壳聚糖絮凝剂处理土豆生产废水的效果研究
首发时间:2007-05-30
摘要:土豆淀粉生产废水通常含有大量的蛋白质等有用物质,直接排放不但严重污染水体,增加废水处理单元负荷,而且造成资源的浪费。壳聚糖是阳离子型高分子絮凝剂,具有良好的吸附、生物降解性,用于土豆淀粉生产废水的处理具有其它絮凝剂不可替代的优势。用壳聚糖预处理食品废水,可以有效地吸附水中带负电荷的蛋白质胶体和微细颗粒,絮凝下来的污泥不用再次分离,可以直接作为动物饲料的添加剂。论文研究了用实验制得的壳聚糖絮凝剂处理土豆淀粉生产废水的絮凝效果和絮凝条件。研究了废水pH、壳聚糖投加量、废水温度和水力条件对贺凝效果的影响,确定了最佳絮凝条件。通过与处理奶制品废水最常用的海藻酸钠进行比较,证明了壳聚糖与海藻酸钠复合使用效果最好,絮凝pH范围广、处理效率高,运行经济。论文还对壳聚糖处理前后废水蛋白水解度做了测定,结果表明壳聚糖在吸附土豆废水蛋白时,更倾向于吸附大分子量的蛋白质。论文最后还对得到的蛋白粉的主要成分做了测定。
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Application of Chitosan to recycling of Potato protein in murphy-processing waste
Abstract:In general murphy-processing waste water contains abundant proteins. If it drained directly before treatment, pollute seriously the accepted water body. This would not only increase the burden of waste water treatment facilities, but also result in the waste of resources. Chitosan, deacetylated product of chitin, is a kind of natural,non-toxic organic polymer. It is a cationic polymeric flocculant, which has good adsorption properties and biodegradation. The most advantage of chitosan flocculant is to treat murphy-processing wastewater and can adsorb pxoteins with negative charge from wastewater efficiently. The chitosan-sludge can be used as an additive for pig food without further separation. The flocculating process and conditions in murphy-processing wastewater treatment are studied. By researching the effect of wastewater pH, chitosan dosage, temperature and milling condition on flocculating process, flocculating condition was determined. Through comparing with the flocculating performance of Sodium alginate, it proved the effect of chitosan and Sodium alginate compound is best. The scope of flocculating pH is broad, the processing efficiency is high and economical. The paper also mensurated the degree of hydrolysis of murphy-processing waste water flocculated around by chitosan. The result indicates, when chitosan adsorbs the potato protein, it adsorbed the macro-molecule weighted protein easily. The paper finally mensurate the basis of albumen powder.
Keywords: Chitosan Potato protein recycling
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No.1312712081011805****
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