CN108218148B - Efficient MBBR integrated sewage treatment equipment and method - Google Patents
Efficient MBBR integrated sewage treatment equipment and method Download PDFInfo
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- CN108218148B CN108218148B CN201810227120.3A CN201810227120A CN108218148B CN 108218148 B CN108218148 B CN 108218148B CN 201810227120 A CN201810227120 A CN 201810227120A CN 108218148 B CN108218148 B CN 108218148B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
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- 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
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- 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
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- 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
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Abstract
The invention discloses high-efficiency MBBR integrated sewage treatment equipment and a method, wherein the equipment comprises a box body, and an anoxic tank, an aerobic tank, a degassing tank, a sedimentation tank, a clean water tank, an equipment room, a comprehensive pump and a suspended filler are integrally arranged in the box body; suspended fillers are added into the anoxic tank and the aerobic tank; the comprehensive pump is arranged to replace a fan, a stirrer, a reflux pump and a sludge discharge pump in the traditional method, so that the integration of electromechanical equipment is realized, the maintenance and the management are convenient, and the energy consumption is reduced; by using the suspended filler, the treatment effect and the shock load resistance of the system are enhanced, the treatment load is improved, and the tolerance of the system to low-temperature low-matrix is improved; high load, less occupied area, low cost, low operation energy consumption, long service life and low maintenance cost and operation cost.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to MBBR (moving bed biofilm reactor) integrated sewage treatment equipment and a method.
Background
With the rapid development of economy in China, decentralized sewage treatment gradually becomes a focus, and comprises village and town wastewater, small-sized industrial wastewater, emergency wastewater treatment and the like. The dispersive sewage is characterized by large overall volume, small single-strand wastewater volume, high water quality fluctuation, dispersive pollution points and difficult centralized treatment. The existing integrated sewage treatment equipment has more technical types, but the integrated sewage treatment equipment only scales the process of a sewage treatment plant, cannot be designed specifically according to the characteristics of dispersed sewage, is difficult to realize the standard discharge of small-water-volume and large-fluctuation wastewater, and needs a large amount of electromechanical equipment to realize the stirring of sewage and the backflow of nitrifying liquid and sludge, so that the maintenance difficulty and the operation cost are increased. Aiming at the problems that the integrated sewage treatment equipment is too complex in process and difficult to manage, the number of electromechanical equipment is large, the overall energy consumption is too high, and the integrated sewage treatment equipment is difficult to stably reach the standard under the conditions of low water content and high water quality, the market urgently needs the integrated sewage treatment equipment which is high in efficiency, low in cost, low in energy consumption and easy to manage.
Aiming at the existing equipment, the equipment mainly comprises MBR, MBBR, fixed filler and the like. CN 103991957A's integrated sewage treatment device designs for cylindrical casing, divides anaerobic chamber, anoxic chamber, aerobic chamber, mixing chamber and deposit room, adopts traditional technology, and integrated equipment easily appears the operation unstability, receives the impact and resumes difficultly, and the play water can only reach one-level B moreover, and to slightly polluting water, traditional technology is difficult to normal operating. CN 105731735A's rural sewage treatment device of integration, the oxygen deficiency pond sets up in with the good oxygen pond and hangs the filler, and solid-liquid separation adopts MBR, and at first there hangs the filler life weak point, needs periodic replacement, and changes complicated problem, secondly adopts MBR, and investment and working costs are high, and easy the jam, lead to the unable normal operating of equipment, and overhaul the difficulty. In the CN103936157A integrated advanced domestic sewage treatment equipment and the sewage treatment method thereof, an anaerobic tank is communicated with an aerobic tank, and the aeration of the aerobic tank can influence the dissolved oxygen of the anaerobic tank, thereby weakening the dephosphorization effect of the system, and the integrated equipment is complex to start and operate. CN106746378A a solidification high-efficiency microbial film sewage treatment method and equipment, which optimizes the process mode and improves the effluent quality and stability, but the total number of motors is large, and the number of maintenance points is increased. CN106946355A, wherein the sludge reflux and the nitrified liquid reflux are mixed together at the source, the reflux ratio is difficult to control, the denitrification and dephosphorization effect is difficult to ensure, the sludge is easy to block pipelines and ejectors, and the maintenance is difficult; secondly, a fan is needed for aeration, the number of motors is increased, and the manufacturing cost, the energy consumption and the maintenance cost are increased; the reflux point is arranged in the jet aeration tank, and a large amount of dissolved oxygen is brought into the anaerobic tank to destroy the environment of the anaerobic tank. The biochemical treatment is carried out by adopting an activated sludge method, so that the stability of the effluent is difficult to ensure, and especially, the effluent has large water quality fluctuation and needs a large amount of manual maintenance during low-temperature operation in winter and is difficult to discharge after reaching the standard; other patent technologies adopt suspended fillers or jet aeration treatment, but have the characteristics of high manufacturing cost, high energy consumption, low treatment efficiency, difficult maintenance and management and the like, and the improvement is urgently needed. The introduction of the suspended filler has high requirements on the fluidization of the filler, often has high energy consumption or cannot meet the fluidization requirements, and not only can the advantages of the suspended filler not be exerted, but also the stable operation of the system can be influenced.
In order to improve the water environment quality and adapt to the characteristics of the current widely distributed and complex point source pollution of sewage and micro-polluted water, the problems of simplicity, convenience, rapidness and standard reaching of water quality are fundamentally realized, and the improvement on the treatment technology and equipment of the existing integrated water treatment equipment and module is urgently needed.
