State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, PR China; Sichuan Environmental Protection Key Laboratory of Groundwater Antipollution and Resource Security, Chengdu 610059, PR China.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, PR China; College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, PR China.
Bioresour Technol. 2014 Jun;162:184-91. doi: 10.1016/j.biortech.2014.03.124. Epub 2014 Mar 29.
A complex bioflocculant MBF917 was prepared by Rhizopus sp. M9 and M17 using potato starch wastewater (PSW) as nutrilite, and its flocculation characteristics of treating PSW were studied. Culture conditions of the two strains were optimized, and flocculating conditions of the bioflocculant for treating PSW were also investigated. The optimal and economical culture conditions were determined as COD of about 1600 mg/L, 0.3 g/L urea and 0.04 g/L potassium dihydrogen phosphate, with no need of adding carbon sources or adjusting pH. When the bioflocculant was used to flocculate PSW, the optimal dosage was 0.1 mL/L with addition of 5 mL/L 10% CaCl2 as coagulant aid, and there was no need to adjust pH. After flocculation, COD and turbidity removal rates of the PSW could reach 54.09% and 92.11%, respectively, and 1.1g/L proteic substance was recycled from the PSW as a byproduct that could be used for animal feed.
一种复杂的生物絮凝剂 MBF917 是由 Rhizopus sp. M9 和 M17 使用马铃薯淀粉废水 (PSW) 作为营养物制备的，研究了其处理 PSW 的絮凝特性。优化了两种菌株的培养条件，并研究了生物絮凝剂处理 PSW 的絮凝条件。确定了最佳和经济的培养条件为 COD 约 1600mg/L、0.3g/L 尿素和 0.04g/L 磷酸二氢钾，无需添加碳源或调节 pH 值。当生物絮凝剂用于絮凝 PSW 时，最佳用量为 0.1mL/L，并添加 5mL/L 10%的氯化钙作为助凝剂，无需调节 pH 值。絮凝后，PSW 的 COD 和浊度去除率分别可达 54.09%和 92.11%，并从 PSW 中回收 1.1g/L 的蛋白质物质作为副产品，可用于动物饲料。
