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KMID : 0380020080230010083
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Korean Journal of Biotechnology and Bioengineering
2008 Volume.23 No. 1 p.83 ~ p.89
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Treatment of highly concentrated organic wastewater by high efficiency photocatalytic system
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Kim Jung-Kon
Kim Si-Wouk
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Abstract
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Food wastewater derived from the three-stage methane fermentation system developed in this lab contained high concentration organic substances. The organic wastewater should be treated through advanced wastewater treatment system to satisfy the "Permissible Pollutant Discharge Standard of Korea". In order to treat the organic wastewater efficiently, several optimum operation conditions of a modified photocatalytic system have been investigated. In the first process, wastewater was pre-treated with . The optimum pH and coagulant concentration were 4.0 and 2000mg/L, respectively. Through this process, 52.6% of CODcr was removed. The second process was photocatalytic reaction. The optimum operation conditions for the system were as follows: UV lamp wavelength, 254 nm; wastewater temperature, ; pH 8.0; and air flow rate, 40L/min, respectively. Through the above two combined processes, 69.7% of T-N and 70.9% of CODcr contained in the wastewater were removed.
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KEYWORD
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food wastewater, wastewater treatment, , , photocatalytic system
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