CN213506196U - Add magnetism MBBR sewage treatment system - Google Patents
Add magnetism MBBR sewage treatment system Download PDFInfo
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- CN213506196U CN213506196U CN202021926366.9U CN202021926366U CN213506196U CN 213506196 U CN213506196 U CN 213506196U CN 202021926366 U CN202021926366 U CN 202021926366U CN 213506196 U CN213506196 U CN 213506196U
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Abstract
A magnetized MBBR sewage treatment system is characterized in that an inlet of an anaerobic tank is connected with a sewage inlet pipe, and an outlet of the anaerobic tank is connected with an anoxic tank; the anaerobic tank is connected with the aerobic tank, a first outlet of the aerobic tank is connected with the anaerobic tank through a mixed liquid reflux pump, a second outlet is connected with an inlet of the secondary sedimentation tank, and a third outlet is connected with an inlet of the membrane hanging tank; a sludge scraper is arranged in the secondary sedimentation tank, a first outlet of the secondary sedimentation tank is connected with a clear water outlet pipe, a second outlet is connected with a first inlet of the membrane hanging tank and an inlet of the anaerobic tank through a return sludge pump, a third outlet is connected with a high shear and a magnetic powder separator through a residual sludge pump, one outlet of the magnetic powder separator is connected with a second inlet of the membrane hanging tank, and the other outlet is connected with a residual sludge discharge pipe; and a third inlet of the membrane hanging tank is connected to a sewage inlet pipe, and an outlet of the membrane hanging tank is connected to an aerobic tank. The utility model provides an among the current MBBR technique the volume of packing very big, pack difficult fluidization, be unfavorable for the problem of full flow operation.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a add magnetism MBBR sewage treatment system.
Background
At present, the biological sewage treatment technology is mainly divided into two types: an activated sludge process and a biofilm process. The activated sludge process is a technique of allowing a microorganism population to gather on activated sludge, suspending the activated sludge in a reactor, and purifying the sewage by widely contacting the activated sludge with the sewage. The biofilm method is a method in which a microbial population is attached to the surface of an object in a film form and brought into contact with sewage to purify the sewage.
The A2O technology is the abbreviation of Anaerobic-Oxic in English, and is the integration of the traditional activated sludge process, the biological nitrification and denitrification process and the biological phosphorus removal process. It consists of an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank. The function of the anaerobic tank is to release phosphorus, and simultaneously, part of organic matters are oxidized; the primary function of the anoxic tank is denitrification, and nitrate nitrogen is sent from the aerobic reactor through internal circulation; the aerobic tank has the functions of removing organic matters, nitrifying, absorbing phosphorus and the like; the sedimentation tank has the function of sludge-water separation, one part of sludge flows back to the anaerobic reactor, and supernatant is discharged as treated water.
The Moving Bed Biofilm Reactor (MBBR) process is a sewage treatment process combining an activated sludge process (suspended growth) and a biofilm process (fluidized state attached growth); the added suspended filler (the density is close to water) provides a carrier for the growth of microorganisms, and the biomass in unit volume is improved, so that the sewage treatment efficiency is improved. The MBBR process has the characteristics of high efficiency and operation flexibility of an activated sludge process, impact load resistance, long sludge age and less excess sludge of a traditional biofilm process. The advantages of the two are fully combined, the respective defects are made up, the method can be combined with the technologies of A2O, an oxidation ditch, SBR and the like, and the method has a more efficient treatment effect. The traditional MBBR technology adopts a suspended filler, considers factors such as specific surface area, carrier interception and the like, and generally selects a carrier diameter more than or equal to 25 mm. The density of the HDPE is 0.95-0.98 g/cm3, and the density after film hanging is close to 1g/cm 3. However, the filler has the following problems: the specific surface area is small, 450m2/m3, the input amount is large, sometimes even reaches 30 percent of the volume of the pool, the fluidization is difficult, the energy consumption of the impeller is large, the failure rate is high, the impeller can only be used in an aerobic pool generally, and an interception net with a large area needs to be made. Therefore, it is important to invent an MBBR sewage treatment system which can reduce the volume of the filler and is convenient for circulating and refluxing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a add magnetism MBBR sewage treatment system, the volume of packing is very big in solving current MBBR technique, packs difficult fluidization, is unfavorable for the problem of full flow operation.
