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Partitioned sampling method applied to water supply network pipe scale/pipe biofilm

A technology for partitioning water supply pipes and membranes, applied in biochemical equipment and methods, and microbial measurement/inspection, etc., can solve problems such as differences in spatial distribution of pipe scale/pipeline biofilm, rare reports of pipe scale and biofilm, etc., to achieve Improve reliability and repeatability, optimize the effect of sampling methods

Inactive Publication Date: 2014-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, due to the limitation of research conditions, most of the current research on pipe scale / pipe network biofilm focuses on artificially simulated pipe network [1,2] , the research on the actual pipe scale and biofilm is rarely reported, and even if there is, it is limited to qualitative research, often only taking part of the pipe scale / pipeline biofilm for qualitative analysis; while ignoring the fact that the actual pipeline is in service, due to The physical and chemical properties of substances in water are different, and the water conservancy conditions are slightly different in space, resulting in differences in the spatial distribution of pipe scale / biofilm

Method used

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  • Partitioned sampling method applied to water supply network pipe scale/pipe biofilm
  • Partitioned sampling method applied to water supply network pipe scale/pipe biofilm
  • Partitioned sampling method applied to water supply network pipe scale/pipe biofilm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In an urban area of ​​Zhejiang Province, the pipe scale / pipeline biofilm was sampled in three equal parts with the pipe scale / pipeline biofilm of 19 years old, pipe diameter DN600, and pipe material in gray cast iron pipes, and the heavy metals (Fe, Fe, Zn, Mn, Pb, Cu, Cr and Cd) content, trihalomethane disinfection by-products (measured in label 3 samples); pipe scale / pipeline biofilm was cultured in R2A medium to determine common bacteria in drinking water (large intestine Bacterial count, Salmonella count and Shigella count) cultured bacterial count.

[0061] Tested out,

[0062] 1. Comparing the three equally divided areas, the content of heavy metals in the pipe wall per unit area, the order of the 7 metals is upper area image 3 ); The total amount of 7 kinds of heavy metals in the pipe wall per unit area, the ratio of the three areas is upper area: middle area: lower area = 1: 1.34: 2.12;

[0063] 2. Comparing the three equally divided areas, the content of trih...

Embodiment 2

[0070] In an urban area of ​​Zhejiang Province, the pipe scale and pipe biofilm were sampled in three equal parts with the pipe scale and pipe biofilm of 11 years old, pipe diameter DN300, and pipe material, and the heavy metals (Fe, Zn) in the pipe scale / pipe biofilm were determined , Mn, Pb, Cu, Cr and Cd) content, trihalomethane disinfection by-products (tested by label 3 samples); the pipe scale / pipeline biofilm was cultured with R2A medium, and the common bacteria (coliform bacteria) in drinking water were determined colonies, Salmonella and Shigella) cultured colonies.

[0071] Tested out:

[0072] 1. Comparing the three equally divided areas, the content of heavy metals in the pipe wall per unit area, the order of the seven metals is upper area Figure 4 ); The total amount of 7 kinds of heavy metals in the pipe wall per unit area, the ratio of the three areas is upper area: middle area: lower area = 1: 1.66: 2.77;

[0073] 2. Comparing the three equally divided areas,...

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Abstract

The invention discloses a partitioned sampling method applied to a water supply network pipe scale / pipe biofilm. The upper and lower positions of an in-situ space are marked on the outer wall of a pipe by using a paint before the pipe is transferred; soil out of the pipe is cleaned after the pipe is excavated; the outer pipe wall of a pipe section is cleaned until the outer pipe wall and a pipe orifice are clean and free of dirt; the inner wall of the pipe section is partitioned into a plurality of equal zones according to the upper and lower positions of the space and the size of the pipe diameter when the pipe section of the pipe is in service; partitioned sampling is carried out by adopting a pulling line method boundary. In view of the difference of physicochemical properties existing in different particles in water, the pipe scale / pipe biofilm at the space position on the inner wall of the pipe will generate a significant difference in property after long-term accumulation, and the sampling reliability and repeatability are improved.

Description

technical field [0001] The present invention designs a sampling method applied to pipe scale / pipeline biofilm in water supply pipe networks, which belongs to the scheme of sample collection when studying the physical and chemical properties and microbial characteristics of pipe scale / pipeline biofilm in water supply pipe networks. The partitioned sampling It is: According to the spatial location, the inner wall of the water supply pipeline is divided into several equal-area areas, and the properties of pipe scale / pipeline biofilm in each area are significantly different. Background technique [0002] In recent years, most of the research on pipe network biofilms has focused on artificially simulated pipe network research. [1,2] , There are few studies on actual pipe scale and biofilm. In particular, domestic research on drinking water safety is basically limited to water quality, and research reports on pipe scale / pipeline biofilm in water supply pipe networks are very rare...

Claims

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Application Information

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IPC IPC(8): C12Q1/24
Inventor 楼莉萍陈环宇魏宗元姚玲丹胡宝兰柳景青陈婷婷裘尚德周晓燕何晓芳
Owner ZHEJIANG UNIV