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印染废水中含有大量的染化料,对环境造成严重的污染。文中以3个印染厂为实例,介绍棉、涤纶、涤纶与锦纶混纺织物印染废水处理工艺流程及回用情况。结果表明,棉织物印染废水,经过预处理、生化处理、深度处理后,COD_(cr)值在200 mg/L以下,回用比例可达33%;涤纶织物印染废水,经过预处理、生化处理、深度处理后,COD_(cr)值60 mg/L以下,色度低于50度,回用比例可达33%;涤纶与锦纶混纺织物印染废水,经过预处理、深度处理后,COD_(cr)值在1 000 mg/L以下,锑含量在50 mg/L以下,回用比例可达33%;且3种回用水染色面料的颜色布面效果与原染液相当,可用于生产实践。 相似文献
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在分析印染废水的水质,并对比印染废水三大类处理技术即物化法、化学法和生化法的基础上,着重介绍了近年国内外几种常用的物化、化学、生化法及物理-化学-生物组合废水处理工艺。分析了近几年化学法处理印染废水的研究现状与存在的问题,并对未来化学法的研究方向进行了初步探究。 相似文献
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分析超声波处理强化印染废水的生化降解性、TiO2光催化降解印染废水以及电化学氧化处理印染废水的过程原理,探讨超声电化学与超声光催化分段处理印染废水的可行性。从理论上说,超声电化学与超声光催化分段处理具有高效、快速提高印染废水可生化性的作用,可应用于碱减量废水的预处理工段。 相似文献
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综述Fenton法及类Fenton法、臭氧法及其联合工艺、光催化氧化法、膜分离法、微电解法及其他强化联合工艺等废水深度处理技术的作用机理及其在国内外造纸废水处理中的应用进展。分析并指出了各种废水深度处理技术的优点以及存在的问题和解决办法,最后对未来该领域的研究方向与趋势进行了展望。 相似文献
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Comprehensive bench- and pilot-scale investigation of trace organic compounds rejection by forward osmosis 总被引:1,自引:0,他引:1
Forward osmosis (FO) is a membrane separation technology that has been studied in recent years for application in water treatment and desalination. It can best be utilized as an advanced pretreatment for desalination processes such as reverse osmosis (RO) and nanofiltration (NF) to protect the membranes from scaling and fouling. In the current study the rejection of trace organic compounds (TOrCs) such as pharmaceuticals, personal care products, plasticizers, and flame-retardants by FO and a hybrid FO-RO system was investigated at both the bench- and pilot-scales. More than 30 compounds were analyzed, of which 23 nonionic and ionic TOrCs were identified and quantified in the studied wastewater effluent. Results revealed that almost all TOrCs were highly rejected by the FO membrane at the pilot scale while rejection at the bench scale was generally lower. Membrane fouling, especially under field conditions when wastewater effluent is the FO feed solution, plays a substantial role in increasing the rejection of TOrCs in FO. The hybrid FO-RO process demonstrated that the dual barrier treatment of impaired water could lead to more than 99% rejection of almost all TOrCs that were identified in reclaimed water. 相似文献
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太阳纸业先通过气浮处理回收白水和纤维,然后通过预处理+厌氧+好氧的多级处理模式和废水综合治理系统,外排水质达到了南水北调IV类水标准。 相似文献