Disclosure of Invention
Based on the defects in the prior art, the invention provides high-efficiency MBBR integrated sewage treatment equipment and a method, which have good removal effect on low-temperature and micro-polluted water.
The technical solution adopted by the invention is as follows:
an efficient MBBR integrated sewage treatment device comprises a box body, wherein an anoxic tank (Z1), an aerobic tank (Z2), a degassing tank (Z3), a sedimentation tank (Z4), a clean water tank (Z5), a device room (Z6), a comprehensive pump (S1) and a suspension filler (S5) are integrally arranged in the box body;
suspended fillers (S5) are added into the anoxic tank (Z1) and the aerobic tank (Z2), and the bottom of the anoxic tank (Z1) is connected with a water inlet pipe (P14); a Venturi ejector (S2) is arranged in the anoxic pond (Z1); a jet aerator (S3) is arranged in the aerobic tank (Z2);
a first partition plate is arranged between the anoxic tank (Z1) and the aerobic tank (Z2), and an anoxic tank intercepting screen (W1) and an anoxic tank aerobic tank water flowing hole (W2) which are used for communicating the anoxic tank (Z1) and the aerobic tank are arranged on the first partition plate;
A second partition plate is arranged between the aerobic tank (Z2) and the degassing tank (Z3), and an aerobic tank intercepting screen (W3) and an aerobic tank degassing tank water flowing hole (W4) which are used for communicating the two are arranged on the second partition plate;
a third partition plate is arranged between the degassing tank (Z3) and the sedimentation tank (Z4), and a degassing tank sedimentation tank water flowing hole (W5) for communicating the degassing tank with the sedimentation tank is formed in the third partition plate;
a fourth partition plate is arranged between the sedimentation tank (Z4) and the clean water tank (Z5), and a flow water hole (W6) of the sedimentation tank clean water tank for communicating the sedimentation tank (Z4) and the clean water tank is arranged on the fourth partition plate;
the upper part of the clean water tank (Z5) is connected with a water outlet pipe (P15), and the water inlet of the comprehensive pump (S1) is respectively connected with a degassing tank water suction pipe (P5), a sludge discharge pump connecting pipe (P6), a vent pipe (P7) and a clean water tank vent pipe (P8); a water outlet of the comprehensive pump (S1) is respectively connected with a sludge discharge pipe (P1), an aeration return pipe (P2), a nitrifying liquid return pipe (P3) and a nitrifying liquid stirring pipe (P4);
the aeration return pipe (P2) is communicated with the bottom of the aerobic tank (Z2); the nitrifying liquid return pipe (P3) is communicated with the bottom of the anoxic tank (Z1); the nitrified liquid stirring pipe (P4) is communicated with the bottom of the anoxic tank (Z1); the water suction pipe (P5) of the degassing pool is communicated with the lower part of the degassing pool (Z3);
the emptying pipe (P7) is respectively communicated with the bottom of the anoxic tank (Z1), the bottom of the aerobic tank (Z2) and the bottom of the degassing tank (Z3); the clear water tank emptying pipe (P8) is communicated with the bottom of the clear water tank (Z5);
The bottom of the sedimentation tank (Z4) is connected with a sludge suction pipe (P12), and the other end of the sludge suction pipe (P12) is respectively communicated with a sludge discharge pump receiving pipe (P6); the upper part of the sedimentation tank is provided with a water outlet weir (W7) and a water collecting channel (W8);
an integrated pump (S1) is arranged in the equipment room (Z6), and the integrated pump is a water pump.
As a preferable scheme of the invention, the bottom of the aerobic tank (Z2) is also connected with a main aeration pipe (P13), and the aeration return pipe (P2) and the main aeration pipe (P13) are communicated with the bottom of the aerobic tank (Z2) through a jet aerator (S3).
As another preferable scheme of the invention, the bottom of the anoxic pond (Z1) is also connected with a sludge return pipe (P9), and the nitrifying liquid stirring pipe (P4) and the sludge return pipe (P9) are communicated with the bottom of the anoxic pond (Z1) through a Venturi ejector (S2).
Preferably, the main ventilation pipe (P13) is also connected with a branch ventilation pipe (P10), and the other end of the branch ventilation pipe (P10) is communicated with the atmosphere.
Preferably, an air noise reduction filter valve (S4) is provided above the water surface, and one end of the air noise reduction filter valve (S4) is connected with a noise reduction connection pipe (P11), and the other end is communicated with the atmosphere.
Preferably, the water outlet of the venturi ejector (S2) is downward; the nitrified liquid stirring pipe (P4) is communicated with a main water inlet of the Venturi ejector (S2); the sludge return pipe (P9) is communicated with a venturi ejector (S2) side water inlet.
Preferably, the bottom of the anoxic tank (Z1) is provided with slopes from the periphery to the center, and the slopes are 30-60 degrees; the bottom of the sedimentation tank (Z4) is provided with slopes from the periphery to the center, and the slopes are 30-60 degrees.
Preferably, the suspended filler (S5) has a specific gravity of 0.95 to 0.98 and a void fraction > 90%.
