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Removal of suspended substances by coagulation and foam separation from municipal wastewater

机译:通过混凝和泡沫分离从城市废水中去除悬浮物

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摘要

A new method for solid-liquid separation for wastewater incorporating simple operation and shortened treatment time is necessary for improvement of sewage systems. In this study, removal of suspended solids from municipal wastewater by coagulation and foam separation using coagulant and milk casein was examined. By adding casein before the foam separation process, the removal of suspended substances was dramatically improved. The optimum condition for treating sewage was 20 mg-Fe/L of FeCl3, 3 mg/L of casein, and pH 5.5, which resulted in a removal rates of over 98% for turbidity and SS. A removal of 96-98% was also possible for phosphate and anionic surfactant. When PAC was used, the floc was also efficiently recovered in foam by the addition of casein. It became clear that coagulation and foam separation using casein as the collector is an effective method for removing suspended solids in municipal wastewater in a short time (within 10 min). [References: 15]
机译:为了改善污水处理系统,需要一种操作简便,处理时间短的固液分离新方法。在这项研究中,通过使用凝结剂和酪蛋白乳进行凝结和泡沫分离,从市政废水中去除了悬浮固体。通过在泡沫分离过程之前添加酪蛋白,可以大大改善悬浮物的去除。处理污水的最佳条件是20 mg-Fe / L的FeCl3、3 mg / L的酪蛋白和pH 5.5,这使得浊度和SS的去除率超过98%。对于磷酸盐和阴离子表面活性剂,也可以除去96-98%。当使用PAC时,还通过添加酪蛋白将絮凝物有效地回收到泡沫中。清楚的是,使用酪蛋白作为收集剂的凝结和泡沫分离是一种在短时间内(10分钟以内)去除市政废水中悬浮固体的有效方法。 [参考:15]

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