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通过滤前投加絮凝剂的方式,可降低滤后浊度,同时为明确絮凝剂投加后水质的变化情况,开展了基于颗粒计数的滤池微絮凝生产性试验。结果表明,投加絮凝剂后,滤池进水颗粒物数量明显增加,经过滤后对水体中小颗粒的去除率从不足60%提高到80%以上,颗粒物的数量明显下降,滤池出水浊度降低;絮凝剂投加量为3 mg/L时,较为适宜;投加絮凝剂可抵御原水水质变化,但缩短了滤池运行周期。
By adding flocculants before filtration, the turbidity of the filter can be reduced. At the same time, to make clear the change of water quality after the addition of flocculant, the flocculation productivity test of the filter based on particle count was carried out. The results showed that after the flocculant was added, the amount of particulate matter infiltrated by the filter increased obviously. After the filtration, the removal rate of small particles from less than 60% to more than 80%, the amount of particulate matter decreased significantly and the turbidity of the filter effluent decreased When the flocculant dosage is 3 mg / L, it is more suitable; adding flocculant can resist the change of raw water quality, but shorten the operation cycle of the filter.