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针对西北村镇集雨窖水含浊、低温、微污染,采用常规混凝工艺效果不佳的情况,通过试验考察了单独采用高锰酸钾预氧化、单独投加粉末活性炭以及高锰酸钾与粉末活性炭联用3种工艺对常规混凝的强化效果,并对影响强化混凝效果的高锰酸钾和粉末活性炭不同投加量和投加顺序进行试验研究。结果表明:KMnO_4与PAC联用具有最佳的强化混凝效果,在常规混凝的最佳条件下,当KMnO_4的最佳投量为2 mg·L~(-1),预氧化时间为15 min,而PAC的最佳投量为10mg·L~(-1),并且在投加混凝剂后3 min投加,则经强化混凝后的窖水浊度和COD_(Mn)的去除率可达98.5%和56.6%;两者联用具有协同增效作用。
Aiming at the problems of turbidity, low temperature and slight pollution in rainwater pit collection in northwestern villages, the effect of conventional coagulation process is not good. The effects of single pretreatment with potassium permanganate, powdered activated carbon and potassium permanganate Powdered activated carbon combined with three kinds of technology for the conventional coagulation strengthening effect, and the effects of strengthening the coagulation effect of potassium permanganate and powdered activated carbon different dosage and dosage sequence for experimental study. The results showed that KMnO_4 and PAC had the best effect of coagulation and coagulation. Under the optimal conditions of conventional coagulation, when the optimal dosage of KMnO_4 was 2 mg · L -1, the pre-oxidation time was 15 min, and the optimum dosage of PAC was 10 mg · L -1, and dosing at 3 min after adding coagulant, the turbidity and COD Mn removal efficiency Rates up to 98.5% and 56.6%; synergy between the two synergies.