CN209797686U

CN209797686U - System for purify organic contaminated water

Info

Publication number: CN209797686U
Application number: CN201821585808.0U
Authority: CN
Inventors: 刘昌明; 任仰龙; 李艳芳
Original assignee: Large Green Technology Co Ltd Of Shan Dong Qian
Current assignee: Large Green Technology Co Ltd Of Shan Dong Qian
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2019-12-17
Anticipated expiration: 2028-09-28

Abstract

The utility model discloses a purify system of organic contaminated water, the raw water gets into high load biological oxidation pond earlier and carries out abundant biodegradable, goes out the water and gets into flocculation basin, sedimentation tank after, and the supernatant pump goes into ultrafiltration membrane subassembly and carries out the cross-flow and filter, and the ultrafiltration goes out the water and gets into the clean water basin and go out the water through chlorination, and ultrafiltration membrane subassembly's concentrate and backwash waste liquid flow back to biological oxidation pond and carry out cyclic processing. The utility model discloses a water purification technology organically combines biological oxidation and cross-flow ultrafiltration membrane treatment process, has optimized the problem that conventional biological oxidation method feedwater treatment load is low and conventional dead end ultrafiltration water yield is low, the energy consumption is high, and simultaneous processing technology has improved the removal effect to micromolecular dissolubility organic matter, has guaranteed the biological safety of play water, has practiced thrift area, has reduced the system water energy consumption.

Description

System for purify organic contaminated water

Technical Field

The utility model relates to a system for one set utilizes microbial oxidation technique, ultrafiltration technique and cross-flow filtration technique to purify slight organic contaminated water belongs to drinking water purification treatment technical field.

Technical Field

The inlet water of urban water works contains various organic and inorganic substances, and particularly the water works taking surface water as a water source have high content of soluble organic substances. According to research and research, the drinking water source in most northern areas is mainly slightly polluted by organic matters, and the main pollutants are micromolecular organic matters and algal toxins.

The traditional coagulation, precipitation and filtration process has poor removal effect on soluble organic matters, and particularly basically has no removal effect on small molecular organic matters; the existing advanced treatment processes such as ozone-activated carbon, nanofiltration, reverse osmosis, ion exchange resin and the like have good removal effect on soluble small-molecular organic matters, but have high energy consumption and more increased water production cost, and are difficult to popularize in a large range by the current economic level.

Microorganism contact oxidation is a relatively mature process which mainly utilizes metabolism of microorganisms to degrade organic matters in water, preferentially utilizes small-molecule organic matters, has high removal rate of the small-molecule organic matters, but has low load, is easy to lose microorganisms, and finally contains residual microorganisms in effluent.

disclosure of Invention

An object of the utility model is to provide a system of one set of stable high-efficient organic contaminated water purification treatment.

The specific technical scheme is as follows: a set of system for purifying organic polluted water comprises a biological oxidation tank, a flocculation tank, a sedimentation tank, an ultrafiltration membrane component and a clean water tank which are sequentially connected, wherein the ultrafiltration membrane component is a cross-flow ultrafiltration component, the system also comprises a backflow pipeline, one end of the backflow pipeline is communicated with a backflow water inlet of the biological oxidation tank, and the other end of the backflow pipeline is communicated with the ultrafiltration membrane component and the ultrafiltration membrane component.

wherein, a jet aeration device is arranged at the communication position of the backflow pipeline and the backflow water inlet of the biological oxidation tank.

Wherein, the cross-flow ultrafiltration module is used by the ultrafiltration membrane module, and the backflushing device is an air backflushing device.

Wherein, the sedimentation tank is an inclined tube sedimentation tank.

wherein, the biological oxidation tank is a suspended filler contact oxidation high-load biological oxidation tank, the filler is flexible three-dimensional filler, fiber filler or sponge filler, and the filling rate is 50%.

Wherein, the sludge discharge pipe of the sedimentation tank is connected with the return pipe.

