Study on Coagulation Pretreatment of Laboratory Wastewater
The wastewater discharged from laboratories does harm to the environment, and there is no mature treatment method of it. According to the characteristics of laboratory wastewater, the coagulation treatment of the laboratory wastewater using inorganic polymer flocculants, such as PAC and PFS, was studied in this paper. The coagulation factors also studied include the optimum dosages of these flocculants, the pH value, the settling time and the different wastewater quality. The following research results were obtained: (1) PAC was the most appropriate flocculant in coagulation treatment of laboratory wastewater. (2) It can obtain the best effect when the dosage of PAC was 80mg/l, pH was 5 and the settling time was 30min.On this condition, the removal rate of turbidity was more than 95％, and the removal rate of COD was more than 40％. (3) Coagulation treatment can be a unit of laboratory wastewater processing, having a good pretreatment effect, Lay good foundation for the follow-up processing.
laboratory wastewater formatting style polyaluminium chloride
Guo Aihong Niu Fusheng
College of Resources and Environment Hebei Polytechnic University Tangshan, China
国际会议
上海
英文
3695-3697
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）