Preferably, the anoxic tank interception screen (W1) and the aerobic tank interception screen (W3) are both perforated plates or grid bars, the diameter of the holes of the perforated plates is smaller than that of the suspended filler, and the gaps between the grid bars are smaller than the thickness of the suspended filler; the anaerobic tank intercepting screen (W1) and the aerobic tank flow water hole (W2) of the anaerobic tank are installed at the same height, the upper edge is 30cm below the operating water level, and the lower edge is higher than half of the operating water level; the installation height of the aerobic tank interception screen (W3) and the installation height of the aerobic tank degassing tank water flowing hole (W4) are the same, the upper edge is 30cm below the operating water level, and the lower edge is higher than half of the operating water level; the operating water level is the same as the mounting height of the lower edge of the water outlet pipe (P15); the installation height of the center of the jet aerator (S3) is 20-60cm above the bottom of the tank; the installation height of the lower edge of the Venturi ejector (S2) is 20-60cm above the pool bottom.
Preferably, valves are arranged on the sludge discharge pipe (P1), the aeration return pipe (P2), the nitrified liquid return pipe (P3), the nitrified liquid stirring pipe (P4), the degassing tank water suction pipe (P5), the sludge discharge pump connecting pipe (P6), the emptying pipe (P7), the clean water tank emptying pipe (P8), the sludge return pipe (P9), the ventilation branch pipe (P10), the silencer connecting pipe (P11), the sludge suction pipe (P12), the ventilation main pipe (P13), the water inlet pipe (P14) and the water outlet pipe (P15).
A high-efficiency MBBR integrated sewage treatment method adopts treatment equipment comprising a box body, an anoxic tank (Z1), an aerobic tank (Z2), a degassing tank (Z3), a sedimentation tank (Z4), a clean water tank (Z5), an equipment room (Z6), a comprehensive pump (S1), a process pipeline, process pipe fittings and a suspension filler (S5), wherein the anoxic tank, the aerobic tank, the degassing tank, the sedimentation tank, the clean water tank, the equipment room (Z6), the comprehensive pump, the process pipeline, the process pipe fittings and the suspension filler are positioned in the box body;
the process pipeline comprises a sludge discharge pipe (P1), an aeration return pipe (P2), a nitrified liquid return pipe (P3), a nitrified liquid stirring pipe (P4), a degassing pool water suction pipe (P5), a sludge discharge pump connecting pipe (P6), a vent pipe (P7), a clean water pool vent pipe (P8), a sludge return pipe (P9), a ventilation branch pipe (P10), a silencer connecting pipe (P11), a sludge suction pipe (P12), a ventilation main pipe (P13), a water inlet pipe (P14) and a water outlet pipe (P15);
the process piping comprises a venturi ejector (S2), a jet aerator (S3), an air silencing filter valve (S4);
suspended fillers (S5) are added into the anoxic tank (Z1) and the aerobic tank (Z2); the water inlet pipe (P14) is communicated with the bottom of the anoxic tank (Z1); a first partition plate is arranged between the anoxic tank (Z1) and the aerobic tank (Z2) and is communicated with a water flow hole (W2) of the aerobic tank of the anoxic tank through an anoxic tank interception screen (W1);
a second partition plate is arranged between the aerobic tank (Z2) and the degassing tank (Z3) and is communicated with a water flowing hole (W4) of the degassing tank of the aerobic tank through an aerobic tank interception screen (W3); a third partition plate is arranged between the degassing tank (Z3) and the sedimentation tank (Z4) and is communicated with the sedimentation tank through a water flowing hole (W5) of the degassing tank; a fourth partition plate is arranged between the sedimentation tank (Z4) and the clean water tank (Z5), and is communicated with the water flowing hole (W6) only through the sedimentation tank clean water tank; the water outlet pipe (P15) is communicated with the upper part of the clean water tank (Z5); the water inlet of the comprehensive pump (S1) is respectively communicated with a degassing pool water suction pipe (P5), a sludge discharge pump connecting pipe (P6), a vent pipe (P7) and a clean water pool vent pipe (P8); the water outlet of the comprehensive pump (S1) is respectively communicated with a sludge discharge pipe (P1), an aeration return pipe (P2), a nitrifying liquid return pipe (P3) and a nitrifying liquid stirring pipe (P4); the aeration return pipe (P2) and the aeration main pipe (P13) are communicated with the bottom of the aerobic tank (Z2) through a jet aerator (S3); a nitrifying liquid return pipe (P3) is communicated with the bottom of the anoxic tank (Z1); the nitrifying liquid stirring pipe (P4) and the sludge return pipe (P9) are communicated with the bottom of the anoxic tank (Z1) through a Venturi ejector (S2); the degassing tank water suction pipe (P5) is communicated with the degassing tank (Z3); the emptying pipe (P7) is respectively communicated with the bottom of the anoxic tank (Z1), the bottom of the aerobic tank (Z2) and the bottom of the degassing tank (Z3); the clear water tank emptying pipe (P8) is communicated with the bottom of the clear water tank (Z5); one end of the vent branch pipe (P10) is communicated with the vent main pipe (P13), and the other end is communicated with the atmosphere; one end of the air silencing filter valve (S4) is communicated with the silencer connecting pipe (P11), and the other end is communicated with the atmosphere; one end of the sludge suction pipe (P12) is communicated with the bottom of the sedimentation tank (Z4), and the other end is respectively communicated with the sludge discharge pump pipe (P6) and the sludge return pipe (P9); the integrated pump (S1) is arranged in the equipment room (Z6); a venturi eductor (S2) disposed within the anoxic tank (Z1); the jet aerator (S3) is arranged in the aerobic tank (Z2); the air silencing filter valve (S4) is arranged above the water surface and communicated with the atmosphere; the upper part of the sedimentation tank is provided with a water outlet weir (W7) and a water collecting channel (W8); in the equipment room, a sludge discharge pipe (P1), an aeration return pipe (P2), a nitrified liquid return pipe (P3), a nitrified liquid stirring pipe (P4), a degassing pool water suction pipe (P5), a sludge discharge pump connecting pipe (P6), an emptying pipe (P7), a clear water pool emptying pipe (P8), a sludge return pipe (P9), a ventilation branch pipe (P10) and a silencer connecting pipe (P11) are respectively provided with a valve sludge discharge pipe valve (F1), an aeration return pipe valve (F2), a nitrified liquid return pipe valve (F3), a nitrified liquid stirring pipe valve (F4), a degassing pool water suction pipe valve (F5), a sludge discharge pump connecting pipe valve (F6), an emptying pipe valve (F7), a clear water pool emptying pipe valve (F8), a sludge return pipe valve (F9), a ventilation branch pipe valve (F10) and a silencer connecting pipe valve (F11);