The biological oxidation pond removes most of micromolecular organic matters and algal toxins in raw water, and an ultrafiltration membrane in the cross-flow ultrafiltration component blocks microorganisms carried by the raw water when the raw water passes through the biological oxidation pond, so that the purity of the outlet water is ensured, and no microbial pollution is caused. The cross-flow ultrafiltration device adopts intermittent air back flushing to flush microorganisms on the surface of the ultrafiltration membrane, and back flushing water and concentrated water carrying a large number of microorganisms flow back to the biological oxidation tank through the return pipe so as to ensure the microorganism concentration of the biological oxidation tank. Meanwhile, the deposited sludge in the inclined tube sedimentation tank flows back to the biological oxidation tank through the return pipe, so that the nutrient supply of the biological oxidation tank is ensured, and the high-speed oxidation is facilitated.

And an incident flow aeration device is added in the return pipe and the return water inlet of the biological oxidation tank to oxygenate the return water so as to ensure the oxygen content in the water of the biological oxidation tank.

Has the advantages that:

1. the cross flow concentrated solution is circulated, and the system stability is high

The traditional filtering and backwashing method is to wash out impurities on a filtering membrane, and the invention is characterized in that microorganisms on an ultrafiltration membrane are eluted by backwashing, and then the microorganisms are converged with a cross flow concentrated solution and refluxed to a biological oxidation tank, so that the microorganism concentration of the biological oxidation tank is ensured, the removal rate of organic matters is ensured for a long time, and the reflux water is subjected to jet aeration to provide dissolved oxygen for the growth of the microorganisms;

2. Quick start of biological oxidation pond

The sludge in the sedimentation tank flows back to the biological oxidation tank along with the return water for quick start of the oxidation tank and provides nutrient substances required by microbial oxygen;

3. The invention ensures the quality of the effluent, shortens the water purification process flow, saves the occupied area, reduces the energy consumption and reduces the water production cost.

Drawings

Figure 1 is the process system schematic diagram of the present invention.

Detailed Description

The present invention will be described with reference to the accompanying drawings.

The raw water source adopted by the embodiment of the invention is drinking water collected from a certain large city in the north, and the molecular weight distribution and the algae toxin content of organic matters in the water source are as follows:

As shown in figure 1, a biological oxidation tank, a flocculation tank, a sedimentation tank, a cross-flow ultrafiltration component and a clean water tank are sequentially arranged, raw water (water quantity is Q) enters the biological oxidation tank to remove small molecular organic matters and algal toxins, and the water yield is Q + Q₁Then the wastewater enters a flocculation tank, high-efficiency flocculating agents such as polyaluminium chloride and the like are added, then the wastewater enters an inclined tube sedimentation tank for sedimentation, and then enters a cross flow ultrafiltration component for cross flow ultrafiltration, wherein the water yield of the purified water is Q. The amount of the return water is Q₁。

After raw water passes through the system, the clean water tank is sampled and detected, and compared with a raw water sample, the result is as follows:

According to the data in the table, the removal rate of the organic matters with the molecular weight of less than 1000Daltons of the treated water is 72 percent, the removal rate of the organic matters with the molecular weight of more than 1000 ~ 3000Daltons of the treated water is 43 percent, the removal rate of the organic matters with the molecular weight of 3000 ~ 10000Daltons of the treated water is 51 percent, the water has obvious removal effect on the soluble organic matters in the water, and meanwhile, the removal rates of 2-MIB and geosmin are better and respectively reach 95 percent and 93 percent.

Claims

1. A system for purifying organic polluted water comprises a biological oxidation tank, a flocculation tank, a sedimentation tank, an ultrafiltration membrane component and a clean water tank which are sequentially connected, and is characterized in that the ultrafiltration membrane component is a cross-flow ultrafiltration component, and the system also comprises a return pipeline, wherein one end of the return pipeline is communicated with a return water inlet of the biological oxidation tank, and the other end of the return pipeline is communicated with the ultrafiltration membrane component and the ultrafiltration membrane component.

2. The system of claim 1, wherein a jet aeration device is arranged at the position where the return pipeline is communicated with the return water inlet of the biological oxidation pond.

3. The system of claim 1, wherein the ultrafiltration membrane module uses a cross-flow ultrafiltration module, wherein the back flushing device is an air back flushing device.

4. The system of claim 1, wherein the settling tank is a sloped tube settling tank.

5. The system according to claim 1, wherein the biological oxidation pond is a suspended filler contact oxidation high-load biological oxidation pond, the filler is flexible three-dimensional filler, fiber filler or sponge filler, and the filling rate is 50%.

6. The system of claim 1, wherein the sludge discharge pipe of the sedimentation tank is connected to a return pipe.