title: Assessment of electrochemical and chemical coagulation as post-treatment for the effluents of a UASB reactor treating cellulose pulp mill wastewater.
abstract: This paper presents results from exploratory experiments to test the technical feasibility of electrolytic treatment and coagulation followed by flocculation and sedimentation as post-treatment for the effluent of an UASB reactor treating simulated wastewater from an unbleached Kraft pulp mill. The electrolytic treatment provided up to 67% removal of the remaining COD and 98% of color removal. To achieve these efficiencies the energy consumption ranged from 14 Wh x l(-1) to 20 Wh x l(-1). The coagulation-flocculation treatment followed by settling required 350-400 mg x l(-1) of aluminium sulfate. The addition of a high molecular weight cationic polymer enhanced both COD and color removal. Both post-treatment processes are technically feasible.
authors.affiliation: Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Brazil.
authors.forename: A P
authors.initials: AP
authors.lastname: Buzzini
authors.forename: A J
authors.initials: AJ
authors.lastname: Motheo
authors.forename: E C
authors.initials: EC
authors.lastname: Pires
mesh_terms: D000534:Alum Compounds / Q000737:chemistry; D000693:Anaerobiosis; D001421:Bacteria, Anaerobic / Q000378:metabolism; D019149:Bioreactors; D002482:Cellulose; D003116:Color; D004572:Electrolysis; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D010100:Oxygen / Q000378:metabolism; D011108:Polymers / Q000737:chemistry; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods
chemical_list: D000534:Alum Compounds; D007220:Industrial Waste; D011108:Polymers; D012722:Sewage; C041524:aluminum sulfate; D002482:Cellulose; D010100:Oxygen