我国膜技术与应用的现状和发展趋势

论述了我国的膜技术发展状况和膜技术在废水回用、有机物去除及造水等领域的应用,介绍了膜技术的发展趋势及膜技术最新的进展。     

污泥循环再利用技术在油田废水处理中的应用

通过对中原油田含油污泥的再利用进行实验研究,得到结果:污泥的平均固含量为75.18%,含水量为24.82%,污泥含油量5.4%;污泥中碳酸钙含量62.15%,碳酸镁含量15.295%,氯化钠含量2.696%;在废液与污泥的掺入比例小于1:4的条件下,废液得到有效净化。污泥循环再利用技术的实施,降低了污泥产生量。     

焦化废水深度处理及回用技术方案探讨

对我国当前焦化废水深度处理技术的研究应用情况以及回用现状进行了介绍,分析了焦化废水回用中存在的问题,并提出了改进方案。     

Chemical fractionation of Cu and Zn in stormwater, roadway dust and stormwater pond sediments

This study evaluated the chemical fractionation of Cu and Zn from source to deposition in a stormwater system. Cu and Zn concentrations and chemical fractionation were determined for roadway dust, roadway runoff and pond sediments. Stormwater Cu and Zn concentrations were used to generate cumulative frequency distributions to characterize potential exposure to pond-dwelling organisms. Dissolved stormwater Zn exceeded USEPA acute and chronic water quality criteria in approximately 20% of storm samples and 20% of the storm duration sampled. Dissolved Cu exceeded the previously published chronic criterion in 75% of storm samples and duration and exceeded the acute criterion in 45% of samples and duration. The majority of sediment Cu (92-98%) occurred in the most recalcitrant phase, suggesting low bioavailability; Zn was substantially more available (39-62% recalcitrant). Most sediment concentrations for Cu and Zn exceeded published threshold effect concentrations and Zn often exceeded probable effect concentrations in surface sediments.     

再生水中NO_3~--N、NO_2~--N、NH_4~+-N在粉土介质中迁移转化的研究

通过土柱实验模拟再生水在粉土层下渗过程中NO3--N、NO2--N、NH4+-N的迁移转化规律。结果表明,实验温度为23.2～25.9℃时,土柱内发生反硝化反应,NO3--N的去除率为9.74%～39.16%,反应符合一级反应动力学方程,衰减系数为0.0968～0.5531m-1;实验温度低于19℃时,土柱内反硝化反应消失,说明低温是制约再生水在土柱内发生反硝化作用的主要因素。     

废弃印刷线路板资源化处理的研究进展

介绍了当前废弃印刷线路板资源化处理的主要方法,包括湿法、火法、机械法、生物法、超临界流体法和等离子体熔炼法等。综述了各种处理方法的侧重点及利弊;提出热解法与机械法联用可较好地解决在破碎过程中所遇到的问题,具有较大优势,可作为未来大量废弃印刷线路板资源化处理工艺研究的重点。     

石灰处理在电厂回用水处理中的应用研究

通过对河北2个电厂进行的回用水石灰处理试验,确定对不同回用水处理的控制指标,考察石灰处理的效果及特点。试验证明石灰处理用于电厂回用水处理是可靠的。     

洗浴中水回用可行性分析

以某城市模块的公共浴室和洗衣房排水为处理对象,研究采用合适可行的工艺流程进行处理。技术和经济分析结果表明,采用混凝沉淀+过滤+消毒的处理工艺对洗浴排水进行处理,出水达到中水回用要求。     

Improving Energetic Performance and Water Usage in an Industrial Ethanol Distillery

In this paper, a case study based on an industrial process of ethanol distillation was undertaken. It was aimed to improve the energy and water usage in the process. Pinch Analysis concepts were used to propose a new heat exchanger network and a study was undertaken to the water reuse. The minimization of wastewater is achieved through the exploitation of recycle and reuse opportunities by process modifications. Through these studies, a new streams circuit was obtained, which resulted in a lower consumption of steam and in a reduction in the volume of water collecting of 12 m³ to 1 m³ per tons of crushed sugar cane. Process changes and economical viability were presented. Two kinds of equipment were studied, cooling towers and aspersion tanks.     

水处理技术发展对电力工业水循环利用的经济性影响

讨论了一些为提高生产力和降低成本而发展起来的废水零排放或水回收循环利用前沿技术,并将这些技术的经济性与原有的水循环利用系统进行比较.