CN209292062U - Device for rapid treatment of high-concentration organic wastewater by continuous back-fraction activated sludge - Google Patents

Abstract

The utility model is a device for rapid treatment of high-concentration organic wastewater by continuous back-separation activated sludge, which includes a primary sedimentation tank, an aerobic biochemical reaction device and a secondary sedimentation tank connected in sequence; a feeder is connected to the aerobic biochemical reaction device The feeding part is used to add enzyme to the aerobic biochemical reaction device; the supernatant outlet of the secondary sedimentation tank is connected to a filter device through a pipeline. The device occupies a small area, is simple to operate, has short treatment time, has no odor in the sewage treatment site, is environmentally friendly, stable and reliable in operation, low in investment and operation costs, and can classify and use the treated sewage according to actual needs, with strong flexibility.

Description

Device for rapid treatment of high-concentration organic wastewater by continuous back-fraction activated sludge

technical field

The utility model belongs to the field of sewage treatment equipment, and in particular relates to a device for rapid treatment of high-concentration organic waste water by continuous fractionation activated sludge.

Background technique

With the rapid development of the farming industry in rural areas, while increasing agricultural income, the pollution in rural areas is increasing, especially the pollution of high-concentration organic wastewater such as poultry and livestock manure. The treatment of high-concentration organic wastewater is a difficult problem in the field of sewage treatment. The most widely used and most economical method for sewage treatment is biological treatment. It has experienced nearly a hundred years of evolution and changes, and has become the most critical technology for environmental pollution control. Biological treatment devices that match the existing biological treatment methods generally use at least two combined devices from aerobic pools, transitional pools, anaerobic pools, and anaerobic pools to treat sewage. The equipment investment is high, the floor area is large, and the system is complicated. 1. Management is difficult. Therefore, it is particularly important to develop and operate equipment that is convenient for operation and management and has high treatment efficiency for high-concentration organic wastewater, so as to alleviate the environmental protection pressure of breeding owners and improve the sustainable development of livestock and poultry breeding.

Utility model content

In order to solve the technical problems of traditional high-concentration sewage treatment equipment such as complexity, large floor space, high investment, and difficult management, the utility model provides a device for rapid treatment of high-concentration organic wastewater by continuous fractionation activated sludge.

The utility model is realized through the following technical solutions:

A device for rapid treatment of high-concentration organic wastewater by continuous back-separation activated sludge, comprising a primary sedimentation tank, an aerobic biochemical reaction device, and a secondary sedimentation tank connected in sequence; a feeding part is connected to the aerobic biochemical reaction device, and the The feeding part is used for feeding enzyme into the aerobic biochemical reaction device; the supernatant outlet of the secondary sedimentation tank is connected with a filter device through a pipeline.

The device for rapid treatment of high-concentration organic wastewater by continuous back-separation activated sludge also includes an intermediate liquid tank connected to the supernatant outlet of the aerobic biochemical reaction device, and connected with the primary sedimentation tank, the aerobic biochemical reaction device and the secondary tank respectively. The sedimentation tank is connected to the sludge tank through the sludge output pipeline, and the supernatant liquid outlet of the sludge tank is returned to the aerobic biochemical reaction device through the pipeline.

The aerobic biochemical reaction device includes n aeration tanks connected in series in sequence, and the feeding part is connected with the feed port of the first aeration tank; each aeration tank is provided with a liquid inlet and a liquid outlet; The liquid outlet on the n aeration tank is connected to the liquid inlet on the secondary sedimentation tank, and the liquid outlet pipeline connected to the intermediate liquid tank is provided on the second aeration tank - the nth aeration tank; The mud outlet on the secondary sedimentation tank is connected to the liquid inlet of the first aeration tank through the mud outlet pipeline.

The supernatant outlet of the sludge tank is connected to the liquid inlet of the first aeration tank through a pipeline.

