Continuous foam separation processing of wastewater by using coagulant and protein

研究了一种新型的泡沫分离过滤污水处理系统，取代了城市污水处理系统中普遍采用的沉淀法。在该系统中，首先采用泡沫分离工艺去除悬浮物。然后，其余的悬浮物和溶解物通过过滤去除，这是预期的物理和生物处理。这些实验得到了以下结果：泡沫分离的最佳工艺条件为：流量为10 l/min (HRT为6 min)， PAC用量为20 mg/l，酪蛋白用量为10 mg/l。泡沫分离过程的浊度和总有机碳（TOC）去除率平均分别为87%和52%。泡沫分离出水中大部分有机物为易被生物分解的溶解物，采用过滤（过滤时间2h，过滤速率20m_/d）处理泡沫分离出水。结果如下：过滤后整个系统的平均浊度和TOC去除率分别达到92%和81%。

Instead of a popular sedimentation adopted in urban sewage treatment system, a new sewage treatment system composed of foam separation and filtration was studied.In the proposed system, at first, suspended matters are removed by foam separation process. Then the rest of suspended matters and dissolved matters are removed by filtration which is expected both physical and biological treatments.These experiments obtained the following results ; optimum conditions at foam separation process were that flow, PAC dosage and casein dosage were 10 l/min (HRT 6 min), 20 mg Al/l and 10 mg/l , respectively. The average of turbidity and total organic carbon (TOC) removals at the foam separation process were 87% and 52%, respectively. Most part of organic substances in effluent from the foam separation process was dissolved matters which were easily biological decomposed The effluent of foam separation process was treated by the filtration (HRT 2h, filtration rate 20m_/d). the result was as follows ; the average of turbidity and TOC removal through the whole system with the filtrarion reached 92% and 81%, respectively.