Enhanced chemical oxygen demand removal and flux reduction in pulp and paper wastewater treatment using laccase-polymerized membrane filtration

Journal of Hazardous Materials
Chun-Han Ko, Chihhao Fan

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 f...Continue Reading

References

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Jul 15, 2006·Journal of Hazardous Materials·Ebru Cokay Catalkaya, Fikret Kargi
Mar 21, 2007·Journal of Hazardous Materials·Meijuan XuYueli Hao
Jun 30, 2007·Bioresource Technology·Chun-Han Ko, Shiao-Shing Chen
Jul 10, 2009·Journal of Hazardous Materials·Anjali Singhal, Indu Shekhar Thakur

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Citations

Jan 18, 2011·Water Research·Hector A GarciaDesmond F Lawler
Sep 28, 2010·The Science of the Total Environment·Nurdan Buyukkamaci, Emre Koken
Jun 24, 2014·Ecotoxicology and Environmental Safety·Mohammadreza Kamali, Zahra Khodaparast

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