共查询到18条相似文献,搜索用时 656 毫秒
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根据内压式超滤膜和外压式超滤膜组件在冶金污水回用处理工程中的实际应用,从运行参数、出水水质、清洗周期等方面对两者进行了综合分析比较,同时分析了超滤膜污染的成因、工艺优化采取的措施。结果表明,外压式超滤膜跨膜压差的稳定性和产水透过率优于内压式超滤膜,2种膜的产水水质接近,外压式超滤膜的化学清洗周期是内压式超滤膜的3倍,外压式超滤膜更适用于大流量冶金污水反渗透脱盐的预处理。 相似文献
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选取两种内压式中空纤维超滤膜组件,从膜材质、运行参数和出水水质等方面对这两种组件在海水淡化反渗透预处理中的应用进行比较。结果表明:2#膜组件跨膜压差和膜通量的稳定性较1#组件好,两种膜组件出水水质比较接近,但2#膜出水水质稳定性较1#膜好。 相似文献
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纳滤膜在火电厂循环冷却水处理中的应用 总被引:5,自引:0,他引:5
简要介绍了纳滤膜的定义和原理,针对原水的水质,设计了纳滤膜工艺,提出了纳滤膜在火电厂循环冷却水处理中应用的工艺流程和预处理、膜组件的设计运行参数。运行结果表明,出水水质达到循环冷却水补充水的要求。在此基础上,以3×104m3/d规模为例,分析了纳滤膜处理工艺的投资和运行费用。对工程的经济效益比较得出,纳滤膜是一种经济、可行的循环冷却水处理工艺。 相似文献
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以山东某大型焦化厂焦化废水常规生化处理出水为原水,采用多介质过滤器—中空纤维超滤膜—DEC吸附树脂过滤器—反渗透膜工艺进行深度处理。结果表明:DEC吸附树脂过滤器出水COD小于60 mg/L,COD去除率大于69%,总氰化物0.2 mg/L,NH_3-N5 mg/L,SS5 mg/L,色度20倍,稳定运行周期大于36 h,出水满足GB16171—2012《炼焦化学工业污染物排放标准》排放要求。DEC吸附树脂过滤器冲洗和再生废水采用纳滤膜回收,产水用于DEC冲洗和树脂再生补水。反渗透膜处理系统水回收率大于65%,稳定运行周期大于70 d。产水电导率小于100μS/cm,浊度小于0.1 NTU,COD小于10 mg/L,满足《污水再生利用工程设计规范》(GB 50335—2002)中循环水冷却水补水水质标准要求,可回用焦化生产。 相似文献
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Ultrafiltration (UF) of treated municipal wastewater has been used to produce high-quality reuse water for different applications. However, without pre-treatment, secondary treated wastewater effluent shows high fouling potential and reduces the performance of UF membrane filtration significantly. To remove foulants prior to UF, slow sand filtration (SSF) was investigated in the present work. Two pilot-scale slow sand filters were operated in tandem with UF. The performance of the UF plant was improved to a large extent by delivering slow sand filtrate compared to direct secondary effluent filtration. Removal of common organic fouling indicators (i.e., proteins, carbohydrates, and biopolymers) by SSF was significantly higher at 0.25 m/h versus 0.5 m/h filter loading rate. Results of a comparative analysis of SSF effluent characteristics and UF performance showed that the biopolymer content detected by size exclusion chromatography displayed a good correlation with the filterability of corresponding water sample by UF, while photo-metrically detected proteins and polysaccharides did not present any relationship with UF performance. 相似文献
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某冷轧厂排放的废水中污染物种类多、浓度高,且废水水质水量变化较大,属高浓度、难降解废水。经采用双膜法对废水进行深度处理,系统运行稳定,脱盐率达96%以上,出水水质满足循环水补充水要求,废水回收率达65%以上。本文对该处理系统超滤、反渗透等的运行效果进行了叙述和分析。 相似文献
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