CN212102486U

CN212102486U - Food wastewater treatment system

Info

Publication number: CN212102486U
Application number: CN202020525897.0U
Authority: CN
Inventors: 付明鹏; 李焱; 彭强; 陈中典
Original assignee: Sichuan Tuori Xinneng Environmental Protection Technology Co ltd
Current assignee: Sichuan Tuori Xinneng Environmental Protection Technology Co ltd
Priority date: 2020-04-12
Filing date: 2020-04-12
Publication date: 2020-12-08
Anticipated expiration: 2030-04-12

Abstract

The invention provides a food wastewater treatment system, which comprises a water collecting tank, an adjusting tank, a coagulation air flotation tank, a hydrolysis acidification tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank which are sequentially connected through pipelines; the coagulation air flotation tank and the secondary sedimentation tank are connected with a sludge tank through a sludge pipeline, and the secondary sedimentation tank is communicated to a pipeline between the hydrolysis acidification tank and the anoxic tank through a sludge return pipeline. The equipment contained in the invention is easy to obtain and transform, has excellent removal effect on large fixed objects, suspended matters, organic matters and the like contained in the food wastewater, and has moderate energy consumption source; finally, the obtained supernatant is discharged after reaching standards, the method is environment-friendly, the mud cakes are collected and transported outside, and the operation cost of the whole system is reduced.

Description

Food wastewater treatment system

Technical Field

The invention belongs to the technical field of environmental protection, and particularly relates to a food wastewater treatment system.

Background

The raw materials of the food industry are wide, the products are various, the water quantity and the water quality of discharged wastewater are greatly different, the wastewater generated by the food industry is extremely complex, the discharged wastewater contains large fixed objects, suspended matters and organic matters, is easy to decay, and is easy to cause eutrophication of water bodies, so that aquatic animals and fishes die, underwater sediments are promoted to generate odor, the water quality is deteriorated, and the environment is polluted.

At present, the treatment modes of food wastewater are mostly divided into three types: physical treatment, chemical treatment and biochemical treatment are not preferable in terms of treatment effect and energy consumption.

Therefore, it is an urgent need for those skilled in the art to develop a food wastewater treatment system that consumes less energy and can perform rapid and efficient treatment.

Disclosure of Invention

In order to solve the problems, the invention discloses a food wastewater treatment system.

In order to achieve the purpose, the invention provides the following technical scheme:

a food wastewater treatment system comprises a water collecting tank, an adjusting tank, a coagulation air flotation tank, a hydrolysis acidification tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank which are sequentially connected through pipelines; the coagulation air flotation tank and the secondary sedimentation tank are connected with a sludge tank through a sludge pipeline, and the secondary sedimentation tank is communicated to a pipeline between the hydrolysis acidification tank and the anoxic tank through a sludge return pipeline. Further, the sludge tank is also connected with a sludge dewatering machine through a pipeline; the sludge dewatering machine is also respectively connected with a filtrate return pipeline and a mud cake outward conveying pipeline; the filtrate return line is communicated with the regulating tank. Furthermore, an adding pipeline is also installed in the coagulation air flotation tank in a matching way; the adding pipeline comprises an alkali liquor adding pipeline, a PAC adding pipeline and a PAM adding pipeline. Further, the coagulation air flotation tank comprises a coagulation tank and a flocculation tank; the alkali liquor adding pipeline and the PAC adding pipeline are both connected with the coagulation tank; PAM adds the pipeline and links to each other with the flocculation basin. Further, the secondary sedimentation tank is also connected with a discharge pipeline. Further, air blowers are arranged in the secondary anoxic tank and the secondary aerobic tank in a matched mode. Furthermore, a grid is arranged at the inlet of the water collecting tank in a matching way.

Compared with the prior art, the equipment contained in the whole system is easy to obtain and transform, has excellent removal effect on large fixed objects, suspended matters, organic matters and the like contained in the food wastewater, and has moderate energy consumption source; finally, the obtained supernatant is discharged after reaching standards, the method is environment-friendly, the mud cakes are collected and transported outside, and the operation cost of the whole system is reduced.

Drawings

FIG. 1 is a block diagram of the present invention.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the present invention is a structural block diagram of a food wastewater treatment system, which comprises a water collecting tank, an adjusting tank, a coagulation air flotation tank, a hydrolysis acidification tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank which are connected in sequence through pipelines.

The inlet of the water collecting tank is provided with a grid in a matching way.

The coagulation air flotation tank and the secondary sedimentation tank are connected with a sludge tank through a sludge pipeline, the secondary sedimentation tank is communicated to a pipeline between the hydrolysis acidification tank and the anoxic tank through a sludge return pipeline, and the secondary sedimentation tank is connected with a discharge pipeline.

The coagulation air floatation tank is also provided with an adding pipeline in a matching way; the addition pipeline comprises an alkali liquor addition pipeline, a PAC addition pipeline and a PAM addition pipeline; the coagulation air floatation tank comprises a coagulation tank and a flocculation tank; the alkali liquor adding pipeline and the PAC adding pipeline are both connected with the coagulation tank; PAM adds the pipeline and links to each other with the flocculation basin. The sludge tank is also connected with a sludge dewatering machine through a pipeline; the sludge dewatering machine is also respectively connected with a filtrate return pipeline and a mud cake outward conveying pipeline; the filtrate return line is communicated with the regulating tank. And air blowers are arranged in the secondary anoxic tank and the secondary aerobic tank in a matching way.

