Biostability in distribution systems in one city in southern China： Characteristics, modeling and control strategy

This study investigated the bacterial regrowth in drinking water distribution systems receiving finished water from an advanced drinking water treatment plant in one city in southem China. Thirteen nodes in two water supply zones with different aged pipelines were selected to monitor water temperatu...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental sciences (China) 2014-02, Vol.26 (2), p.323-331
Main Authors: Lu, Pinpin, Zhang, Xiaojian, Zhang, Chiqian, Niu, Zhangbin, Xie, Shuguang, Chen, Chao
Format: Article
Language:English
Subjects:
AOC
bacterial regrowth
biostability
China
chloramine residual
Disinfection
distribution system
Models, Biological
Organic Chemicals - isolation & purification
Principal Component Analysis
Water Microbiology
Water Purification
Water Supply
中国南方
城市
控制策略
曲线分析
残留浓度
生物稳定性
稳定性控制
配电系统
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study investigated the bacterial regrowth in drinking water distribution systems receiving finished water from an advanced drinking water treatment plant in one city in southem China. Thirteen nodes in two water supply zones with different aged pipelines were selected to monitor water temperature, dissolved oxygen （DO）, chloramine residual, assimilable organic carbon （AOC）, and heterotrophic plate counts （HPC）. Regression and principal component analyses indicated that HPC had a strong correlation with chloramine residual. Based on Chick-Watson＇s Law and the Monod equation, biostability curves under different conditions were developed to achieve the goal of HPC 100 CFU/mL. The biostability curves could interpret the scenario under various AOC concentrations and predict the required chloramine residual concentration under the condition of high AOC level. The simulation was also carded out to predict the scenario with a stricter HPC goal （≤50 CFU/mL） and determine the required chloramine residual. The biological regrowth control strategy was assessed using biostability curve analysis. The results indicated that maintaining high chloramine residual concentration was the most practical way to achieve the goal of HPC ≤ 100 CFU/mL. Biostability curves could be a very useful tool for biostability control in distribution systems. This work could provide some new insights towards biostability control in real distribution systems.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(13)60422-2