CN201923929U - Reclaimed water recycling treatment system - Google Patents

Abstract

The utility model discloses a reclaimed water recycling treatment system, which comprises a recycling portion and a draining portion. The recycling portion includes an adjusting tank, an anoxic tank, an MBR (membrane biological reactor) tank and a clear water tank which are communicated sequentially, wherein the MBR is communicated with a sludge tank by the aid of a sludge discharge pipe. The draining portion includes an adjusting tank, a second anoxic tank, a contact oxidation tank and a secondary settling tank which are communicated sequentially, wherein the secondary settling tank is communicated with the sludge tank by the aid of a sludge discharge pipe, and outlet water of the secondary settling tank is drained outwards. The reclaimed water recycling treatment system is simple in process, reliable in performance, stable in operation, low in energy consumption, small in floor area, fine in outlet water quality and less in sludge and has fine environmental and economic benefits, wastewater recycling is realized, and environmental pollution is decreased.

Description

A treatment system for reclaimed water

technical field

The utility model relates to the technical field of sewage treatment, in particular to a reclaimed water treatment system.

Background technique

Sewage engineering is an infrastructure project of the company. It is not only an indispensable production condition for the production department, but also a necessary condition for improving the environment. At present, the existing sewage treatment systems of enterprises, hotels, etc. are to discharge sewage into surface water bodies or Access to urban sewage treatment system. However, water resources are becoming increasingly scarce. How to make better use of water resources is a major issue for environmental protection and sustainable development. At the same time, considering the cost of water use, it is also very necessary for enterprises to recycle sewage.

For sewage recycling, the sewage treatment can be used in places that do not require high water quality, such as reuse for toilet flushing, road cleaning, fire protection, greening, vehicle washing, etc. In addition to reducing environmental pollution, it can reduce a large amount of water consumption every year , and save the cost of sewage, with good economic benefits. However, the existing biochemical process cannot meet the standard requirements stably, and there are problems such as long process, high energy consumption, and large floor area, which affect the popularization and application of wastewater recycling.

Utility model content

The utility model is to provide a reclaimed water reuse treatment system in order to solve the problems existing in the above-mentioned prior art. After treatment, the water quality of the reused part and the effluent part can reach the national standard, realize the reuse of waste water, and the process is simple , stable operation, low energy consumption and small footprint.

The purpose of this utility model is achieved through the following technical solutions:

A treatment system for reclaimed water, comprising a reusing part and an external discharge part, the reusing part includes a regulating tank, an anoxic tank, an MBR tank and a clear water tank connected in sequence, and the MBR tank is connected to the sewage through a sludge discharge pipe. Mud pond; the effluent part includes a regulating pond, a second anoxic pond, a contact oxidation pond and a secondary settling pond connected in sequence, and the secondary settling pond is connected to the sludge pond through a sludge discharge pipe, and the effluent of the secondary settling pond is discharged .

The membrane bioreactor of the MBR pool adopts a submerged flat-plate membrane module.

A grid pool is arranged at the front end of the adjustment pool.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model provides a reclaimed water reuse treatment system with simple flow, reliable performance, stable operation, low energy consumption, small floor area, good effluent quality, and less sludge volume, which realizes waste water reuse and reduces environmental pollution. Good environmental and economic benefits.

Among them, the reclaimed water reuse part has excellent water quality, stable effluent, SS<3 mg/L, and can intercept bacteria and E. coli in the water at the same time, and the treatment effect is good. Due to the long sludge age, the removal rate of refractory organic matter can be greatly improved, and the ideal treatment effect can also be achieved for sewage with high BOD concentration. It can operate under the conditions of high volume load, low sludge load and long sludge age, and produces less residual sludge, thus reducing the cost of sludge treatment facilities.

While inheriting the advantages of the traditional contact oxidation process, such as good effect, stable operation, and convenient operation and management, the external discharge part also has the advantages of strong load resistance, relatively small sludge production, and good ammonia nitrogen removal effect.

Description of drawings

Fig. 1 is a schematic flow chart of an embodiment of the present invention.

Detailed ways

Describe the utility model in detail below in conjunction with accompanying drawing.

As shown in Figure 1, a reclaimed water reuse treatment system includes a reuse part and an external discharge part. The reuse part includes a regulating pool 1, an anoxic pool 2, an MBR pool 3 and a clean water pool 4 connected in sequence, and the MBR pool 3 Connect to the sludge tank 5 through the sludge discharge pipe; the external discharge part includes the adjustment tank 1, the second anoxic tank 6, the contact oxidation tank 7 and the secondary sedimentation tank 8 connected in sequence, and the secondary sedimentation tank 8 is connected to the sludge through the sludge discharge pipe Pond 5, the effluent of secondary sedimentation tank 8 is discharged.

