文章采用混凝技术提取木薯黄浆废水中的植物蛋白质物质，实验通过选取最佳的混凝剂和助凝剂种类及其最佳用量，并研究 pH、沉淀时间对混凝效果的影响，为木薯黄浆废水的资源化利用提供科学依据。单因素实验结果表明：分别以1%的PAC、1%的氯化铁和1%的改性玉米淀粉处理木薯黄浆废水，三种絮凝剂的最佳投加量分别为0.133g/L、0.133g/L和0.05g/L，最佳絮凝pH分别为9、2和8，三种絮凝剂的沉淀时间均大于15min时处理效果较佳，此时木薯黄浆淀粉废水的浊度去除率均到达80%以上，COD去除率达到50%。复配实验结果表明：PAC与PAM的复配投加后，PAC投加量为0.02g/L，PAM投加量为0.002g/L，浊度去除率从80%左右上升至98.2%，COD去除率上升至51.8%，复配絮凝剂相比单一絮凝剂提取植物蛋白效果更好。%The purpose of this study is trying to use technology for cassava starch production coagulation pretreatment of wastewater, which includes selecting the best coagulant type, determine coagulant, the optimum coagulant dosage, pH studies on mixed coagulation effect for the comprehensive management of cassava starch wastewater to provide some design parameters. Experimental results that the single factor, 0.1%PAC and 1%ferric chloride dosage 0.133g/L, 1%modified corn starch dosage0.05g/L, ferric chloride optimum pH was 2, PAC and corn starch optimal pH were 9 and 8, the settling time process is effective when more than 15min. Through traditional flocculants in yellow cassava pulp wastewater to determine the cationic polyacrylamide (PAM) and aluminum chloride (PAC) compound used better. PAM and the PAM complex volume ratio is 10:1. PAC dosage can be reduced twice, turbidity removal efficiency rise to 98.2% from 80%, showing that not only enhances the compound flocculant flocculation effect, but also reduces the pharmaceutical dosage.
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