title: Treatment of APMP pulping effluent based on aerobic fermentation with Aspergillus niger and post-coagulation/flocculation.
abstract: A novel two-stage biological/flocculation process was developed for treating the pulping effluent from the alkaline peroxide mechanical pulping (APMP) process. In the first biological stage, the aerobic fermentation by using Aspergillus niger can decrease the chemical oxygen demand (COD) by about 60% while producing about 7 g/l of solid biomass. In the second stage (post-coagulation/flocculation), the residual COD, turbidity and color, can be further decreased by using alum and polyacrylamide (PAM). The overall removal efficiencies of COD, color and turbidity from the APMP pulping effluent by the above two-stage biological-coagulation/flocculation process were 93%, 92% and 99%, respectively, under the conditions studied.
authors.affiliation: Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China. liutzhi3260@hotmail.com
authors.forename: Tingzhi
authors.initials: T
authors.lastname: Liu
authors.forename: Zhibin
authors.initials: Z
authors.lastname: He
authors.forename: Huiren
authors.initials: H
authors.lastname: Hu
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Ni
mesh_terms: D000180:Acrylic Resins; D000534:Alum Compounds; D001234:Aspergillus niger / Q000378:metabolism*; D057919:Biological Oxygen Demand Analysis; D002681:China; D005285:Fermentation; D005427:Flocculation; D010209:Paper; D010545:Peroxides; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D000534:Alum Compounds; D010545:Peroxides; D014874:Water Pollutants, Chemical; D000099166:Polyacrylamides; C041524:aluminum sulfate