搜索结果: 46-60 共查到“知识库 城市给水排水工程”相关记录119条 . 查询时间(0.431 秒)
Removal of radio N-nitrosodimethylamine (NDMA) from drinking water by coagulation and Powdered Activated Carbon (PAC) adsorption
radio N-nitrosodimethylamine (NDMA) drinking water coagulation and Powdered Activated Carbon (PAC) adsorption
2010/9/20
The presence of N-nitrosodimethylamine (NDMA) in drinking water supplies has raised concern over its removal by common drinking water treatment processes. However, only limited studies have been exami...
An innovative treatment concept for future drinking water production: fluidized ion exchange – ultrafiltration – nanofiltration – granular activated carbon filtration
treatment concept future drinking water production granular activated carbon filtration
2010/9/20
A new treatment concept for drinking water production from surface water has been investigated on a pilot scale. The treatment concept consists of fluidized ion exchange (FIEX), ultrafiltration (UF), ...
Technical Note: Community of bacteria attached on the PVDF MF membrane surface fouled from drinking water treatment, in Seoul, Korea
bacteria the PVDF MF membrane surface drinking water treatment
2010/9/20
Alpha, beta, and gamma proteobacteria comprise approximately 68, 16, and 7% of all identified bacteria. In this study, bacterial communities that had fouled polyvinylidene fluoride microfiltration mem...
［目的］ 探索天津市中水再生利用的有效途径。［方法］ 对高尔夫球场的湖泊、环沟场的中水进行了自然净化试验，并在室内水族箱中进行了人工控制试验。［结果］ 随着中水在蓄水池、环沟到东湖的逐级净化，氨氮由1.67 mg/L下降至1.38 mg/L， 硝酸态氮由9.43 mg/L下降至4.19 mg/L，亚硝酸态氮由0.18 mg/L下降至0.07 mg/L，无机氮由11.28 mg/L下降至5.68 m...
城市污水地下回灌的试验研究
城市污水 地下回灌 渗滤速度 氮的迁移与转化
2009/7/2
研究了应用SBR中试系统处理后的城市污水的深度处理工艺,并以地下回灌为目的,通过2个模拟土壤柱对比,分析了渗滤速度对地下回灌的影响,并讨论了土壤对氨氮的处理效果和在土壤中氮的迁移与转化。
Arsenic in drinking water: a worldwide water quality concern for water supply companies
Arsenic drinking water water supply companies
2010/9/20
For more than a decade it has been known that shallow tube wells in Bangladesh are frequently contaminated with arsenic concentrations at a level that is harmful to human health. By now it is clear th...
Verification of filter efficiency of horizontal roughing filter by Weglin's design criteria and Artificial Neural Network
filter efficiency horizontal roughing filter Weglin's design criteria Artificial Neural Network
2010/9/20
The general objective of this study is to estimate the performance of the Horizontal Roughing Filter (HRF) by using Weglin's design criteria based on 1/3–2/3 filter theory. The main objective of the p...
Hydraulic modelling of drinking water treatment plant operations
drinking water treatment plant Hydraulic modelling
2010/9/20
The flow through a unit of a drinking water treatment plant is one of the most important parameters in terms of a unit's effectiveness. In the present paper, a new EPAnet library is presented with the...
咸阳市地下水位动态变化特征
地下水位 年际变化 年内变化 咸阳市
2009/6/1
依据咸阳市1977 ～2006 年地下水监测资料, 对咸阳市不同地貌单元近30 年来地下水位的年际和年内变化特点进行了系统分析,
在研究时段内, 咸阳市地下水平均水位变化分为持续上升阶段( 1977 ～1987 年) 、持续下降阶段( 1988 ～2001 年) 和急剧升降阶段( 2002 ～2006 年) , 降雨量、蒸发量、地下水开采量、灌溉等自然和人为因素的综合影响是导致地下水位发生变化的...
“以缝代井列”——排水孔幕模拟方法探讨
渗流 排水井列 岩体
2009/5/15
在单个排水孔模拟方法即“以管代孔”法的基础上 ,将岩体中排水井列概化为一条等效窄缝 ,依据流量和水头等价原则 ,确定出等效窄缝的各向异性渗透系数与排水孔间距和岩体排水量之间的对应关系 ,进而提出了“以缝代井列”模拟岩体排水孔幕的新方法。该方法将等效窄缝作为岩体中一级导水结构单元 ,能模拟不同条件下的排水效果 ,既能反映实际条件 ,又便于工程应用 ,是模拟岩体排水的实用方法。
The Dutch secret: how to provide safe drinking water without chlorine in the Netherlands
The Dutch secret safe drinking water chlorine the Netherlands
2010/9/20
New developments in safe drinking water in the Netherlands include the adaptation of the Dutch drinking water decree, implementation of quantitative microbial risk assessment (QMRA) by water companies...
高效混凝处理浑江微污染水的中试试验
水处理 微污染水 低温低浊高色度
2009/3/5
以受到工业废水污染的吉林省浑江水源为研究对象，采用高效混凝沉淀净水技术在低温低浊期进行生产性中试试验。通过药剂筛选试验确定的最佳药剂配合条件为：聚合氯化铝铁30 mg/L与聚丙烯酰胺0.2 mg/L。设备生产性试验表明，在2.0～3.0 m3/h负荷范围内，保证处理出水满足工业用水水质标准。玻璃柱絮凝试验结果显示原水温度的上升对混凝效果是有利的。
城市供水自动化两级调度系统
城市 供水自动化 两级调度系统
2009/3/4
“城市供水自动化两级调度系统”现已在大同市自来水公司安装试运行。本系统由测量点和调度点通过无线／有线通信方式，构成测控网络。测量点包括水源井、测压点、用户和加压站，加压站内又分为泵房加压泵和清水池两测量点，调度点包括公司与水厂，自来水公司为第一级调度，水厂为第二级调度。自来水公司可以调度水厂和所有测量点，水厂只调度其所辖的测量点。
自来水公司和水厂安装有微机和无线数传机设备及天线系统。微机设备包...
Arsenic in drinking water: not just a problem for Bangladesh
Arsenic drinking water Bangladesh
2010/9/20
For more than a decade it has been known that shallow tube wells in Bangladesh are frequently contaminated with arsenic concentrations at a level that is harmful to human health. By now it is becoming...
Spatial and temporal variability of heavy metals in streams of the Flint Creek and Flint River Watersheds from non-point sources
Spatial and temporal variability heavy metals the Flint Creek and Flint River Watersheds non-point sources
2010/9/20
Throughout the United States, non-point pollution is responsible for large quantities of heavy metals entering bodies of water. Pollution as a result of heavy metals can impact drinking water supplies...