The filter device includes a recovery tank, the liquid inlet of the recovery tank is connected with the supernatant outlet of the secondary sedimentation tank through pipelines, and several membrane modules are supported by brackets in the recovery tank, and the water outlets of the membrane modules are connected to each other and passed through The pipeline is connected to the inlet of the self-priming pump located outside the recovery tank; the sludge discharge side of the membrane module is connected to the inlet of the return pump located at the bottom of the recovery tank through the pipeline, and the outlet of the return pump is connected to the aerobic biochemical reaction device through the pipeline; Several aeration pipes are arranged on the bottom surface of the recovery tank below the membrane module, and the aeration tubes are connected to the blower outside the recovery tank through the gas transmission pipeline; the overflow pipeline is connected between the recovery tank and the secondary sedimentation tank.

The pore diameter of the filter membrane of the membrane module is 0.1-0.4 μm.

The feeding part is a feeding pipe connected with the feed port of the first aeration tank.

The beneficial effects of the utility model are:

1. The device for the rapid treatment of high-concentration organic wastewater by continuous separation of activated sludge of the present invention adopts a primary sedimentation tank, a secondary sedimentation tank, an aeration tank arranged in series between the primary sedimentation tank and the secondary sedimentation tank, and an intermediate liquid Pool and filter device, high treatment efficiency, small footprint, simple operation, short cycle, no odor in sewage treatment site, environment-friendly, stable and reliable operation, low investment and operating costs, flexible process.

2. The aeration tanks of the device for rapid treatment of high-concentration organic wastewater by continuous back-separation activated sludge of the utility model not only operate in series according to the passages connected in sequence of each aeration tank, but also can discharge the supernatant separately to achieve different effluents The purpose of water quality and usage requirements is to drain water from the aeration tank and other pools to realize the discharge of liquid fertilizer and standard water, with strong flexibility.

3. The membrane module of the filtration device in the device for rapid treatment of high-concentration organic wastewater in the continuous back-fraction activated sludge device of the present utility model is set. A sewage treatment cycle process realizes the reuse of enzymes and saves costs.

4. The device for rapid treatment of high-concentration organic wastewater by continuous back-fraction activated sludge of the utility model can be equipped with 3-5 (level) aeration tanks according to the types and requirements of the sewage treatment, and each aeration tank is connected in series in turn. After cyclic treatment, the high-concentration organic sewage can be discharged up to the standard water.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the filtering device in Fig. 1 .

In the figure, 1 primary sedimentation tank, 2 aerobic biochemical reaction device, 2.1 first aeration tank, 2.2 second aeration tank, 2.n nth aeration tank, 3 secondary sedimentation tank, 4 feeding parts, 5 filtration Device, 6 intermediate liquid tank, 7 sludge tank, 8 liquid outlet pipeline, 9 sludge discharge pipeline, 10 mud outlet pipeline, 11 clear water tank, 12 overflow pipeline, 13 recovery tank, 14 membrane module, 15 automatic Suction pump, 16 return pump, 17 aeration pipe, 18 air pipeline, 19 blower.

Detailed ways

In order to clearly illustrate the technical features of this solution, the utility model will be further described in detail below in conjunction with specific embodiments and accompanying drawings, but the embodiments of the utility model are not limited thereto.

As shown in Figure 1-2, the device for the rapid treatment of high-concentration organic wastewater by continuous back-fraction activated sludge includes a primary sedimentation tank 1, an aerobic biochemical reaction device 2 and a secondary sedimentation tank 3 connected in sequence; A feeder 4 is connected to the device, and the feeder 4 is used to add enzymes into the aerobic biochemical reaction device; the supernatant outlet of the secondary sedimentation tank 3 is connected to a filter device 5 through a pipeline.

It also includes an intermediate liquid tank 6 connected to the supernatant outlet of the aerobic biochemical reaction device, and a sludge tank connected to the primary sedimentation tank 1, the aerobic biochemical reaction device 2 and the secondary sedimentation tank 3 respectively through the sludge output pipeline. Sludge tank 7, the supernatant liquid outlet of the sludge tank is returned to the aerobic biochemical reaction device through the pipeline.

