CN211170296U

CN211170296U - Novel pretreatment membrane bioreactor

Info

Publication number: CN211170296U
Application number: CN201920993260.1U
Authority: CN
Inventors: 张锋; 同现鹏; 袁梦龙; 谢宝实; 张�杰
Original assignee: Shuiyi Holding Group Co ltd
Current assignee: Shuiyi Environmental Protection Group Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-08-04
Anticipated expiration: 2029-06-28

Abstract

The utility model provides a novel preliminary treatment membrane bioreactor, it includes the preliminary treatment district, MBR district and photocatalysis district, two regions about the preliminary treatment district divide into, be equipped with good foster district and anaerobic zone in the region on the left side, and be equipped with the aeration zone in the region on the right, the bottom is equipped with the aeration pipe, and be equipped with the water flow hole that is connected to the MBR district in one side in the region on the right, the photocatalysis district is connected in the MBR district, wherein one side in photocatalysis district is equipped with an MBR and produces the water district, the water that this MBR produced the water district is with through the suction pump suction, and the overflow gets into the photocatalysis district, be equipped with the light source membrane module in the photocatalysis district, the one end in photocatalysis district is connected and is produced water towerless boosting district storage and be used for flushing. The utility model has the characteristics of combine traditional technology, membrane technology, advanced oxidation technology organically, form the movable integration water treatment facilities to little water yield, system degree of automation is high, unmanned on duty does not need follow-up disinfection treatment, and no disinfection accessory substance, it is simple and convenient to maintain.

Description

Novel pretreatment membrane bioreactor

Technical Field

The utility model relates to a sewage treatment and recycling device, in particular to a distributed integrated sewage treatment and recycling device based on a photocatalytic oxidation technology of a pretreatment membrane bioreactor.

Background

The membrane bioreactor (MBR process for short) utilizes a membrane to replace a secondary sedimentation tank to carry out solid-liquid separation on a mud-water mixture in a biochemical process, and adopts open hollow fiber, flat plate and tubular membrane components, the membrane is directly placed in an aerobic tank or is independently placed, and water permeates through the surface of the membrane under the action of negative pressure suction or positive pressure of a pump, so as to achieve the aim of filtration and purification. MBR processes have been successfully applied to the treatment of municipal and industrial sewage at home and abroad.

The core of the MBR process is an ultrafiltration-level separation membrane for solid-liquid separation, the MBR membrane has various materials and configurations, and each material and configuration has own characteristics and can be reasonably selected according to actual conditions.

The photocatalytic oxidation technology utilizes ultraviolet light or visible light as a catalyst, and a catalytic oxidant generates hydroxyl free radicals with extremely strong oxidizing capability, and the hydroxyl free radicals can indiscriminately oxidize organic matters and reducing substances in water, so that the water quality can be further improved, and meanwhile, the ultraviolet light has the sterilization and disinfection effects, and subsequent disinfection measures are not needed.

Rural sewage, community sewage and small flow industrial wastewater have the following characteristics:

(1) the drainage points are dispersed, and uniform collection and treatment are difficult;

(2) the drainage time is centralized, and the grains are abundant;

(3) the water quantity is small, the collection pipe network is incomplete, and the collection pipe network is difficult to be brought into the pipe network for treatment;

(4) most of the wastewater is directly discharged into nearby water bodies, so that similar non-point source type pollution is generated, and the treatment is difficult;

(5) the waste water usually has certain color, and the appearance is poor after the conventional treatment.

At present, a distributed sewage treatment device is widely applied in China, common processes comprise a micro-power biochemical treatment system, an unpowered biochemical treatment system, an MBR system and the like, a process route mainly based on the traditional biochemical treatment is basically adopted, and after treatment, the requirements of discharge standards can be basically met. However, if the waste water is recycled, the problems of unqualified chromaticity, COD, biological safety and the like exist. Other treatment processes are required to be introduced to realize the recycling of the dispersed sewage. At present, the number of dispersed advanced treatment processes researched at home and abroad is small, and more active carbon filtration processes are reported.

