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Method for treating sewage by using biological membrane and equipment thereof

A biofilm and biofilm carrier technology, applied in the field of water treatment, can solve the problems of difficult treatment, unfavorable large-area water application, high operation and management costs, low oxygen supply cost, low operation and preparation cost, and continuous purification effect. effective effect

Inactive Publication Date: 2010-09-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing river biofilm in-situ treatment technology is mainly based on the contact oxidation process in sewage treatment. The biofilm and the carrier are completely submerged underwater. Due to the restriction of low dissolved oxygen in water, an anaerobic state appears. At present, the main way to increase dissolved oxygen in water is to use mechanical aeration. The operation and management costs are relatively high, which is not conducive to the application on large-area water bodies, and it is difficult to effectively control it for a long time.

Method used

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  • Method for treating sewage by using biological membrane and equipment thereof
  • Method for treating sewage by using biological membrane and equipment thereof
  • Method for treating sewage by using biological membrane and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cut the 20cm-wide microfiber fabric into 15cm-long cloth pieces, and evenly paste zeolite particles with a particle size of about 1cm on both sides to construct a suspended biofilm mass transfer and carrier unit; use angle steel to construct a length, width and height of 30cm respectively , 25cm, 50cm rectangular frame; the frame is set around a plastic box (length, width and height: 25cm, 20cm, 40cm) filled with domestic sewage, and the suspended biofilm unit is first aerated in the domestic sewage by traditional methods to hang the membrane, and the membrane is successfully installed Finally, the upper end of each unit cloth is fixed with iron wire and hung on the frame, and the lower end of the cloth is immersed in the water in the plastic box by 5 cm. A total of 15 units are evenly suspended above the sewage, and the interval between the units is about 1-2 cm. The domestic sewage in the plastic box is treated in sequential batch. The domestic sewage used is diluted ...

Embodiment 2

[0028] Cut the microfiber fabric and non-woven fabric with a width of 20cm into 15cm-long cloth pieces, evenly paste sand particles with a particle size of about 1cm on both sides of the non-woven fabric, and wrap two pieces of microfiber fabric with the non-woven fabric. And fix them together with thread sutures to build a suspended biofilm mass transfer and carrier unit; use angle steel to build a rectangular frame with a length, width, and height of 30cm, 25cm, and 50cm; the frame is set in a plastic box filled with domestic sewage (length, width, and height: 25cm, Around 20cm, 40cm), the suspended biofilm unit is first aerated in the domestic sewage with the traditional method to hang the film. After the film is successfully installed, the upper end of each unit cloth is fixed with iron wire, hung on the frame, and the lower end of the cloth is 5cm into the plastic box. In the water, a total of 15 units are evenly suspended above the sewage, and the interval between the uni...

Embodiment 3

[0030] Cut the 20cm wide microfiber fabric into 15cm long cloth pieces, roughen the surface of the semi-rigid plastic sheet, cut it into the same size, wrap the two pieces of microfiber fabric with the plastic sheet, and fix them together with thread , to construct a suspended biofilm mass transfer and carrier unit; use angle steel to construct a rectangular frame with a length, width and height of 30cm, 25cm, and 50cm; the frame is set around a plastic box (length, width, and height: 25cm, 20cm, 40cm) filled with domestic sewage, The suspended biofilm unit is first aerated in the domestic sewage with the traditional method to hang the film. After the film is successfully hung, the upper end of each unit cloth is fixed with an iron wire and hung on the frame. 15 units are evenly suspended above the sewage, with an interval of about 1-2cm between the units. The domestic sewage in the plastic box is treated in a sequential batch manner. The removal rate of COD and ammonia nitroge...

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Abstract

The invention belongs to the field of water treatment, and relates to a method for treating sewage by using a biological membrane and equipment thereof. In the method, a biological membrane carrier is adopted and floats on the water, and a material having capillary water absorption function is used as a medium for connecting the biological membrane carrier and a water body environment under the water. The pre-cultured mature biological membrane can be suspended above the water, and microbial strains can be transferred to the carrier to perform culture and enrichment by using the medium with strong capillary water absorption effect. Therefore, the formed biological membrane is directly contacted with the air, so the transfer speed of oxygen is high, soluble pollutants in the water are continuously transferred, and the technique of suspending the capillary mass-transfer biological membrane can fully meet the aerobic biodegradation of the high-concentration pollutants and belongs to a technique of naturally strengthening the aerated biological membrane. The method for treating the sewage by using the biological membrane has the advantages of high organic load, low oxygen supply cost, easy construction and management, flexible application and the like; and the method can be applied to in-situ treatment of polluted rivers, and can effectively and constantly perform sewage purification.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method and equipment for treating sewage by using biofilm. Background technique [0002] With the rapid development of the economy, the development of urban infrastructure cannot keep up with the increase in population, and a large amount of domestic sewage is directly discharged into nearby water bodies without treatment. Many urban rivers receive a large amount of sewage, which far exceeds their self-purification capacity. Severe organic pollution leads to rapid consumption of dissolved oxygen in the water. city ​​development. It has become an urgent need to develop an effective treatment technology to control pollution and restore the damaged river ecosystem. [0003] In recent years, biofilm technology has been widely studied and adopted as a technology for controlling water pollution. Because biofilm technology can fix and enrich a large number of microorganis...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 种云霄张珺蓉黄新颖吕丹
Owner SOUTH CHINA AGRI UNIV
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