en) | 2021-07-14 | 2022-07-12 | Oxidation ditch and oxygen supply combined equipment and non-shutdown upgrading and transforming method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110794571.7A Pending CN113387441A (en) | 2021-07-14 | 2021-07-14 | Oxidation ditch and non-outage upgrading and transforming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN113387441A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2806445Y (en) * | 2005-05-12 | 2006-08-16 | 中国海洋大学 | Aeration tank for sewage treatment |
| US20090272687A1 (en) * | 2006-10-30 | 2009-11-05 | Chiang Ming-Hui | Method of Deep Sewage Treatment without Sludge Discharge and Device Therefor |
| CN101628775A (en) * | 2009-08-09 | 2010-01-20 | 江苏鼎泽环境工程有限公司 | Improved carrousel oxidation ditch |
| CN105217779A (en) * | 2015-11-03 | 2016-01-06 | 南通科技职业学院 | A kind of Mobile biological bed of packings reactor and using method |
| CN106745741A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | The anaerobic oxidation ditch and its operating method of intensified anti-nitrated denitrogenation dephosphorizing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3634403B2 (en) * | 1994-04-26 | 2005-03-30 | 日立機電工業株式会社 | Denitrification and dephosphorization methods in oxidation ditch |
| CN206680260U (en) * | 2017-04-14 | 2017-11-28 | 福建龙源环境工程技术有限公司 | A kind of modified form Carrousel oxidation ditch |
| CN211712765U (en) * | 2019-11-21 | 2020-10-20 | 西安创业水务有限公司 | Water-saving mounting device of underwater flow impeller |
-
2021
- 2021-07-14 CN CN202110794571.7A patent/CN113387441A/en active Pending
-
2022
- 2022-07-12 CN CN202210812854.4A patent/CN115028266A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2806445Y (en) * | 2005-05-12 | 2006-08-16 | 中国海洋大学 | Aeration tank for sewage treatment |
| US20090272687A1 (en) * | 2006-10-30 | 2009-11-05 | Chiang Ming-Hui | Method of Deep Sewage Treatment without Sludge Discharge and Device Therefor |
| CN101628775A (en) * | 2009-08-09 | 2010-01-20 | 江苏鼎泽环境工程有限公司 | Improved carrousel oxidation ditch |
| CN105217779A (en) * | 2015-11-03 | 2016-01-06 | 南通科技职业学院 | A kind of Mobile biological bed of packings reactor and using method |
| CN106745741A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | The anaerobic oxidation ditch and its operating method of intensified anti-nitrated denitrogenation dephosphorizing |
Non-Patent Citations (1)
| Title |
|---|
| 刘石虎: "重庆某污水厂不停产扩能技改实例", 大众标准化(半月刊), pages 1235 - 1236 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113387441A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109650645B (en) | Integrated rural domestic sewage treatment equipment and sewage treatment method | |
| CN112174317A (en) | Device and method for side flow enhanced biological phosphorus removal process based on carbon source development in excess sludge | |
| CN103332788B (en) | Multi-stage anaerobic-aerobic combined nitrogen and phosphorus removing device and method for rural domestic sewage | |
| CN211111294U (en) | Vertical flow tower type bioreactor | |
| CN210001741U (en) | Sewage treatment device | |
| CN107324497A (en) | A kind of startup method of coupling denitrification Canon PROCESS FOR TREATMENTs pig farm biogas slurry | |
| CN110342750A (en) | The synchronous sewage-treatment plant and technique for realizing sludge in-situ decrement and denitrogenation dephosphorizing | |
| CN114105299A (en) | Device and method for strengthening carbon source and sludge capture combined autotrophic and heterotrophic denitrification of urban sewage | |
| CN209128145U (en) | A kind of Novel anaerobic-anaerobic-aerobic sewage integrated processing system | |
| CN103086561A (en) | Carbon and nitrogen removal system based on moving bed biomembrane reactor | |
| CN111847780A (en) | Sewage treatment process | |
| CN105906151A (en) | Sewage treatment device and method of high-density biochemical system in combination with activated carbon filtration system | |
| CN105819626A (en) | Combined customized sewage disposal system | |
| CN106565054A (en) | Village and town wastewater advanced treatment integrated device and method | |
| CN115028266A (en) | Oxidation ditch and oxygen supply combined equipment and non-shutdown upgrading and transforming method thereof | |
| CN116002861A (en) | Built-in internal and external mixed liquid backflow two-stage anoxic-aerobic device and process for precipitation | |
| CN102942286A (en) | Combined process of high-carbon and high-nitrogen organic wastewater treatment | |
| CN210048616U (en) | Plasma sewage purification device | |
| CN209522654U (en) | Sulfur-bearing/nitrogenous organic wastewater and electroplating wastewater combined apparatus | |
| CN112010505A (en) | High-concentration COD and NH4+-N wastewater treatment method | |
| CN105439396B (en) | A kind of biological device and its processing method for Treating Municipal Sewage | |
| CN105541025A (en) | BESI technology-based deep treatment method for refining desulfurization wastewater | |
| CN205328825U (en) | Dispose of sewage and realize regenerating AOOC combination equipment of water | |
| CN219469848U (en) | Nonradioactive waste water treatment device | |
| CN217323554U (en) | Improved MBBR (moving bed biofilm reactor) process bag applied to water pollution prevention and control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220909 |