1. Treatment of APMP pulping effluent based on aerobic fermentation with Aspergillus niger and post-coagulation/flocculation.
- Author
-
Liu T, He Z, Hu H, and Ni Y
- Subjects
- Acrylic Resins, Alum Compounds, Biological Oxygen Demand Analysis, China, Fermentation, Flocculation, Peroxides, Aspergillus niger metabolism, Paper, Waste Disposal, Fluid methods, Water Pollutants, Chemical metabolism, Water Purification methods
- 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., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
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