When in use, the sewage is collected first and then transported to the regulating tank. Since the sewage contains large particles and suspended impurities, in order to protect the normal operation of the treatment system equipment and prevent pipeline blockage, a grid pool 9 is installed at the front end of the regulating tank to effectively intercept the particles and suspended impurities. The sewage after being intercepted by the grid Self-flow into the adjustment pool. The regulating tank adjusts the sewage water volume and uniform water quality to improve the impact resistance of the system. It is equipped with a sewage lifting pump, and the liquid level gauge automatically controls the opening and closing of the water pump to lift the sewage to the subsequent reaction unit.

Sewage entering the anoxic tank can not only increase the B/C ratio, which is beneficial to subsequent treatment, but also can use denitrification to remove nitrogen, has a certain ability to remove organic matter, and can reduce the burden on subsequent treatment.

Then the sewage enters the MBR tank, and the membrane bioreactor is the core process. The membrane bioreactor (Membrane Bioreactor, MBR) is a new type of high-efficiency sewage treatment process that combines high-efficiency membrane separation technology with traditional activated sludge. The submerged membrane module of the structure is placed in the aeration tank, and the water after aerobic aeration and biological treatment is pumped out after being filtered through the filter membrane by the pump. It is very different from the traditional sewage treatment method, replacing the secondary sedimentation tank and the tertiary treatment process in the traditional biochemical process. Due to the existence of the membrane, the solid-liquid separation ability of the system is greatly improved, so that the system effluent water quality and volume load are greatly improved, and the effluent water can reach the miscellaneous water standard. Due to the filtration effect of the membrane, the microorganisms are completely trapped in the bioreactor, which realizes the complete separation of the hydraulic retention time and the sludge age of the activated sludge, and eliminates the sludge bulking problem in the traditional activated sludge method. Membrane bioreactor has the advantages of high pollutant removal efficiency, strong nitrification ability, stable effluent quality, low residual sludge output, compact equipment, and simple operation. The membrane bioreactor of the MBR pool adopts a submerged flat membrane module. The flat membrane has the following advantages: a. The membrane has strong anti-pollution ability and long service life, which is 5-10 years, and usually does not generate replacement costs; b. The membrane cleaning cycle is long; c. The cleaning operation is very simple and can be cleaned online; d. More stable operation and better water quality; e. Low-pressure (suction or gravity) water discharge, low energy consumption, and lower operating costs; the application of flat membranes can ensure long-term stable and safe operation of the system.

The effluent from the MBR tank is discharged into the clear water tank for use, and the sludge in the MBR tank is discharged into the sludge tank through the sludge pump and the sludge discharge pipe. The sludge in the sludge tank is sterilized and then transported outside.

For the part of the collected sewage that exceeds the amount of reuse, it enters the discharge part, and the sewage is lifted from the regulating tank to the second anoxic tank. The outlet of the second anoxic tank is connected to the contact oxidation tank, and the outlet of the contact oxidation tank is connected to the secondary sedimentation The sludge from the secondary sedimentation tank is discharged into the sludge tank through the sludge pump and the sludge discharge pipe. The sludge in the sludge tank is sterilized and then transported outside, and the effluent from the secondary sedimentation tank is discharged according to the relevant discharge standards.

The above disclosures are only a few specific embodiments of the present application, but the present application is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present application.

Claims (3)

1. A middle water reuse treatment system, comprising a reuse part and an external discharge part, is characterized in that the reuse part comprises a regulating pond, anoxic pond, MBR pond and clear water pond connected successively, and the MBR pond The sludge tank is connected through the sludge discharge pipe; the external discharge part includes a regulating tank, a second anoxic tank, a contact oxidation tank and a secondary sedimentation tank connected in sequence, and the secondary sedimentation tank is connected to the sludge tank through the sludge discharge pipe. The effluent of sinking pond is discharged outside. 2. A kind of reclaimed water treatment system as claimed in claim 1, is characterized in that, the membrane bioreactor of described MBR tank adopts submerged flat-plate membrane module. 3. A reclaimed water treatment system according to claim 1, characterized in that a grid pool is arranged at the front end of the adjustment pool.