反渗透膜清洗剂的实验评价方法

添加阻垢剂是反渗透系统重要的预处理方法之一,但膜在运行中还是会被反渗透过程中沉淀出的不溶性物质所逐渐污染.为了克服污染,必须对膜进行的定期清洗.反渗透市场上每年都会推出新的清洗剂,如何评价这些反渗透清洗剂及销售商提供的清洗程序至关重要.文章提供一种快速、方便、可靠的膜清洗剂试验方法.     

用工业废碱水处理反渗透法高含盐排放浓水

反渗透处理装置排放的浓水含盐量很高,如果不经处理直接排放势必对周围环境造成污染和水的浪费,氧化铝生产工艺废水中含有大量的碳酸钠、苛性碱等碱类物质,pH值达到13左右,回水量约2000m^3／h,用这些废水和反渗透浓水混合进行软化处理,降低浓水中的钙镁离子含量,并对难去除的硫酸盐进行稀释降低浓度,回用到蒸发循环水系统作为补充用水、氧化铝生产部分工艺用水、设备冷却用水,达到浓水回收再利用的目的。该方案实施后效果十分显著,回收反渗透浓水约60m^3／h,减少污水系统补充新水,降低生产用水费用约每年176万元。     

膜处理与活性炭吸附技术在电镀废水回用工程的应用

采用膜处理与活性炭吸附技术处理电镀废水的达标排放水,并回用于生产工序中。长期运行结果表明：色度≤10、CODc,≤40mg/L、pH=6-9、浊度≤1NTU、污染指数（SDI≤5、余氯≤0．1mg/L、总铁≤0．25mg/L,出水水质稳定达刭该企业生产甩水标准需求,并创造了良好的经济效益与社会效益。     

A novel area efficient on-chip RO-Sensor for recycled IC detection

Out of different types of counterfeit integrated circuits (ICs) present in the supply chain, recycled ICs are major threat to security and reliability of electronic components. Recycled ICs possess shorter lifetime and it is extremely difficult to distinguish a recycled IC in a group of fresh IC with similar functionality. Out of several recycled IC detection methodology, Ring Oscillator (RO) sensor based detection approach is most efficient, because of its simple design and can detect ICs used only for few days. In this paper, we proposed two different types of modified RO sensor with lower area overhead. First RO sensor accelerates the aging to improve the detection of recycled ICs which are used for few days. The second architecture uses current controlled configurable RO (C-CRO) to further improve the detection of recycled IC. The RO in both the proposed sensor is designed by using modified pseudo NMOS logic based inverter. The proposed inverter accelerates the aging caused by negative bias temperature instability (NBTI) and lower the impact of process variation (PV) to improve the rate of detection. Both the proposed RO sensors are simulated in 90 nm CMOS technology. The simulation result shows both the proposed sensor improves the rate of detection as compared to the conventional sensor.     

KDF金属滤料运用在反渗透预处理系统中可行性的初步研究

考察了ＫＤＦ去除水中余氯、细菌、重金属离子及阻垢的效果，为ＫＤＦ在反渗透顶处理系统中的应用提供了可行性依据。     

Deposited Whey Protein Layers influence Solute Rejection in Reverse Osmosis

A membrane process is often accompanied by build-up of deposited layers on the membrane surface. Such layers change the performance of the system (e.g. the flux and rejection of solutes). Whey proteins were deposited on a reverse osmosis membrane to increase solute rejection. A gel-like deposited layer increased the rejection level of the system, while a porous deposited layer did not affect it. Further, in-situ denaturation of whey proteins helped to form the effective gel-like secondary membrane.     

新型野外饮水净化系统

针对石油、地矿等野外作业或边防驻军的饮水净化问题，采用ＤＯＷ公司反渗透膜，通过苦咸水水质调整，工艺以及预处理工艺研究，研制出结构合理、性能可靠的装置，在某边防部队应用状态良好，该设备在反渗透与预处理工艺的结合上有独到之处。引进的反渗透专用多级离心泵在节能和提高回收率方面有明显效果。     

污水深度回用反渗透膜面微生物污染机理试验研究

微生物污染是最复杂的膜污染形式,是污水深度回用反渗透设备运行过程关注的焦点。通过实验室静态试验和错流过滤动态试验研究了污水回用反渗透膜的微生物污染的机理和特性,结果表明:造成污染的微生物主要为杆菌和丝状菌;在没有微生物源及没有微生物生长和繁殖的必需营养物质的情况下,膜面基本不发生微生物污染;杀菌处理对于防止微生物污染很重要,已经污染的膜面更易于发生微生物污染,做好反渗透设备的停备用保护工作是防止微生物污染的必要手段。     

Surface properties of Reverse osmosis membrane

The morphology and structure of the top surfaces of three commercially Reverse osmosis (RO) membranes (Vontron Eviro‐Tech) have been studied using SEM and AFM techniques. As a result, the unevenness of the surface of ULP21 membrane was the greatest and that of SW21 membrane was smooth. The more the roughness of the top surface of the RO membranes was, the larger the flux of the RO membranes was. Accordingly, the roughness of the top surface of RO membranes intensively affected on the performance of RO membrane. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

反渗透工艺系统

本文简述了应用于地表水和地下水的七种反渗透 (RO)工艺系统 ,并且对如何防止在这些系统中出现的由于无机物的析出、颗粒的沉积 (胶体 )、有机物的吸附以及微生物的粘附和生长所导致的RO膜元件污堵的问题进行了分析与讨论