The utility model provides a technical scheme that its technical problem adopted is:
a magnetized MBBR sewage treatment system comprises a biochemical pool, wherein the biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool, the inlet of the anaerobic pool is connected with a sewage inlet pipe, and the outlet of the anaerobic pool is connected with the anoxic pool; the anaerobic tank is connected to the aerobic tank, a first outlet of the aerobic tank is connected to the anaerobic tank through a mixed liquid reflux pump, a second outlet of the aerobic tank is connected to an inlet of the secondary sedimentation tank, and a third outlet of the aerobic tank is connected to an inlet of the membrane hanging tank; a mud scraper is arranged in the secondary sedimentation tank, a first outlet of the secondary sedimentation tank is connected with a clear water outlet pipe, a second outlet is connected to a first inlet of the membrane hanging tank and an inlet of the anaerobic tank through a return sludge pump, a third outlet is connected to a magnetic powder separator through a residual sludge pump, one outlet of the magnetic powder separator is connected to a second inlet of the membrane hanging tank, and the other outlet is connected with a residual sludge discharge pipe; and a third inlet of the membrane hanging tank is connected to a sewage inlet pipe, and an outlet of the membrane hanging tank is connected to an aerobic tank.
Furthermore, in order to simplify the sewage treatment system and simultaneously remove organic matters more thoroughly, the biochemical tank adopts an oxidation ditch tank type structure.
Furthermore, in order to better push flow, carry out biochemical reaction and effectively prevent sedimentation, submersible flow pushers are arranged in the anaerobic pool, the anoxic pool and the aerobic pool.
Further, in order to better ensure the precipitation effect, the surface load of the secondary sedimentation tank is 1.5m3/(m2*h)。
Furthermore, in order to increase the oxygen content in the sewage and prevent sludge from settling, aerators are arranged in the aerobic tank and the membrane hanging tank.
Furthermore, in order to better recover the magnetic powder in the excess sludge and destroy a biological film growing on the surface of the magnetic powder so as to separate the magnetic powder from the biological film, a high shear is arranged between the excess sludge pump and the magnetic powder separator.
By using the method and the system provided by the utility model, the biochemical pool adopts an oxidation ditch pool type structure, the submersible water impeller is arranged in the channel, and water flow continuously rotates in the ditch to form a better flow state; the filler of the MBBR adopts superfine magnetic powder with about 100-200 meshes and very large specific surface area which reaches 56000m2/m3Above, the traditional filler is only 450m2/m3The volume amount of the filler is greatly reduced, and the filler is easy to combine with sludge due to the tiny crystal nucleus. The biomembrane formed after the magnetic powder is combined with the sludge has good fluidity, can smoothly enter the whole system circulation, and is convenient for sludge reflux and mixed liquid reflux through the sludge pump and the impeller. And the magnetic powder is easy to recycle due to the magnetism of the magnetic powder. In order to recover the magnetic powder in the excess sludge, a high shearing machine is adopted to destroy a biological film growing on the surface of the magnetic powder so as to separate the magnetic powder from the biological film, then a magnetic powder separator is used for recovering the magnetic powder in the biological film, and the sludge is discharged to an excess sludge treatment system. Use the utility model discloses method and system have solved not only that the volume of packing is very big in the current MBBR technique, and the difficult fluidization of packing is unfavorable for the problem of full flow operation, has also practiced thrift the sewage treatment cost simultaneously.
Drawings
FIG. 1 is a schematic view of the sewage treatment method and system flow of the magnetic MBBR of the present invention.
Detailed Description
The present invention will be described in more detail with reference to the accompanying drawings and examples.
