生产废水回流对低浊原水净水工艺影响实例分析

为了研究生产废水回用后对净水厂净水工艺的水质影响,对BW水厂生产废水回流工艺实际的数据进行了对比分析.通过对BW水厂流量和物质守恒的分析,得出生产废水中污染物质的最终走向是随泥饼外运排除;通过对BW水厂每个净水环节水质的各项指标进行检测,发现生产废水回流不会对低浊原水水质处理造成影响,金属物质、三卤甲烷、聚丙烯酰胺不存在富集的现象;同时,由于生产废水中存在大量的颗粒胶体、破碎的絮体,含有未完全反应的絮凝剂、腐殖酸等物质,与原水混合后强化了混凝效果,提高了出水水质.结果表明:废水回流工艺节约了原水资源,强化了低浊水的混凝效果,并且对出厂水水质的安全性影响不大.

Study of Reusing Production Wastewater in Low Turbidity Raw Water Purification Process

In order to study the impacts of production wastewater recycle in water purification process, the performance data of production wastewater recycle process were compared at BW drinking water treatment plant. On the basis of flow and material conservation, the pollutants were removed by water purification system and were discharged by the exclusion of mud cake. Through the testing of the water quality indexes, wastewater recycle would not make adverseimpact on the water quality of low turbid raw water treatment, and the metals, trihalomethanes, and polyacrylamide would not get enrich. Due to the presence of large numbers of colloidal particles, broken floc and incomplete reaction flocculants, humic acid and other substancesin wastewater, coagulation will be enhanced and water quality will beimproved after mixing with raw water. The results show that the wastewater recycle process can save water resources, enhance the low turbidity water coagulation effect, and have little effect on the safety of plant effluent water quality.