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Water Science & Technology Vol 55 No 1-2 pp 27–33 © IWA Publishing 2007 doi:10.2166/wst.2007.016
Continuous removal of hydrogen peroxide with immobilised catalase for wastewater reuse
D.S. Yoon*,**, K. Won*, Y.H. Kim*,***, B.K. Song*, S.J. Kim****, S.-J. Moon* and B.S. Kim**
*Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon, 305-343, Korea (E-mail: kwon@krict.re.kr)
**Department of Chemical Engineering, Chungbuk National University, 12 Gaesin-dong, Heungduk-gu, Cheongju, 361-763, Korea
***Department of Chemical Engineering, Kwangwoon University, 447-1 Wolgye-dong, Nowon-gu, Seoul, 139-701, Korea
****Green and Global EnviTech Co., 39-3 Seongbok-dong, Yongin, 449-795, Korea
ABSTRACT
Hydrogen peroxide was continuously removed for wastewater reuse using an immobilised biocatalyst. A commercial catalase, which is an enzyme to decompose hydrogen peroxide to water and oxygen, was entrapped in chitosan beads. Hydrogen peroxide in aqueous solutions of varying pH, temperature and concentration was continuously removed through a reactor containing the catalase-entrapped chitosan beads at high efficiency for 24 h. Additional silicate coating of the chitosan beads resulted in significant improvements in the catalase performance under harsh conditions, which are often found in peroxide-based industrial processes. We expect that immobilisation of catalases can enhance their applicability for continuous degradation of hydrogen peroxide for wastewater reuse.
Keywords: Catalase; chitosan; hydrogen peroxide; immobilisation; silicate coating; wastewater reuse
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