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Method for maintaining stability of water quality in pipe network by using effect of iron oxidizing and reducing bacteria in biological membrane

A water quality stability, biofilm technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. effect of operation

Inactive Publication Date: 2013-08-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to implement the method of changing water quality and changing the process to remove organic matter in water under the condition of switching between multiple water sources.

Method used

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  • Method for maintaining stability of water quality in pipe network by using effect of iron oxidizing and reducing bacteria in biological membrane
  • Method for maintaining stability of water quality in pipe network by using effect of iron oxidizing and reducing bacteria in biological membrane
  • Method for maintaining stability of water quality in pipe network by using effect of iron oxidizing and reducing bacteria in biological membrane

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Experimental program
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Effect test

specific Embodiment approach 1

[0016] Specific implementation mode 1: Research on the change of water quality in Tiancun pipeline network

[0017] Pass the sterilized water into the Tiancun pipe, so that the concentration of residual chlorine in the pipe network is 1.5-2.5mg / L. After different days, the Larsen index of the water quality is changed. The experimental results show that the turbidity of the pipe network outlet water is different under different Larsen index conditions. The change is not very big, and the turbidity is relatively low, which meets the requirements of water quality standards.

specific Embodiment approach 2

[0018] Specific implementation mode 2: Research on the change of water quality in the pipe network of Ganlu Garden

[0019] Pass the sterilized water into the manna garden pipe, so that the concentration of residual chlorine in the pipe network is 1.5-2.5mg / L. After different days, the Larsen index of the water quality is changed. The experimental results show that the turbidity of the pipe network outlet water in the first 50 days is very large , "yellow water" is prone to occur. After 50 days, the turbidity of the pipe network outlet water does not change much under different Larsen index conditions, and the pipe network outlet water is relatively stable.

specific Embodiment approach 3

[0020] Specific implementation mode three: Characterization of biofilms in different pipe networks

[0021] DNA extraction, gene amplification and denaturing gradient gel electrophoresis (PCR-DGGE) analysis were performed on the biofilms formed by the Tiancun pipes without yellow water and the manna garden pipes with yellow water. Because the iron-oxidizing bacteria in the biofilm are the dominant bacteria, the iron-oxidizing bacteria are likely to cause the release of iron ions, and the turbidity of the pipe network effluent changes greatly with the change of the influent Larsen index. After increasing the amount of residual chlorine entering the pipe network, the pipe network The structure of the biofilm has changed, and iron-reducing bacteria have appeared, and they have become the dominant bacteria, which is the redox cycle environment for the formation of iron in the corrosion products, so it can inhibit the corrosion of the pipe network and reduce the impact of the Larsen...

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Abstract

The invention relates to a method for maintaining stability of water quality in a pipe network by using an effect of iron oxidized and reduced bacteria in a biological membrane. Aiming at frequent change conditions of the water quality in a water supply mode by multiple water resources, the water are disinfected by a certain amount of a disinfector according to different water quality conditions; residual chlorine concentration in the water entering the pipe network is controlled within 1.5-2.5 mg / L, so that a stable oxide layer biological membrane is formed in the pipe network in 50-70 days under a combined action of the disinfector and the water quality in the pipe network; and iron reduced bacteria become dominant bacteria in the biological membrane. The stable oxide layer can inhibit influences of Larson index change to the water quality of the pipe network, reduce the occurrence probability of 'yellow water', maintain the stability of the water quality in the pipe network, and protect water quality of the effluent in the pipe network.

Description

technical field [0001] The present invention relates to a method for maintaining the stability of pipe network water quality under the conditions of multi-water source water supply and frequent switching of water sources, in particular to a method for maintaining the stability of pipe network water quality by using the action of iron redox bacteria in the pipe network biofilm under the multi-water source water supply mode Sex, a research method to control the occurrence of "yellow water". Background technique [0002] The water supply mode of multiple water sources will provide important water resource support for the coordinated and rapid development of Beijing's economy and society, and effectively guarantee its water demand. For a long time, Beijing's water transmission and distribution network system has mainly transported relatively single and relatively stable water quality, and a stable corrosion layer has formed on the pipe wall during the long-term transmission and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 胡春王海波
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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