The processing method comprises the following steps:
the method comprises the following steps of firstly, starting, controlling all valves to be in a closed state, and controlling a comprehensive pump (S1) to be in a closed state; filling suspended fillers, inoculating activated sludge, and feeding water into the equipment to an operating water level;
secondly, water is fed, all valves are controlled to be in a closed state, and the comprehensive pump (S1) is controlled to be in a closed state; opening a water suction pipe valve (F5) of the degassing tank, an aeration return pipe valve (F2), a nitrifying liquid return pipe valve (F3), a nitrifying liquid stirring pipe valve (F4), a sludge return pipe valve (F9) and a silencer connecting pipe valve (F11), and then opening a comprehensive pump (S1); sewage passes through an anoxic tank (Z1), an aerobic tank (Z2), a degassing tank (Z3), a sedimentation tank (Z4) and a clean water tank (Z5) in sequence from a water inlet pipe (P14), and is discharged from a water outlet pipe (P15);
thirdly, controlling, namely adjusting the opening degree of a valve (F2) of an aeration return pipe and a valve (F11) of a silencer connecting pipe, and controlling DO and stirring intensity in the aerobic tank; adjusting a nitrifying liquid reflux pipe valve (F3) and a nitrifying liquid stirring pipe valve (F4) to control the reflux amount of the nitrifying liquid and the stirring strength of the anoxic tank; adjusting a nitrifying liquid stirring pipe valve (F4) and a sludge return pipe valve (F9) to control the sludge return amount;
fourthly, discharging mud, controlling all valves to be in a closed state, and controlling the comprehensive pump (S1) to be in a closed state; opening a sludge discharge pump pipe valve (F6) and a sludge discharge pipe valve (F1); then the integrated pump is started (S1); sludge is discharged from the bottom of the sedimentation tank (Z4) through a sludge suction pipe (P12), a sludge discharge pump pipe (P6), a comprehensive pump (S1) and a sludge discharge pipe (P1);
Fifthly, emptying, controlling all valves to be in a closed state, and controlling the comprehensive pump (S1) to be in a closed state; only opening an emptying pipe valve (F7) and a sludge discharge pipe valve (F1), then opening a comprehensive pump (S1), discharging muddy water in an anoxic pond (Z1), an aerobic pond (Z2) and a degassing pond (Z3) through the emptying pipe, the comprehensive pump and a sludge discharge pipe, and closing the comprehensive pump (S1) and all valves after emptying; only opening a sludge discharge pump pipe valve (F6) and a sludge discharge pipe valve (F1), and then opening the comprehensive pump (S1); the mud water in the sedimentation tank (Z4) is discharged through a mud suction pipe (P12), a mud discharging pump connecting pipe (P6), a comprehensive pump (S1) and a mud discharging pipe (P1), and the comprehensive pump (S1) and all valves are closed after the mud water is discharged; and (3) only opening a clean water tank emptying pipe valve (F8) and a sludge discharge pipe valve (F1), then opening the comprehensive pump (S1), discharging water in the clean water tank (Z6) through the clean water tank emptying pipe, the comprehensive pump and the sludge discharge pipe, and closing the comprehensive pump (S1) and all valves after emptying.
Compared with the prior art, the invention has the following beneficial technical effects:
1) equipment integration, equipment maintenance is simple: the functions of aeration, stirring, backflow and sludge discharge are completed by only one comprehensive pump, so that the failure rate of the equipment is greatly reduced, the maintenance is basically not needed, the power of the integrated equipment is relatively improved, and the model selection is easy;
2) Energy conservation: only one comprehensive pump is used, so that the pump can be operated in a high-efficiency area, and compared with integrated equipment of an activated sludge method, the energy can be saved by 30-50%;
3) the treatment effect is good: the shock resistance and the recovery capability are strong, 2-3 times of those of the traditional activated sludge, and the activated sludge has good removal effect on low-temperature and micro-polluted water;
4) high load and small occupied area: active polymer suspended filler is added into the equipment, the removal load of pollutants is 2-3 times of that of the traditional activated sludge, jet aeration is adopted, the oxygen utilization rate is 2-3 times of that of the traditional aeration mode, and therefore the load is high; the equipment size required correspondingly to high load is reduced, the modular and standardized design is adopted, the equipment structure is more compact, and the floor area is 1/2-1/3 of the traditional method;
5) the cost is low: the size of the equipment is reduced, the required materials are correspondingly reduced, only one comprehensive pump is electromechanical, the equipment does not comprise a fan and a stirrer, the manufacturing cost is greatly saved, the comprehensive pump (S1) is arranged to replace the fan, the stirrer, a reflux pump and a sludge discharge pump in the traditional equipment, the integration of electromechanical equipment is realized, the maintenance and the management are convenient, and the energy consumption is reduced; the equipment has the advantages of simple operation method, small number of motors, low operation energy consumption, prolonged service life and reduced maintenance cost and operation cost.