A magnetized MBBR sewage treatment system as shown in figure 1,
the biochemical pond is gone into through sewage inlet tube 1 to the sewage of collecting, and this biochemical pond comprises anaerobism pond 2, oxygen deficiency pond 3 and good oxygen pond 4, adopts the continuous pivoted oxidation ditch pond type structure of rivers, and its structure is confined annular irrigation canals and ditches, all is provided with the partition wall in the middle of every reaction tank, all is provided with the dive impeller in anaerobism pond 2, oxygen deficiency pond 3 and good oxygen pond 4 and pushes away the flow to sewage. The submersible water impeller mainly plays a role in mixing and stirring in the biochemical pool, is used for stirring mixed sludge, updates sewage by impeller flow, prevents sludge from settling and improves the treatment efficiency of the sewage.
Starting a sewage treatment system for the first time, firstly adding a certain amount of magnetic powder-suspended biomembrane into a membrane-suspended pond, wherein the adding amount of the magnetic powder-suspended biomembrane is 1000-2000 mg in each liter of sewage;
the sewage firstly enters an anaerobic tank 2 for anaerobic treatment, the hydraulic retention time is 1 hour, and partial organic matters in the sewage are decomposed by the action of anaerobic organisms;
the sewage after anaerobic treatment flows into an anoxic tank 3 for anoxic treatment, and the water power stays for 2 hours to denitrify the wastewater;
the sewage after the anoxic treatment flows into an aerobic tank 4 for aeration treatment, the hydraulic retention time is 6 hours, organic matters in the sewage are further degraded, and the sewage is subjected to nitration reaction and phosphorus absorption;
the mixed liquor in the aerobic tank 4 flows back to the anoxic tank 3 through a mixed liquor reflux pump 5 to continue to be subjected to circulation treatment; discharging the effluent in the aerobic tank 4 into a secondary sedimentation tank 6 for sludge-water separation, wherein the surface load of the secondary sedimentation tank 6 is 1.5m3/(m2H), clear water at the upper layer is discharged through a clear water outlet pipe 7, precipitated sludge is scraped into a sludge hopper through a sludge scraper, and a part of sludge is returned to the anaerobic tank 2 through a return sludge pump 8 to maintain the concentration of the sludge in the biochemical tank; a part of sludge flows back to the membrane tank 12 for coating the magnetic powder with a biofilm (when oxygen and nutrients required by the growth of microorganisms exist, the microorganisms can be naturally attached to the carrier to form the biofilm), the membrane tank 12 is cylindrical, and an aerator is arranged below the membrane tank to provide oxygen required by the reaction of the microorganisms on the one hand and sufficiently mix the magnetic powder and the activated sludge on the other handAnd when the magnetic powder is contacted, the magnetic powder and the sludge are mixed under the drive of the gas.
Excess sludge in the secondary sedimentation tank 6 is discharged into a high shear 10 through an excess sludge pump 9, the high shear 10 is also called a deflocculating machine, and sludge flocs containing magnetic seeds are sheared by utilizing the rapid rotation of a high-speed dispersion wheel, so that the aim of separating magnetic powder and sludge is fulfilled, and the effect of sewage treatment is fulfilled. The high shearing machine has the characteristics of high shearing efficiency, thorough separation of magnetic powder and sludge and the like, is key equipment for realizing high recovery rate of the magnetic powder, and has important significance for reducing the stability of water outlet of the equipment and the operation cost. Discharging the scattered magnetic powder biomembrane into a magnetic powder separator 11, performing magnetic powder separation treatment on the sludge, discharging the residual sludge into a residual sludge treatment system through a residual sludge discharge pipe 13, dehydrating, and discharging. The excess sludge treatment system comprises a sludge storage pool, a sludge inlet pump, a belt type dehydrator (or a plate frame dehydrator, a centrifugal dehydrator), a mud bucket and the like, and is a conventional treatment system and a flow in the industry, which are not the key points of the utility model, which are not described in detail one by one.
