共查询到19条相似文献,搜索用时 125 毫秒
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由于印染废水具有高盐度,可生化性差,使常规方法难于处理完全。采用超滤和反渗透双膜技术处理实际印染废水,考察了不同超滤膜对废水的预处理性能,研究了BW30和CPA2两种反渗透膜在不同操作条件下对印染废水的处理效果,并分析了相关膜通量下降的原因。结果表明,超滤能有效地去除废水浊度和大分子有机物,为反渗透提供良好的进水水质。 相似文献
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The effect of fresh water recovery was studied during Black Sea water RO desalination with cellulose acetate tubular membranes. Two different schemes of brine pretreatment before RO were investigated.It was shown that ultrafiltration can be applied as an effective alternative method for Black Sea water pretreatment. Up to 30% recovery, the product flux as well as the salt and the specific ionic rejection are all fairly stable. Special experiments showed that in a stable turbulent regime Ca ions removal from Black Sea water before RO with tubular membranes hold out no technological advantages. 相似文献
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The experimental results on advanced treatment of secondary sewage effluent by ultrafiltration (UF) and reverse osmosis (RO) are presented in this paper, particularly focused on pretreatment system, operating condition, membrane cleaning system, and product water quality. 相似文献
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简要论述了反渗透海水淡化的各种新型膜法预处理技术研究进展情况及其在国内外的具体运用情况,内容主要涵括连续微滤技术(CMF)、浸没式帘式膜过滤、超滤技术、纳滤技术以及陶瓷膜过滤.并指出膜法预处理将成为今后反渗透海水淡化预处理的主要发展方向. 相似文献
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采用超滤-反渗透组合工艺处理温州市玫瑰刀剪有限公司电镀镍漂洗废水.整个系统经过6个月的运行,结果表明,由活性炭过滤器、孔径为50μm的精密过滤器和UF膜组成的预处理系统运行效果良好,预处理段产水的COD维持在5 mg·L~(-1)左右,SDI小于1,浊度小于0.1 NTU.同时,采用一级二段式反渗透膜将电镀废水浓缩5倍,对镍离子的截留率达99.9%以上,浓缩液直接回用到电镀镍槽.此外,整个系统的产水电导率维持在15μS·cm~(-1)以下,直接回用到电镀漂洗水槽. 相似文献
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Distillation vs. membrane filtration: overview of process evolutions in seawater desalination 总被引:3,自引:0,他引:3
The worldwide need for fresh water requires more and more plants for the treatment of non-conventional water sources. During the last decades, seawater has become an important source of fresh water in many arid regions. The traditional desalination processes [reverse osmosis (RO), multi stage flash (MSF), multi effect distillation (MED), electrodialysis (ED)] have evoluated to reliable and established processes; current research focuses on process improvements in view of a lower cost and a more environmentally friendly operation. This paper provides an overview of recent process improvements in seawater desalination using RO, MSF, MED and ED. Important topics that are discussed include the use of alternative energy sources (wind energy, solar energy, nuclear energy) for RO or distillation processes, and the impact of the different desalination process on the environment; the implementation of hybrid processes in seawater desalination; pretreatment of desalination plants by pressure driven membrane processes (microfiltration, ultrafiltration and nanofiltration) compared to chemical pretreatment; new materials to prevent corrosion in distillation processes; and the prevention of fouling in reverse osmosis units. These improvements contribute to the cost effectiveness of the desalination process, and ensure a sustainable production of drinking water on long terms in regions with limited reserves of fresh water. 相似文献