Drawings
The invention is further described with reference to the accompanying drawings:
FIG. 1 is a front elevation view of an integrated high-efficiency MBBR sewage treatment plant;
FIG. 2 is a top view of the high-efficiency MBBR integrated sewage treatment equipment.
In the figure: anoxic tank-Z1, aerobic tank-Z2, degassing tank-Z3, sedimentation tank-Z4, clean water tank-Z5, plant room-Z6, integrated pump-S1, Venturi ejector-S2, butterfly jet aerator-S3, air silencing filter valve-S4, suspended filler-S5, sludge discharge pipe-P1, aeration return pipe-P2, nitrifying liquid return pipe-P3, nitrifying liquid stirring pipe-P4, degassing tank water suction pipe-P5, sludge discharge pump pipe-P6, emptying pipe-P7, clean water tank emptying pipe-P8, sludge return pipe-P9, aeration branch pipe-P10, aeration muffler connecting pipe-P11, sludge suction pipe-P12, aeration main pipe-P13, water inlet pipe-P14, water outlet pipe-P15, anoxic tank intercepting screen-W1, aerobic tank water hole-W2, the device comprises an aerobic tank intercepting screen-W3, an aerobic tank degassing tank water passing hole-W4, a degassing tank sedimentation tank water passing hole-W5, a sedimentation tank clean water tank water passing hole communicated-W6, a mud discharge pipe valve-F1, an aeration return pipe valve-F2, a nitrified liquid return pipe valve-F3, a nitrified liquid stirring pipe valve-F4, a degassing tank water suction pipe valve-F5, a mud discharge pump pipe valve-F6, a blow-down pipe valve-F7, a clean water tank blow-down pipe valve-F8, a sludge return pipe valve-F9, a vent branch pipe valve-F10 and a silencer connecting pipe valve-F11.
Detailed Description
The invention provides high-efficiency MBBR integrated sewage treatment equipment and a method, and in order to make the advantages and technical scheme of the invention clearer and clearer, the invention is further described in detail by combining specific embodiments.
The invention relates to high-efficiency MBBR (moving bed biofilm reactor) integrated sewage treatment equipment and a method, which can solve the problems of unstable treatment effect, excessive equipment, inconvenience in maintenance and the like of the conventional integrated equipment and are particularly suitable for treating distributed point source pollution. Through the setting of synthesizing the pump, adopt single power equipment, realize functions such as stirring, backward flow, aeration, row's mud, unloading, make full use of venturi principle utilizes rivers through venturi, produces the negative pressure, and the suction realizes mud backward flow, row's mud, aeration etc. also utilizes rivers to play the stirring effect simultaneously.
The invention discloses high-efficiency MBBR integrated sewage treatment equipment, which is shown by combining a figure 1 and a figure 2 and comprises a box body, and an anoxic tank Z1, an aerobic tank Z2, a degassing tank Z3, a sedimentation tank Z4, a clean water tank Z5, an equipment room Z6, a comprehensive pump S1, a process pipeline, process pipe fittings and a suspension filler S5 which are positioned in the box body.
The process pipeline comprises a sludge discharge pipe P1, an aeration return pipe P2, a nitrified liquid return pipe P3, a nitrified liquid stirring pipe P4, a degassing pool water suction pipe P5, a sludge discharge pump connecting pipe P6, an emptying pipe P7, a clean water pool emptying pipe P8, a sludge return pipe P9, a ventilation branch pipe P10, a silencer connecting pipe P11, a sludge suction pipe P12, a ventilation main pipe P13, a water inlet pipe P14 and a water outlet pipe P15.
