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Simultaneous Removal of Organic and Nitrogen in the Treatment of Fish Processing Wastewater using Entrapped Mixed Microbial Cell (EMMC) Process  

Jeong, Byung Cheol (Jinjuham Co., Ltd.)
Park, Kwon Sam (Department of Food & Biotechnology, Kunsan National University)
Jeong, Byung Gon (Department of Environmental Eng., Kunsan National University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.3, 2006 , pp. 492-497 More about this Journal
Abstract
Feasibility of simultaneous removal of organic materials and nitrogen in the wastewater from fisheries processing plant was evaluated using entrapped mixed microbial cell (EMMC) process. The experiment was performed using activated sludge from municipal sewage treatment plant which was immobilized with gel matrix by cellulose triacetate. It was found the stable operation at the treatment system which is composed of anoxic and oxic tank, was possible when the organic and nitrogen loading rates were increased stepwise. The organic and nitrogen loading rates were conducted from 0.65 to $1.72kgCOD/m^3/d$ and from 0.119 to $0.317kg\;T-N/m^3/d$ with four steps, respectively. The maximum nitrogen loading rate which could satisfy the regulated effluent standard of nitrogen concentration, was $0.3kg\;T-N/m^3/d$. The removal efficiency of total nitrogen was decreased apparently as increasing nitrogen loading rates, whereas the removal efficiency of ammonium nitrogen was effective at the all tested nitrogen loading rates. Therefore, it was concluded that nitrification was efficient at the system. Nitrate was removed efficiently at the anoxic tank. whereas the nitrification efficiency at the oxic tank ranged 94.0% to 96.9% at the tested loading rates. The removal efficiencies of chemical oxygen demand (COD) and those of total nitrogen at the entire system ranged from 94.2% to 96.6% and 73.4% to 83.4%, respectively.
Keywords
COD; Entrapped Mixed Microbial Cell (EMMC) process; Fish processing wastewater; T-N;
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