生物絮凝剂的现状和发展

混凝沉淀法是使用广泛的水处理方法,混凝剂是其中的核心。与传统的混凝剂相比,生物絮凝剂具有无二次污染、安全无害等优点。介绍了几类主要生物絮凝剂的研究现状,并对其发展趋势作了简单的展望。     

On an ecology-friendly treatment reagent for oily wastewater

Bioflocculants have received increasing attention in research because they are low cost, non-toxic, biodegradable, operationally simple and useful in many water and wastewater treatment applications. In this study, we focused mainly on the screening of the flocculant-producing strain and its application in oily wastewater treatment. Bacteria strain B-6-1 was isolated by the pyridine screening method. UPC-1 reagent produced by B-6-1 had efficient flocculating activity. It was deduced that the main component of UPC-1 reagent was polysaccharide through purification and analysis. The influence of dosage of reagent, pH value, temperature and oil concentration on the flocculation effect of UPC-1 reagent was investigated.     

Characterization of an extracellular polysaccharide produced by Bacillus sp.RL-2

1 Introduction a Bioflocculation is a dynamic process resulting fromsynthesis of extracellular polymer by living cells.Flocculant are widely used in industrial processesincluding wastewater treatment, downstream pro-cessing, and food and fermentation processes [1-6].The flocculants used can be classified into three groups1) inorganic flocculants such as aluminum sulfate andpoly-aluminum chloride; 2) synthetic organic high-polymer flocculants such as polyacrylamide derivativesand polyethylene i…     

生物絮凝剂应用于松花江水处理的试验研究

该实验以生物絮凝剂为水处理材料,以松花江的水源水为被处理对象,将生物絮凝剂应用到动态流混凝沉淀试验.通过絮凝率验证絮凝剂应用于松花江水的处理效果,絮凝率达到85%,以及生物絮凝剂对浊度和色度有良好的去除效果,分别达到87%和70%,并且UV254去除率达到32%.同时,对松花江的水源水和絮凝后的沉降水进行色谱-质谱联机分析（GC/MS）,比较其中有机物的变化,结果显示,松花江原水中含有邻苯二甲酸二甲酯、邻苯二甲酸二乙酯和硝基苯等优先控制污染物被生物絮凝剂有效去除.