Combining Coagulation Process with Biological Pretreatment for APMP Effluents Treatment

Abstract:

The moderate pollution load of APMP effluents provides a chance for a new treatment process--combination of biological pre-treatment and coagulation treatment. Biological pre-treatment can reduce the pollution load and produce biomass at the same time. The removal of COD was 60.22% and the yield of biomass was 7.12g/L at the optimized conditions treated by Aspergillus niger. And the removal of acid-soluble lignin and color were up to 60% and 42.57%. The coagulation treatment was applied after bio-treatment by using alum and PAM as coagulation agent. The conditions of coagulation were optimized in this article. The optimized conditions were: Dosages of alum and PAM were 1000-1200mg/L and 2mg/L, pH is 5, stirring time is 30S at 300rpm, the temperature is 50°C. The coagulation removals of COD, color and turbidity were 83.80%, 86.38% and 98.33%. The removals of color were characterized by absorbance of 465nm, 325nm, 275nm and 254nm.

• Periodical: Advanced Materials Research (Volumes 113-116)
• Pages: 516-520
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.113-116.516
• Online since: June 2010
• Authors: Ting Zhi Liu, Hong Kai Li, Wei Jiang Duan, Hui Ren Hu
• Keywords: APMP, Aspergillus niger, Biological Pretreatment, Coagulation, Effluent, Flocculation

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