The aerobic biochemical reaction device includes n aeration tanks connected in series in sequence, and the feeding member is connected to the feed port of the first aeration tank 2.1; a liquid inlet and a liquid outlet are provided on each aeration tank; The liquid outlet on the nth aeration tank 2.n is connected to the liquid inlet on the secondary sedimentation tank, and the second aeration tank 2.2-nth aeration tank 2.n are all provided with the intermediate The liquid outlet pipeline 8 connected to the liquid pool 6; the mud discharge port provided on the secondary sedimentation tank 3 is connected to the liquid inlet of the first aeration tank 2.1 through the mud outlet pipeline 10; the primary sedimentation tank 1, each aeration tank And the secondary sedimentation tank 3 is connected to the sludge tank 7 through the sludge discharge pipeline 9. The supernatant outlets of each aeration tank and secondary sedimentation tank are connected to the intermediate liquid tank 6 through the liquid outlet pipeline 8 .

The supernatant outlet of the sludge tank is connected to the liquid inlet of the first aeration tank through a pipeline.

Described filtering device comprises a recovery tank 13, and the liquid inlet of recovery tank is connected with the supernatant liquid outlet of secondary sedimentation tank through pipeline, is provided with a plurality of membrane modules 14 through bracket suspension support in recovery tank, and the water outlet side water outlet of membrane module is connected with each other. Connect and connect with the inlet of the self-priming pump 15 located outside the recovery tank through pipelines; the outlet of the self-priming pump is connected with a clear water tank 11 through pipelines; the sludge discharge side of the membrane module is connected with the return pump 16 located at the bottom of the recovery tank through pipelines The inlet of the reflux pump is connected with the aerobic biochemical reaction device through the pipeline; several aeration pipes 17 are arranged on the bottom surface of the recovery tank below the membrane module, and the aeration tubes are connected to the outside of the recovery tank through the gas transmission pipeline 18 The blower 19 is connected; the overflow pipeline 12 is connected between the recovery tank and the secondary sedimentation tank.

The pore diameter of the filter membrane of the membrane module is 0.1-0.4 μm.

The feeding part is a feeding pipe connected with the feed port of the first aeration tank.

Specific working process: Pass high-concentration organic wastewater with a COD of 5000-35000mg/L into the primary sedimentation tank 1, after 20-24 hours of sedimentation, the primary sedimentation sludge after primary sedimentation is discharged from the sludge discharge pipe connected to the primary sedimentation tank Road 9 is discharged into the sludge tank 7, and the primary sedimentation sewage is transported through the pipeline to the first aeration tank 2.1 of the aerobic biochemical reaction device, and the primary sedimentation sewage is realized by the liquid inlet and outlet of each aeration tank. In the connection in the adjacent aeration tank, the sewage in the last level of aeration tank enters the secondary sedimentation tank 3 through the liquid outlet; the operation of the aeration tank: according to 1-1.5 hours of sewage inflow, 16-20 hours of aeration, static 2-5 hours, draining 1-1.5 hours, carry out circular aeration treatment in the aeration tank, at the same time, through the feeding part 4-feeding pipe connected to the feed port of the first aeration tank, the flow feeding is prepared. The compound enzyme accelerator, the amount of the compound enzyme accelerator is added according to the amount of primary sediment sewage × 1/300 of the COD concentration of primary sediment sewage. During this treatment process, the treatment liquid is continuously transported and reacted in circulation between each aeration tank and the secondary sedimentation tank, that is, the sewage in the secondary sedimentation tank 3 is re-transported to the first aeration tank through the mud outlet pipeline 10, The aeration tanks are connected sequentially for treatment, and the aerobic biochemical reaction treatment is completed. The entire treatment cycle is 90-120 hours. Close the mud outlet pipeline 10 connecting the secondary sedimentation tank and the first aeration tank, and open each aeration tank and the secondary sedimentation tank. The liquid outlet pipeline 8 that is connected with the sludge tank 7, the supernatant of the aeration tank and the secondary sedimentation tank 3 enters the intermediate liquid pool 6 through the liquid outlet pipeline 8, and the liquid fertilizer is obtained and used in the discharge system; At the same time, the treatment liquid in the secondary sedimentation tank 3 is subjected to secondary sedimentation treatment, and the secondary sedimentation is completed after standing for 4-6 hours, and the supernatant in the secondary sedimentation tank is pumped into the filter device 5, that is, the recovery pool 13 , the supernatant after the secondary precipitation enters the recovery tank 13, and the separation of enzyme and clean water is realized through the membrane module 14. The water outlet side of the membrane module is output by the self-priming pump 15 to the clean water tank 11 through the pipeline, and the discharge reaches the standard after disinfection. In use, the sludge discharge side of the membrane module, that is, the retention side, is recovered by the return pump 16 and transported back to the feeding port of the first aeration tank 2.1 for the next sewage treatment cycle to realize the reuse of enzymes and save costs; The supernatant liquid overflowed from the tank 13 is transported back to the secondary sedimentation tank 3 through the overflow pipeline 12 . Note that the sludge concentration in the recovery tank 13 is controlled below 1000mg/L. After the air is pressurized by the blower, it is discharged from the aeration pipe installed at the bottom of the membrane support to flush the filter membrane of the membrane module, prevent the filter membrane from being blocked by mycelium and other dirt, and ensure the stable operation of the enzyme recovery device. The remaining sludge in each aeration tank and the sludge in the secondary sedimentation tank are discharged into the sludge tank 7 through the sludge discharge pipeline 9, and the sludge in the sludge tank is automatically discharged after reaching the set level. The clear liquid then flows back into the first aeration tank 2.1. The above is a process cycle, the cycle is 90-120h. The process facility can realize cyclic treatment and is flexible and convenient to use.

