Flocculation process optimization of a novel coagulant for landfill leachate pretreatment
Sanitary landfill leachates are considered as heavily polluted industrial wastewaters, so special care is required for their efficient treatment and disposal. The most popular biological treatments are mostly the secondary stage in a combination with additional physical-chemical pre-process. A novel inorganic polymer flocculants, poly-ferric(Ⅲ)-magnesium(Ⅱ)-aluminum(Ⅲ)-sulfate (PFMAS in brief) is used to pretreat landfill leachate. Jar-test experiments are employed to investigate the effect of flocculation conditions such as PFMAS dosage, leachate pH, leachate temperature, and sedimentation time to organics removal. It is demonstrated that the removals of COD, BOD5 and color by coagulation with PFAMS can reach 67％, 56％ and 90％ respectively under the optimum conditions (including PFMAS dosage at 3.3g/L (Fe+Al+Mg), the leachate pH at 8.0, the leachate temperature at 20 ℃, and the sedimentation time at 50min, respectively), which greatly weakens its pollution extent and improves its visual appeal. Flocculation with PFMAS may be used as a useful pretreatment step for landfill leachate.
coagulation and flocculation inorganic polymer flocculants landfill leachate optimization removal
Yimin Sang Tichang Sun Jiaqing Chen Cunzhen Liang
College of Civil and Environmental Engineering University of Science and Technology Beijing Beijing, Department of Environmental Engineering Beijing Institute of Petrochemical Technology Beijing, China
国际会议
上海
英文
2996-2999
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）