The active carbon filtering process is mainly applied to a small MBR system, is used for removing the chroma of wastewater and simultaneously reduces the COD of the wastewater. However, since the adsorption belongs to a physical process, only the transfer of the pollutants, and the pollutants themselves are not degraded; and the activated carbon needs to be replaced regularly, and the replaced activated carbon belongs to solid waste and also has environmental risks.

Disclosure of Invention

The utility model discloses to not enough among the prior art, consider water conservation and emission reduction simultaneously, provide a distributed integrated sewage treatment and retrieval and utilization device based on pretreatment membrane bioreactor photocatalytic oxidation technique. Through the utility model discloses a handle rural area, district, small enterprise's distributed sewage, reduce the pipe network and lay the cost, the system operation is reliable stable, and product water also can directly discharge with the retrieval and utilization. The process has high automation degree, no unattended operation and simple and convenient management and maintenance, and fundamentally solves the problems of distributed sewage treatment and recycling.

The utility model discloses a following scheme can realize: a novel pretreatment membrane bioreactor comprises a pretreatment area, an MBR area and a photocatalytic area, wherein the pretreatment area is internally provided with a aerobic area, an anaerobic area and an aeration area, the pretreatment area is divided into a left area and a right area, the left area is internally provided with the aerobic area and the anaerobic area, the right area is internally provided with the aeration area, the bottoms of the left area and the right area are provided with aeration pipes, the bottoms of the left area and the right area are provided with a communicated water flow hole, one side of the right area is provided with a water flow hole connected to the MBR area, an MBR membrane component is arranged at the central position in the MBR area, the MBR area is connected with the photocatalytic area, one side section of the photocatalytic area is provided with an MBR water production area, the water in the MBR water production area is pumped in by a suction pump and overflows into the photocatalytic area, a light source membrane component is arranged in the photocatalytic area, one end of the photocatalytic area is connected with a water production towerless pressurizing area for storage, the outlet connected with the other end is provided with a filter, and the water source can be used for farmland irrigation.

Preferably, the method comprises the following steps: the photocatalysis area is also internally provided with a connecting agent adding area, the agent adding area is internally provided with an oxidant, the oxidant adopts multi-point automatic addition, 2-5 agent adding amounts are added at each time, a light source in a light source membrane group adopts an ultraviolet or visible light source and adopts a plurality of sets of series connection modes, each membrane group can be independently used, each membrane group is provided with an automatic mechanical cleaning device, the multi-point adding oxidant of the oxidant is in delayed association with a suction pump in an MBR water production area and is controlled by an inter-equipment power distribution control area. The utility model discloses in, the automatic machine belt cleaning device that the light source membrane group in photocatalytic oxidation district was equipped with regularly washs the fluorescent tube, does not need artificial maintenance basically. And the MBR area is subjected to chemical strengthening backwashing and offline cleaning as required to maintain the stability of the membrane system, the chemical strengthening backwashing is carried out in an automatic mode at regular intervals, and the offline cleaning is carried out in a manual mode at irregular intervals as required.

Has the advantages that:

according to the utility model discloses a scheme can realize distributed sewage's processing and retrieval and utilization requirement, and the device has following outstanding characteristics:

(1) the complete process chain is designed into a movable integrated treatment device, a large amount of pipe network laying is not needed, the device can be made into a full-ground type or a full-underground type, the arrangement is flexible, and the sewage recycling and standard discharge are realized.

(2) The MBR membrane separation technology and the photocatalytic oxidation technology are organically combined, the advantages of the two technologies are complementary, the stability of the system and the quality of produced water are improved, solid suspended matters are hardly contained in the produced water of the MBR membrane, the free radicals generated by the oxidant and the photocatalysis are all used for oxidizing soluble organic matters, and meanwhile, the light source lamp tube is not easy to generate pollution, so that the efficiency of the photocatalytic system is improved, the usage amount of the oxidant is reduced, and the photocatalytic reaction time is shortened.

(3) MBR system and photocatalysis membrane group all have automatic maintenance device, also can guarantee the high-efficient stable operation of system under unmanned on duty.