The valves and pumps installed on the pipelines in the device are commonly used by those skilled in the art, and are omitted in the drawings, which will not affect the understanding of the overall structure, connection settings and cycle working process of the device.

The above-mentioned specific implementation manners cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any alternative improvements or changes made to the implementation manners of the present utility model fall within the protection scope of the present utility model.

The parts of the utility model that are not described in detail are the known technologies of those skilled in the art.

Claims (7)

1. a kind of fraction activated sludge that continuously returns quickly handles high concentrated organic wastewater device, which is characterized in that including successively Primary clarifier, aerobic biochemical reaction unit and the second-level settling pond of connection；One charging of connection on aerobic biochemical reaction unit Part, the charging part are used for stream plus ferment into aerobic biochemical reaction device；The supernatant outlet of the second-level settling pond is through pipe Lu Yuyi filter device is connected.

2. the fraction activated sludge according to claim 1 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is, further includes an intermediate liquid pond being connected with the supernatant outlet of aerobic biochemical reaction unit, and respectively with primary The sludge-tank that sedimentation basin, aerobic biochemical reaction unit and second-level settling pond are connected through sludge output pipe, the supernatant of sludge-tank Outlet is back to by the road in the aerobic biochemical reaction unit.

3. the fraction activated sludge according to claim 2 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is, the aerobic biochemical reaction unit includes the n aeration tanks being sequentially connected in series, the charging part and the 1st aeration tank into Material mouth is connected；Inlet and liquid outlet are equipped on each aeration tank；Liquid outlet on n-th aeration tank be set to second-level settling pond On inlet be connected, be equipped with the outlet tube road being connected with the intermediate liquid pond on the-the n-th aeration tank of the 2nd aeration tank；If It is connected through mud extraction pipeline with the 1st aeration tank inlet in the mud discharging mouth on second-level settling pond.

4. the fraction activated sludge according to claim 3 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is that the supernatant outlet of sludge-tank is connected with the 1st aeration tank inlet by the road.

5. the fraction activated sludge according to claim 1 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is, the filter device includes a recovery pond, the inlet of recovery pond and second-level settling pond supernatant outlet phase by the road Even, several membrane modules are equipped with through bracket support in recovery pond, the water outlet side water outlet of membrane module is connected with each other and passes through pipeline It is connected with the inlet of self-sucking pump being set to outside recovery pond；The spoil disposal side of membrane module is by the road and set on the reflux pump for recycling bottom of pond portion Import be connected, the outlet of reflux pump is connected with aerobic biochemical reaction unit by the road；Recovery pond bottom surface below membrane module Several aeration tubes are equipped with, aeration tube is connected through air delivering pipeline with the air blower being set to outside recovery pond；In recovery pond and two Overflow passage is connected between grade sedimentation basin.

6. the fraction activated sludge according to claim 5 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is that the filtering membrane aperture of the membrane module is 0.1-0.4 μm.

7. the fraction activated sludge according to claim 1 that continuously returns quickly handles high concentrated organic wastewater device, special Sign is that the charging part is a charge pipe being connected with the 1st aeration tank feed inlet.