The process pipe fitting comprises a Venturi ejector S2, a jet aerator S3 and an air silencing filter valve S4;
suspended fillers S5 are added into the anoxic tank Z1 and the aerobic tank Z2; the water inlet pipe P14 is communicated with the bottom of the anoxic tank Z1; a first partition plate is arranged between the anoxic tank Z1 and the aerobic tank Z2 and is communicated with a water flow hole W2 of the aerobic tank of the anoxic tank only through an anoxic tank interception screen W1;
a second partition plate is arranged between the aerobic tank Z2 and the degassing tank Z3 and is communicated with the flow water hole W4 of the degassing tank of the aerobic tank only through an aerobic tank interception screen W3; a third partition plate is arranged between the degassing tank Z3 and the sedimentation tank Z4 and is communicated with the sedimentation tank through a water flow hole W5 of the degassing tank; a fourth partition plate is arranged between the sedimentation tank Z4 and the clean water tank Z5, and is communicated with the W6 only through a water flowing hole of the sedimentation tank clean water tank; the water outlet pipe P15 is communicated with the upper part of the clean water tank Z5; the water inlet of the comprehensive pump S1 is respectively communicated with a degassing pool water suction pipe P5, a sludge discharge pump receiving pipe P6, a vent pipe P7 and a clean water pool vent pipe P8; the water outlet of the comprehensive pump S1 is respectively communicated with a sludge discharge pipe P1, an aeration return pipe P2, a nitrifying liquid return pipe P3 and a nitrifying liquid stirring pipe P4; the aeration return pipe P2 and the main aeration pipe P13 are communicated with the bottom of the aerobic tank Z2 through a jet aerator S3; a nitrifying liquid return pipe P3 is communicated with the bottom of the anoxic tank Z1; the nitrifying liquid stirring pipe P4 and the sludge return pipe P9 are communicated with the bottom of the anoxic tank Z1 through a Venturi ejector S2; the degassing pool water suction pipe P5 is communicated with a degassing pool Z3; the emptying pipe P7 is respectively communicated with the bottom of the anoxic tank Z1, the bottom of the aerobic tank Z2 and the bottom of the degassing tank Z3; the emptying pipe P8 of the clean water tank is communicated with the bottom of the clean water tank Z5; one end of the vent branch pipe P10 is communicated with the vent main pipe P13, and the other end is communicated with the atmosphere; one end of the air silencing filter valve S4 is communicated with the silencer connecting pipe P11, and the other end is communicated with the atmosphere; one end of a sludge suction pipe P12 is communicated with the bottom of the sedimentation tank Z4, and the other end is respectively communicated with a sludge discharge pump pipe P6 and a sludge return pipe P9; the comprehensive pump S1 is arranged in the equipment room Z6; a venturi eductor S2 is disposed within the anoxic bath Z1; the jet aerator S3 is arranged in the aerobic tank Z2; the air silencing filter valve S4 is arranged above the water surface and communicated with the atmosphere; the upper part of the sedimentation tank is provided with a water outlet weir W7 and a water collecting channel W8; in the equipment room, a sludge discharge pipe P1, an aeration return pipe P2, a nitrified liquid return pipe P3, a nitrified liquid stirring pipe P4, a degassing pool water suction pipe P5, a sludge discharge pump connecting pipe P6, an emptying pipe P7, a clear water pool emptying pipe P8, a sludge return pipe P9, a ventilation branch pipe P10 and a silencer connecting pipe P11 are respectively provided with a valve sludge discharge pipe valve F1, an aeration return pipe valve F2, a nitrified liquid return pipe valve F3, a nitrified liquid stirring pipe valve F4, a degassing pool water suction pipe valve F5, a sludge discharge pump connecting pipe valve F6, an emptying pipe valve F7, a clear water pool emptying pipe valve F8, a sludge return pipe valve F9, a ventilation branch pipe valve F10 and a silencer connecting pipe valve F11; the equipment room Z6 is not communicated with the adjacent degassing pool Z3, the sedimentation pool Z4 and the clean water pool Z5.
The bottom of the preferred anoxic pond Z1 is provided with slopes from the periphery to the center, and the slopes are 30-60 degrees; the bottom of the sedimentation tank Z4 is provided with a slope from the periphery to the center, and the slope is 30-60 degrees.
According to the invention, the anaerobic tank intercepting screen and the aerobic tank intercepting screen are preferably perforated plates or grid bars, the diameter of the opening of each perforated plate is smaller than that of the suspended filler, and the gap between the grid bars is smaller than the thickness of the suspended filler; the mounting height of the anoxic tank intercepting screen and the flow water hole of the anoxic tank aerobic tank is the same, the upper edge of the anoxic tank intercepting screen is 30cm below the operating water level, and the lower edge of the anoxic tank intercepting screen is higher than half of the operating water level; the installation height of the aerobic tank intercepting screen and the installation height of the aerobic tank degassing tank water flowing hole are the same, the upper edge is 30cm below the operating water level, and the lower edge is higher than half of the operating water level; the installation height of the center of the jet aerator is 20-60cm above the bottom of the tank; the lower edge of the Venturi ejector is arranged 20-60cm above the pool bottom.
The void fraction of the suspended filler is defined as the percentage of the volume of voids per unit of suspended carrier filler to the total volume.
Above-mentioned integral type box structure, box main part material can be multiple materials such as stainless steel, carbon steel, glass steel or engineering plastics, selects by oneself according to the operation requirement.
As well known by persons skilled in the art, the Venturi ejector is based on the Venturi principle, sludge in a sedimentation tank is sucked by utilizing the vacuum pumping action of pressure water flow between a nozzle and a throat pipe, and is mixed with nitrifying liquid and sprayed into water, so that the effects of nitrifying liquid backflow, sludge backflow and hydraulic stirring are integrated, the sludge suction negative pressure is 0.04MPa to 0.08MPa, the ratio of the sucked sludge to the nitrifying liquid is 0.5 to 2, and the negative pressure and the ratio are determined according to the liquid level depths of different tank shapes and different water qualities and sludge concentrations.
As well known by people in the industry, the butterfly jet aerator is based on the Venturi principle, sucks air by utilizing the vacuumizing action of pressure water flow between a nozzle and a throat pipe, mixes water and gas by the residual pressure of water, and sprays the mixture into water, wherein the oxygen utilization rate is 20-40 percent, is much higher than that of the traditional perforation aeration (10 percent oxygen utilization rate) and micropore aeration (15 percent oxygen utilization rate), and saves energy consumption; the negative pressure of the sucked air is 0.02MPa-0.06MPa, the volume ratio of the sucked air to the sucked water is 1:1-4:1, and the negative pressure is determined according to the liquid level depths of different pool shapes and different water qualities.
As well known to those skilled in the art, all the valves can be selected from manual valves or electric valves, and are matched with a PLC to realize automatic control.
As is well known to those skilled in the art, the integrated pump is a water pump, and a variable frequency water pump or a fixed frequency water pump can be selected.
