摘要
通过研究生产废水回用对水质的影响,认为生产废水含固率是影响回用效果的重要评价指标,回用澄清池排泥水和滤池反冲洗水,对水质的影响规律相似。改善混凝条件的最佳含固率范围也是回用对水质影响最小的含固率范围。当含固率小于1%时,回用不会对水质造成影响,当含固率大于1%时,回用较无回用时的水质变差,但不会超过水质标准。回用生产废水可以提高有机物的去除率,主要是因为生产废水中含有的Al(OH)3沉淀物的物理吸附和卷扫絮凝功能。
Total dissolved solids （TDS） content was found to be the most important factor affecting reusability of water treatment plant （WTP） waste streams. Recycling of clarifier sludge and filter backwash water had similar effects on water quality. The TDS content that produced the best coagulation results had the least adverse effect on water quality upon recycling. Recycling a WTP waste with 〈1% in TDS did not affect water quality, a WTP waste with a much higher TDS may not be reusable because of its adverse effects on water quality, Recycling of the WTP wastes improved the organics removal in the subsequent water treatment process because of the enhanced physical adsorption and sweep flocculation contributed by Al（OH）3 in the waste samples,
出处
《环境污染与防治》
CAS
CSCD
北大核心
2006年第1期8-10,20,共4页
Environmental Pollution & Control
基金
国家"十五"科技攻关资助项目"城镇水环境关键技术"(No.2002BA806B04)
福建省厦门市科技发展基金资助项目(No.3502Z20027004)。
关键词
净水厂生产废水
含固率
回用
水质
Water treatment plant waste TDS Reuse Recycle Water quality