(4) The photocatalytic oxidation has the sterilization and disinfection effects, and a sterilization device is not required to be arranged in the system, so that the complexity of the process is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in figure 1, a novel pretreatment membrane bioreactor comprises a pretreatment zone 1, an MBR zone 2 and a photocatalytic zone 3, wherein the pretreatment zone 1 is provided with a aerobic zone 4, an anaerobic zone 5 and an aeration zone 6, the pretreatment zone is divided into a left zone and a right zone, the left zone is provided with the aerobic zone 4 and the anaerobic zone 5, the right zone is provided with the aeration zone 6, the bottom is provided with an aeration pipe 7, the bottoms of the left zone and the right zone are provided with a communicated water flow hole 8, one side of the right zone is provided with a water flow hole 9 connected to the MBR zone 2, the MBR zone 2 is internally provided with an MBR membrane component 10 at the center, the MBR zone 2 is connected with the photocatalytic zone 3, one side section of the photocatalytic zone 3 is provided with an MBR water production zone 11, water in the MBR water production zone 11 is pumped by a suction pump and overflows into the photocatalytic zone 3, the photocatalytic zone 3 is internally provided with a light source membrane component 12, one end of the photocatalytic area 3 is connected with a water-producing towerless pressurizing area 13 for storage and is used for flushing toilets and common greening irrigation, and an outlet 14 connected with the other end is provided with a filter 15, and the water source can be used for farmland irrigation.

As shown in the figure: the photocatalytic region 3 is also internally provided with a connecting agent adding region 16, the agent adding region 16 is internally provided with an oxidant, the oxidant is automatically added at multiple points, 2-5 agent adding amounts are added at each time, a light source in the light source membrane group 12 adopts an ultraviolet or visible light source and is in a multi-set serial connection mode, each membrane group 12 can be independently used, each membrane group 12 is provided with an automatic mechanical cleaning device, the oxidant added at multiple points is in delayed association with a suction pump in the MBR water production region 11 and is controlled by an inter-equipment power distribution control region 17.

The utility model discloses a use method of novel pretreatment membrane bioreactor, including the following steps:

a. introducing the sewage into a pretreatment zone, wherein raw water indexes are as follows:

the pretreatment area comprises a coagulating sedimentation process, an anaerobic process, an anoxic process and an aerobic process, and indexes after treatment in the pretreatment area are as follows:

b. and (3) enabling water produced in the pretreatment area to enter an MBR area, wherein the MBR water production index is as follows:

wherein, an immersed hollow fiber membrane, an immersed flat membrane or a split tubular membrane is adopted in the MBR area, the membrane separation aperture is 0.02-0.5 mu m, and the membrane flux is 10-25L MH;

c. the water produced in the MBR area enters the MBR water producing area through a suction pump, a small amount of water is used for membrane system maintenance, and most of overflow water enters a photocatalytic oxidation area for oxidation treatment; the treated water stays for 30-120 min, and the water production indexes are as follows:

d. the utility model discloses the water production after photocatalytic oxidation treatment flows out through one end pipeline and is used for satisfying the retrieval and utilization requirement of flushing toilet, afforestation irrigation, road spraying, can regard as simultaneously and receive the raw water of straining, reverse osmosis, also can directly discharge, the other end can directly reach the standard that this water source can be used for farmland irrigation through the rose box, photocatalytic system and MBR suction pump have the delay to be correlated with each other in step c, MBR suction pump stops after 15 ~ 60min of suction, photocatalytic system shut down, MBR system opens after 15 ~ 60min, photocatalytic system start, and MBR district's water production flux is 10 ~ 25L MH, photocatalytic oxidation system dwell time is 30 ~ 120 min.

Example 1

Distributed integrated sewage treatment and recycling device based on photocatalytic oxidation technology of pretreatment membrane bioreactor

(1) Introducing rural domestic sewage into a pretreatment area, wherein raw water indexes are as follows:

wherein, the pretreatment area adopts an anoxic/aerobic process (A/O process for short), and after the pretreatment process, the water quality indexes are as follows:

(2) the pretreatment area produces water and enters into the MBR area, and the MBR produces water index as follows:

the MBR membrane adopts an immersed hollow fiber membrane, the membrane separation aperture is 0.4 mu m, and the membrane flux is 15L MH.

