检索结果-南通市图书馆

Phosphorus limitation on bacterial regrowth in drinking water

Journal of Environmental Sciences 2003年第6期15卷 773-778页

作者： SANGJun-qiang ZHANGXi-hui YUGuo-zhong WANGZhan-sheng ResearchCenterforEnvironmentalEngineeringandManagement ShenzhenGraduateSchoolTsinghuaUniversityShenzhen518057China. DepartmentofEnvironmentalScienceandEngineering TsinghuaUniversityBeijing100084China

Assimilable organic carbon(AOC) test and bacterial regrowth potential(BRP) analysis were used to investigate the effect of phosphorus on bacterial regrowth in the drinking water that was made from some raw water taken from a reservoir located in northern China. It was shown that AOC of the drinking water samples increased by 43.9%—59.6% and BRP increased by 100%—235% when 50 μg/L PO 3- 4-P(as NaH 2PO 4) was added alone to the drinking water samples. This result was clear evidence of phosphorus limitation on bacteria regrowth in the drinking water. This investigation indicated the importance of phosphorus in ensuring biological stability of drinking water and offered a novel possible option to restrict microbial regrowth in drinking water distribution system by applying appropriate technologies to remove phosphorus efficiently from drinking water in China.

关键词： drinking water bacterial regrowth phosphorus AOC biological stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Logistic Regression for Prediction and Diagnosis of bacterial regrowth in Water Distribution System

引用

Transactions of Tianjin University 2009年第5期15卷 371-374页

作者：董丽华赵新华吴卿杨幼安 School of Environmental Science and Engineering Tianjin University People's Liberation Army 93756

This paper focuses on the quantitative expression of bacterial regrowth in water distribution system. Considering public health risks of bacterial regrowth,the experiment was performed on a distribution system of selected ***,chemical,and microbiological parameters such as turbidity,temperature,residual chlorine and pH were measured over a three-month period and correlation analysis was carried *** with principal components analysis(PCA) ,a logistic regression model is developed to predict and diagnose bacterial regrowth and locate the zones with high risks of microbiology in the distribution *** model gives the probability of bacterial regrowth with the number of heterotrophic plate counts as the binary response variable and three new principal components variables as the explanatory *** veracity of the logistic regression model was 90%,which meets the precision requirement of the model.

关键词： bacterial regrowth water distribution system heterotrophic plate counts logistic regression principal components analysis odds ratio veracity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modification on the conventional procedure to measure AOC in drinking water

引用

Journal of Environmental Sciences 2004年第6期16卷 996-1000页

作者： LIFu-zhi SANGJun-qiang ZHANGXi-hui WANGZhan-sheng ResearchCenterforEnvironmentalEngineering＆Management ShenzhenGraduateSchoolTsinghuaUniversityShenzhen518055China DepartmentofEnvironmentalScienceandEngineering TsinghuaUniversityBeijing100084China

Additional phosphorus will be introduced to water sample if the conventional procedure is used to measure assimilable organic carbon(AOC) in drinking water. It has been shown that there are the cases that phosphorus is the limiting nutrient for microbial growth in drinking water. The measured value of AOC would not be able to indicate appropriately the regrowth potential of bacteria in this case. The conventional procedure used to measure AOC was modified to avoid the introduction of additional phosphorus to water sample in this study. It was shown that it was feasible to measure AOC in water using the modified procedure. Furthermore, the measured value of AOC determined by the modified procedure could indicate appropriately the regrowth potential of bacteria in drinking water despite either organics or phosphorus was the limiting nutrient for bacterial regrowth.

关键词： drinking water assimilable organic carbon bacterial regrowth phosphorus organics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：