The magnetic powder recovered by the magnetic powder separator 11 and the newly supplemented magnetic powder are discharged into the membrane hanging tank 12, a small amount of sewage is added for aeration and stirring, so that the magnetic powder is hung on a biological membrane, and the magnetic powder hung with the membrane is discharged into the aerobic tank 4 for biochemical treatment. The amount of the magnetic powder is related to the amount of the discharged sludge, namely, the amount of the discharged sludge is related to the concentration of the inlet water, the concentration of the inlet water is high, the amount of the generated sludge is large, a small amount of the magnetic powder can be taken away when the sludge is discharged, the recovery rate of the magnetic powder is about 99%, and the amount of the newly supplemented magnetic powder is 0.6-0.8 mg/L.
The above description is combined with the accompanying drawings to carry out the exemplary description of the magnetic MBBR sewage treatment method and system, and it is obvious that the utility model discloses the concrete realization is not restricted by above-mentioned mode, as long as adopted the utility model discloses a method conception and technical scheme go on various improvements, or not improve and directly be applied to all falling within the protection scope of other occasions.
Claims (6)
1. A magnetized MBBR sewage treatment system comprises a biochemical pool and is characterized in that the biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool, wherein the inlet of the anaerobic pool is connected with a sewage inlet pipe, and the outlet of the anaerobic pool is connected with the anoxic pool; the anaerobic tank is connected to the aerobic tank, a first outlet of the aerobic tank is connected to the anaerobic tank through a mixed liquid reflux pump, a second outlet of the aerobic tank is connected to an inlet of the secondary sedimentation tank, and a third outlet of the aerobic tank is connected to an inlet of the membrane hanging tank; a mud scraper is arranged in the secondary sedimentation tank, a first outlet of the secondary sedimentation tank is connected with a clear water outlet pipe, a second outlet is connected to a first inlet of the membrane hanging tank and an inlet of the anaerobic tank through a return sludge pump, a third outlet is connected to a magnetic powder separator through a residual sludge pump, one outlet of the magnetic powder separator is connected to a second inlet of the membrane hanging tank, and the other outlet is connected with a residual sludge discharge pipe; and a third inlet of the membrane hanging tank is connected to a sewage inlet pipe, and an outlet of the membrane hanging tank is connected to an aerobic tank.
2. The magnetized MBBR sewage treatment system of claim 1, wherein the biochemical tank is of an oxidation ditch tank type structure.
3. The magnetized MBBR sewage treatment system of claim 1, wherein the anaerobic tank, the anoxic tank and the aerobic tank are all provided with submersible water impellers.
4. The magnetized MBBR sewage treatment system of claim 1, wherein the surface load of the secondary sedimentation tank is 1.5m3/(m2*h)。
5. The magnetized MBBR sewage treatment system of claim 1, wherein an aerator is arranged in each of the aerobic tank and the biofilm culturing tank.
6. The magnetized MBBR sewage treatment system of claim 1, wherein a high shear is arranged between the excess sludge pump and the magnetic powder separator.
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| CN202021926366.9U CN213506196U (en) | 2020-09-04 | 2020-09-04 | Add magnetism MBBR sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194251A (en) * | 2020-09-04 | 2021-01-08 | 广东新环环保产业集团有限公司 | Magnetized MBBR sewage treatment method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194251A (en) * | 2020-09-04 | 2021-01-08 | 广东新环环保产业集团有限公司 | Magnetized MBBR sewage treatment method and system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A magnetized MBBR sewage treatment system Effective date of registration: 20210806 Granted publication date: 20210622 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: GUANGDONG XINHUAN ENVIRONMENTAL INDUSTRY GROUP Co.,Ltd. Registration number: Y2021440020077 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220818 Granted publication date: 20210622 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: GUANGDONG XINHUAN ENVIRONMENTAL INDUSTRY GROUP CO.,LTD. Registration number: Y2021440020077 |