Enhanced chemical oxygen demand removal and flux reduction in pulp and paper wastewater treatment using laccase-polymerized membrane filtration
Journal
Journal of Hazardous Materials
Journal Volume
181
Journal Issue
1-3
Pages
763-770
Date Issued
2010
Author(s)
Abstract
The purpose of this present study is to investigate the removal efficiency of chemical oxygen demand (COD) from pulp and paper wastewater using laccase-polymerized membrane filtration process. The membranes with molecular weight cut-off (MWCO) of 5000 and 10,000, 30,000 and 54,000 were used in a cross-flow module to treat the pulp and paper wastewater containing high phenolic constituents and COD. With 2.98. IU/L of activated laccase applied at room temperature for 180. min, the contaminants in raw wastewater and second effluent were polymerized to form larger molecules with average molecular weight of 1300 and 900. Da (Dalton), respectively. With laccase polymerization prior to filtration, over 60% removals of COD by the four investigated membranes were observed, compared with low COD removal without laccase polymerization. Moreover, the addition of laccase resulted in 4-14% reduction of membrane permeability during the first 180. min filtration operation due to gel layer formation by the polymerization. No further flux decline was observed afterwards indicating the steady state was reached and the membranes could be used to remove the polymerized pollutants without significant fouling. The maximum apparent resistance occurrence for raw wastewater treated with laccase also supported the effectiveness for COD removal with laccase polymerization before membrane filtration. Additionally, pretreatment by inactivated laccase only caused further flux reduction without additional removal of COD. © 2010 Elsevier B.V.
Subjects
Chemical oxygen demand; Enzymatic degradation; Permeate flux; Polymerization; Pulp and paper
SDGs
Other Subjects
Apparent resistance; Average molecular weight; Chemical oxygen demand removals; COD removal; Cross flows; Enzymatic Degradation; Flux decline; Flux reduction; Gel layer formation; Laccases; Membrane filtrations; Membrane permeability; Molecular weight cutoff; Permeate flux; Pre-Treatment; Pulp and paper; Pulp and paper wastewater; Raw wastewaters; Removal efficiencies; Room temperature; Steady state; Biochemical oxygen demand; Degradation; Effluents; Gels; Membranes; Molecular weight; Oxygen; Paper; Phenols; Polymerization; Polymers; Pulp; Removal; Wastewater; Wastewater reclamation; Wastewater treatment; Microfiltration; laccase; phenol; artificial membrane; industrial waste; laccase; oxygen; phenol derivative; water pollutant; chemical oxygen demand; degradation; enzyme activity; filtration; industrial waste; membrane; pollutant removal; polymer; pulp and paper industry; waste treatment; wastewater; article; biofouling; chemical oxygen demand; crossflow filtration; effluent; gel permeation chromatography; membrane filter; membrane permeability; molecular weight; paper industry; polymerization; pulp mill; room temperature; steady state; waste water management; water contamination; artificial membrane; chemistry; filtration; industrial waste; isolation and purification; metabolism; paper; prevention and control; procedures; water management; water pollutant; Filtration; Industrial Waste; Laccase; Membranes, Artificial; Oxygen; Paper; Phenols; Water Pollutants, Chemical; Water Purification; Degradation; Effluents; Enzymatic Activity; Gels; Membranes; Molecular Weight; Oxygen; Paper; Phenols; Polymerization; Polymers; Pulps; Reclamation; Waste Waters; Filtration; Industrial Waste; Laccase; Membranes, Artificial; Oxygen; Paper; Phenols; Water Pollutants, Chemical; Water Purification
Type
journal article