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造纸污水处理技术应用及展望

光博环保公司 2019-01-10

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  近年,废纸造纸行业发展的热点领域是污水的深度处理后回用,即将处理后的污水回用于生产,实现污水的封闭循环和零排放。这样,既可以满足环保要求,又节约水资源费,降低吨纸的生产成本,使企业获得巨大的经济效益、环境效益和社会效益,对于创建节约型社会、实行循环经济具有重要意义。目前欧洲和北美已有很多污水回用和零排放的工程实例,我国也在该领域进行着不懈的研究。大庆某纸箱厂采用混凝气浮-微滤工艺,对SS的去除率达到95%以上,出水SS质量浓度低于50mg/L,满足生产回用标准,实现了此类污水处理的零排放。江苏某纸厂的污水改造工程以壳聚糖作为混凝剂,采用混凝沉淀-生化工艺,对BOD5、COD和SS去除率分别达到86.16%、88.77%、99.34%,实现了污水的零排放。回用水的安全性问题是未来国内外废纸造纸污水深度处理与回用领域需要重点关注的问题。
     

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