As well known by persons in the industry, the tank capacity and the adding amount of suspended fillers in the integrated sewage treatment equipment are determined according to the water quantity, the water quality and the treatment standard; the nitrification liquid reflux ratio, the sludge reflux ratio and the aerobic tank DO meet the basic requirements of the system on sewage treatment.
Example 1:
The invention discloses a high-efficiency MBBR integrated sewage treatment method, which depends on the equipment and comprises the following steps:
step I, starting, controlling all valves to be in a closed state, and controlling the comprehensive pump S1 to be in a closed state; filling suspended fillers, inoculating activated sludge, and feeding water into the equipment to an operating water level;
step II, water is fed, all valves are controlled to be in a closed state, and the comprehensive pump S1 is controlled to be in a closed state; opening a water suction pipe valve F5, an aeration return pipe valve F2, a nitrifying liquid return pipe valve F3, a nitrifying liquid stirring pipe valve F4, a sludge return pipe valve F9 and a silencer connecting pipe valve F11 of the degassing tank, and then opening a comprehensive pump S1; sewage passes through an anoxic tank Z1, an aerobic tank Z2, a degassing tank Z3, a sedimentation tank Z4 and a clean water tank Z5 in sequence from a water inlet pipe P14, and is discharged from a water outlet pipe P15;
step III, controlling, namely adjusting the opening degree of a valve F2 of the aeration return pipe and a valve F11 of a connecting pipe of a silencer, and controlling DO and stirring intensity in the aerobic tank; adjusting a nitrifying liquid return pipe valve F3 and a nitrifying liquid stirring pipe valve F4 to control the return flow rate of the nitrifying liquid and the stirring strength of the anoxic tank; adjusting a nitrifying liquid stirring pipe valve F4 and a sludge return pipe valve F9 to control the sludge return amount;
Step IV, discharging sludge, controlling all valves to be in a closed state, and controlling the comprehensive pump S1 to be in a closed state; opening a sludge discharge pump pipe valve F6 and a sludge discharge pipe valve F1; then the integrated pump is started S1; sludge is discharged from the bottom of the sedimentation tank Z4 through a sludge suction pipe P12, a sludge discharge pump receiving pipe P6, a comprehensive pump S1 and a sludge discharge pipe P1;
step V, emptying, controlling all valves to be in a closed state, and controlling the comprehensive pump S1 to be in a closed state; only opening an emptying pipe valve F7 and a sludge discharge pipe valve F1, then opening a comprehensive pump S1, discharging the sludge water in the anoxic tank Z1, the aerobic tank Z2 and the degassing tank Z3 through the emptying pipe, the comprehensive pump and a sludge discharge pipe, and closing the comprehensive pump S1 and all valves after emptying; only opening a sludge discharge pump pipe valve F6 and a sludge discharge pipe valve F1, and then opening a comprehensive pump S1; the Z4 mud water of the sedimentation tank is discharged through a mud suction pipe P12, a mud discharging pump connecting pipe P6, a comprehensive pump S1 and a mud discharging pipe P1, and the comprehensive pump S1 and all valves are closed after the mud is discharged; and only opening a clean water tank emptying pipe valve F8 and a sludge discharge pipe valve F1, then opening the comprehensive pump S1, discharging water in the clean water tank Z6 through the clean water tank emptying pipe, the comprehensive pump and the sludge discharge pipe, and closing the comprehensive pump S1 and all valves after emptying.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
Although terms such as degassing tank, integrated pump, mud dump line, etc. are used more often herein, the possibility of using other terms is not excluded, and simple substitutions of these terms by those skilled in the art in light of the present disclosure are intended to be within the scope of the present disclosure.
Claims (6)
1. The utility model provides a high-efficient MBBR integration sewage treatment device, its includes a box, its characterized in that: an anoxic tank (Z1), an aerobic tank (Z2), a degassing tank (Z3), a sedimentation tank (Z4), a clean water tank (Z5), an equipment room (Z6), a comprehensive pump (S1) and a suspension filler (S5) are integrally arranged in the box body;
suspended fillers (S5) are added into the anoxic tank (Z1) and the aerobic tank (Z2), and the bottom of the anoxic tank (Z1) is connected with a water inlet pipe (P14); a Venturi ejector (S2) is arranged in the anoxic pond (Z1); a jet aerator (S3) is arranged in the aerobic tank (Z2);
a first partition plate is arranged between the anoxic tank (Z1) and the aerobic tank (Z2), and an anoxic tank intercepting screen (W1) and an anoxic tank aerobic tank water flowing hole (W2) which are used for communicating the anoxic tank (Z1) and the aerobic tank are arranged on the first partition plate;
a second partition plate is arranged between the aerobic tank (Z2) and the degassing tank (Z3), and an aerobic tank intercepting screen (W3) and an aerobic tank degassing tank water flowing hole (W4) which are used for communicating the two are arranged on the second partition plate;
A third partition plate is arranged between the degassing tank (Z3) and the sedimentation tank (Z4), and a degassing tank sedimentation tank water flow hole (W5) for communicating the degassing tank with the sedimentation tank is formed in the third partition plate;
a fourth partition plate is arranged between the sedimentation tank (Z4) and the clean water tank (Z5), and a flow water hole (W6) of the clean water tank of the sedimentation tank is arranged on the fourth partition plate and is used for communicating the sedimentation tank with the clean water tank;