(3) Water produced in the MBR area enters the MBR water producing area, a small amount of water is used for maintaining a membrane system, and most of overflow water enters the photocatalytic oxidation area for oxidation treatment; the treated water stays in the system for 30min, and the water production indexes are as follows (average value of regular monitoring):

after the treatment, the pollutant index of the sewage is close to the water quality requirement of IV-class water, the sewage is reused for landscaping and road spraying in a tower-free water supply mode, and redundant water is directly discharged into a nearby pond.

Example 2

(1) Introducing the sewage of a bean product processing factory through a septic tank into a pretreatment area, wherein the raw water indexes are as follows:

wherein, the pretreatment area adopts a coagulating sedimentation/anoxic/aerobic process, and after the pretreatment process, the water quality indexes are as follows:

the MBR membrane adopts an immersed hollow fiber membrane, the membrane separation aperture is 0.4 mu m, and the membrane flux is 12L MH.

(3) Water produced in the MBR area enters the MBR water producing area, a small amount of water is used for maintaining a membrane system, and most of overflow water enters the photocatalytic oxidation area for oxidation treatment; the treated water stays in the system for 90min, and the water production indexes are as follows (average value of regular monitoring):

after the treatment, the pollutant index of the sewage is close to the pollutant discharge standard of urban sewage treatment plant

(GB18918-2002) the requirement of a primary A standard, one part of the standard is used for greening irrigation in a plant area, and the other part of the standard is directly discharged outside.

Example 3

(1) Introducing sewage of the residential area through a septic tank into a pretreatment area, wherein raw water indexes are as follows:

wherein, the pretreatment area adopts an anoxic/aerobic process, and after the pretreatment process, the water quality indexes are as follows:

(2) the pretreatment area produces water and enters into the MBR system, and the MBR produces water index as follows:

(3) Water produced in the MBR area enters an MBR water producing tank, a small amount of water is used for maintaining a membrane system, and most of overflow water enters a photocatalytic oxidation area for oxidation treatment; the treated water stays in the system for 25min, and the water production indexes are as follows (average value of regular monitoring):

after the treatment, the pollutant indexes of the sewage are close to the IV-class water quality requirements, one part of the sewage is used for greening irrigation of the residential area, and the other part of the sewage is directly discharged.

Claims

1. A novel pretreatment membrane bioreactor comprises a pretreatment area, an MBR area and a photocatalytic area, wherein the pretreatment area is provided with a aerobic area, an anaerobic area and an aeration area, and is characterized in that the pretreatment area is divided into a left area and a right area, the left area is provided with the aerobic area and the anaerobic area, the right area is provided with the aeration area, the bottoms of the left area and the right area are provided with aeration pipes, the bottoms of the left area and the right area are provided with a communicated water flow hole, one side of the right area is provided with a water flow hole connected with the MBR area, an MBR membrane component is arranged at the central position in the MBR area, the MBR area is connected with the photocatalytic area, one side section of the photocatalytic area is provided with an MBR water production area, water in the MBR water production area is pumped in through a suction pump and overflows into the photocatalytic area, a light source membrane component is arranged in the photocatalytic area, one end of the photocatalytic area is connected with a water production towerless pressurizing area for storage for flushing, the outlet connected with the other end is provided with a filter, and the water source can be used for farmland irrigation.

2. The novel pretreatment membrane bioreactor as claimed in claim 1, wherein a connection dosing placement area is further arranged in the photocatalytic area, an oxidant is arranged in the dosing placement area, the oxidant is automatically added at multiple points, 2-5 dosing points are added at each time, the light source in the light source membrane group adopts an ultraviolet or visible light source and is connected in series, each membrane group can be used independently, each membrane group is provided with an automatic mechanical cleaning device, the oxidant is added at multiple points and is in delayed association with a suction pump in the MBR water production area, and the control is performed by an inter-equipment power distribution control area.