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以某水厂活性炭滤池出水进行试验,研究预氧化一微絮凝联用技术对污染物去除性能的影响。结果表明待滤水经过氧化剂预氧化后再投加絮凝剂,相比单独投加絮凝剂可改善出水水质。在仅投加氧化剂时水体中并没有絮凝现象,而继续投加絮凝剂后絮体大而密实,说明氧化剂具有良好的助凝作用。就试验评价指标效果来说,高锰酸钾效果最好,过氧化氢次之,次氯酸钠效果最差,COD_(Mn)去除效果随出水颗粒数降低而增加。通过试验可知,不同水体所需预氧化剂的投加量不同,实际中针对不同水体需考察预氧化剂的最适宜投加量。
A water plant activated carbon filter effluent test to study the impact of a pre-oxidation a micro flocculation combined with the removal of pollutants on the performance. The results showed that the water to be filtered through the oxidizer before adding flocculant, compared with separate flocculant can improve water quality. When adding only oxidant, there is no flocculation phenomenon in the water, but flocculation is large and dense after adding the flocculant, which shows that the oxidant has a good coagulant-supporting effect. In terms of the experimental evaluation index, potassium permanganate had the best effect, followed by hydrogen peroxide, sodium hypochlorite had the worst effect and COD_ (Mn) removal efficiency increased with the decrease of effluent particle number. According to the experiment, the dosage of pre-oxidant required by different water body is different. In practice, the optimum dosage of pre-oxidant should be investigated according to different water bodies.