the upper part of the clean water tank (Z5) is connected with a water outlet pipe (P15), and the water inlet of the comprehensive pump (S1) is respectively connected with a degassing tank water suction pipe (P5), a sludge discharge pump connecting pipe (P6), a vent pipe (P7) and a clean water tank vent pipe (P8); a water outlet of the comprehensive pump (S1) is respectively connected with a sludge discharge pipe (P1), an aeration return pipe (P2), a nitrifying liquid return pipe (P3) and a nitrifying liquid stirring pipe (P4);
the aeration return pipe (P2) is communicated with the bottom of the aerobic tank (Z2); the nitrifying liquid return pipe (P3) is communicated with the bottom of the anoxic tank (Z1); the nitrified liquid stirring pipe (P4) is communicated with the bottom of the anoxic tank (Z1); the water suction pipe (P5) of the degassing pool is communicated with the lower part of the degassing pool (Z3);
the emptying pipe (P7) is respectively communicated with the bottom of the anoxic tank (Z1), the bottom of the aerobic tank (Z2) and the bottom of the degassing tank (Z3); the emptying pipe (P8) of the clean water tank is communicated with the bottom of the clean water tank (Z5);
the bottom of the sedimentation tank (Z4) is connected with a sludge suction pipe (P12), and the other end of the sludge suction pipe (P12) is respectively communicated with a sludge discharge pump pipe (P6); the upper part of the sedimentation tank is provided with a water outlet weir (W7) and a water collecting channel (W8);
The integrated pump (S1) is arranged in the equipment room (Z6), and is a water pump;
the bottom of the aerobic tank (Z2) is also connected with a main aeration pipe (P13), and the aeration return pipe (P2) and the main aeration pipe (P13) are communicated with the bottom of the aerobic tank (Z2) through a jet aerator (S3);
the bottom of the anoxic tank (Z1) is also connected with a sludge return pipe (P9), and the nitrified liquid stirring pipe (P4) and the sludge return pipe (P9) are communicated with the bottom of the anoxic tank (Z1) through a Venturi ejector (S2);
the water outlet of the Venturi ejector (S2) faces downwards; the nitrified liquid stirring pipe (P4) is communicated with a main water inlet of the Venturi ejector (S2); the sludge return pipe (P9) is communicated with a side water inlet of the Venturi ejector (S2);
the anoxic tank intercepting screen (W1) and the aerobic tank intercepting screen (W3) are both perforated plates or grid bars, the diameter of the opening of each perforated plate is smaller than that of the suspended filler, and the gap between the grid bars is smaller than the thickness of the suspended filler; the anaerobic tank intercepting screen (W1) and the aerobic tank water-flowing hole (W2) of the anaerobic tank are installed at the same height, the upper edge is 30cm below the running water level, and the lower edge is higher than half of the running water level; the installation height of the aerobic tank interception screen (W3) and the installation height of the aerobic tank degassing tank water flowing hole (W4) are the same, the upper edge is 30cm below the operating water level, and the lower edge is higher than half of the operating water level; the operating water level is the same as the installation height of the lower edge of the water outlet pipe (P15); the installation height of the center of the jet aerator (S3) is 20-60cm above the bottom of the tank; the installation height of the lower edge of the Venturi ejector (S2) is 20-60cm above the pool bottom.
2. The integrated sewage treatment equipment of high efficiency MBBR of claim 1, which is characterized in that: the main ventilation pipe (P13) is also connected with a branch ventilation pipe (P10), and the other end of the branch ventilation pipe (P10) is communicated with the atmosphere.
3. The integrated sewage treatment equipment of high efficiency MBBR of claim 1, which is characterized in that: an air silencing filter valve (S4) is arranged above the water surface, one end of the air silencing filter valve (S4) is connected with a silencer connecting pipe (P11), and the other end of the air silencing filter valve is communicated with the atmosphere.
4. The integrated sewage treatment equipment of high efficiency MBBR of claim 1, which is characterized in that: the bottom of the anoxic tank (Z1) is provided with slopes from the periphery to the center, and the slopes are 30-60 degrees; the bottom of the sedimentation tank (Z4) is provided with slopes from the periphery to the center, and the slopes are 30-60 degrees.
5. The high-efficiency MBBR integrated sewage treatment equipment according to claim 1, wherein: the suspended filler (S5) has a specific gravity of 0.95-0.98 and a void fraction of > 90%.
6. The high-efficiency MBBR integrated sewage treatment equipment according to claim 2, wherein: the device is characterized in that valves are arranged on the sludge discharge pipe (P1), the aeration return pipe (P2), the nitrified liquid return pipe (P3), the nitrified liquid stirring pipe (P4), the degassing pool water suction pipe (P5), the sludge discharge pump connecting pipe (P6), the emptying pipe (P7), the clean water pool emptying pipe (P8), the sludge return pipe (P9), the ventilation branch pipe (P10), the silencer connecting pipe (P11), the sludge suction pipe (P12), the ventilation main pipe (P13), the water inlet pipe (P14) and the water outlet pipe (P15).
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| CN111072180A (en) * | 2019-12-30 | 2020-04-28 | 利晟（杭州）科技有限公司 | Jet aeration and stirring integrated sewage treatment device and method |
| CN111410309A (en) * | 2020-03-03 | 2020-07-14 | 广东新会中集特种运输设备有限公司 | MBBR integration sewage treatment device |
| CN112759082A (en) * | 2021-01-11 | 2021-05-07 | 凌志环保（临泉）有限公司 | Household appliance type purifier for treating rural domestic sewage |
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