When the device operates, food wastewater to be treated automatically flows into the collecting tank, large solid matters in the food wastewater are removed through the grating at the inlet of the collecting tank, and when the liquid level in the collecting tank reaches a certain depth, the food wastewater is lifted into the regulating tank through the lifting pump between the collecting tank and the regulating tank; the wastewater volume is homogenized in the regulating reservoir through the reservoir volume, and the incoming water in different time periods is mixed to homogenize the water quality under the action of a stirring system in the regulating reservoir, so that the foundation is laid for the normal operation of a subsequent system.

The equalizing basin goes out to promote to thoughtlessly congeal in the air supporting pond through the pump after water, thoughtlessly congeal the air supporting pond and constitute with the flocculation basin, thoughtlessly congeal the air supporting pond and still cooperate the installation to add the pipeline, add the pipeline and add the pipeline by alkali lye and constitute by PAC, alkali lye adds the pipeline and PAC adds the pipeline and all links to each other with the flocculation basin, PAM adds the pipeline and links to each other with the flocculation basin, with this to throwing alkali lye and PAC in the coagulation basin, throw PAM in the flocculation basin, coagulate after intensive mixing and flocculation reaction. Then the wastewater enters an air floatation section, flocs formed in the wastewater are subjected to solid-liquid separation through microbubbles, generated scum enters a sludge tank through a sludge pipeline, and clear water enters a subsequent hydrolysis acidification tank.

And (4) after entering a hydrolysis acidification tank, carrying out pollutant structure destruction and reducing the concentration of part of pollutants.

The effluent of the hydrolysis acidification tank enters a first-stage anoxic tank, is mixed with the return sludge and the return mixed liquor of the first-stage aerobic tank, and nitrate nitrogen in the wastewater is converted into nitrogen to be removed through the biochemical action of denitrifying bacteria, and meanwhile, a part of organic matters can be removed; and then, the effluent of the first-stage anoxic tank automatically flows into a first-stage aerobic tank, most of the residual organic matters in the wastewater are removed by aerobic carbonization bacteria by adopting an activated sludge process, and the ammonia nitrogen is nitrified by nitrifying bacteria.

After the treatment of the first-stage aerobic tank is finished, the effluent enters a second-stage anoxic tank to be mixed with the reflux mixed liquid of the second-stage aerobic tank, nitrate nitrogen which is not removed in the first-stage anoxic tank and nitrate nitrogen which flows back from the second-stage aerobic tank are further converted into nitrogen to be removed, the effluent enters the second-stage aerobic tank to oxidize the residual organic matters in the wastewater, and the residual ammonia nitrogen is further nitrified.

And after the secondary aerobic tank is treated, the effluent enters a secondary sedimentation tank, solid matters such as sludge and the like in the effluent of the aerobic tank are removed through solid-liquid separation, part of sludge at the bottom flows back to the front end of the primary anoxic tank, part of the sludge is discharged to a sludge tank, and the supernatant reaches the standard and is discharged.

Air floatation scum and excess sludge in the secondary sedimentation tank are discharged into a sludge tank, the sludge is pumped to a sludge dewatering machine in time according to the storage capacity of the sludge for dewatering treatment, sludge cakes are collected and transported outwards, and filtrate flows back to a regulating tank.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.

Claims

1. A food waste water treatment system which characterized in that: comprises a water collecting tank, an adjusting tank, a coagulation air flotation tank, a hydrolysis acidification tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank which are connected in sequence through pipelines; the coagulation air flotation tank and the secondary sedimentation tank are connected with a sludge tank through a sludge pipeline, and the secondary sedimentation tank is communicated to a pipeline between the hydrolysis acidification tank and the anoxic tank through a sludge return pipeline.

2. The food waste water treatment system according to claim 1, wherein: the sludge tank is also connected with a sludge dewatering machine through a pipeline; the sludge dewatering machine is also respectively connected with a filtrate return pipeline and a mud cake outward conveying pipeline; and the filtrate return pipeline is communicated with the regulating tank.

3. The food waste water treatment system according to claim 1, wherein: the coagulation air floatation tank is also provided with an adding pipeline in a matching way; the adding pipeline comprises an alkali liquor adding pipeline, a PAC adding pipeline and a PAM adding pipeline.

4. The food waste water treatment system according to claim 3, wherein: the coagulation air floatation tank comprises a coagulation tank and a flocculation tank; the alkali liquor adding pipeline and the PAC adding pipeline are both connected with the coagulation tank; and the PAM adding pipeline is connected with the flocculation tank.

5. The food waste water treatment system according to claim 1, wherein: the secondary sedimentation tank is also connected with a discharge pipeline.

6. The food waste water treatment system according to claim 1, wherein: and air blowers are arranged in the secondary anoxic tank and the secondary aerobic tank in a matching way.

7. The food waste water treatment system according to claim 1, wherein: and a grid is arranged at the inlet of the water collecting tank in a matching way.