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Reuse of Weaving Wastewater with BAF Process  

Jung, Yong-Jun (Dept. of Environmental Engineering, Kyungpook National University)
Bae, Jong-Hong (Dept. of Environmental Engineering, Kyungpook National University)
Kwon, Koo-Ho (Dept. of Environmental Engineering, Kyungpook National University)
Min, Kyung-Sok (Dept. of Environmental Engineering, Kyungpook National University)
Publication Information
Journal of Korean Society on Water Environment / v.20, no.6, 2004 , pp. 664-669 More about this Journal
Abstract
An upflow BAF(Biological Aerated Filter) equipped with an expanded clay media was applied to reuse weaving wastewater of water jet loom. The performance of lab-scale biofilter was investigated by the adjustment of EBCTs(Empty Bed Contact Time) and the packing ratio of media, which were changed 1.1 to 3.7hr and 38 to 63%, respectively. In most conditions except 1.1hr of EBCT, BOD, CODcr, SS and Turbidity of the effluent were 1~4mg/L, 7~16mg/L, 1~5mg/L and 5~14NTU, where their removal efficiencies were 76~95%, 82~93%, 63~94% and 59~81%, respectively. From the observation of SEM(Scanning Electron Microscope) photographs of porous clay media, it was revealed that this media provided good performance of retaining microbes effectively. In addition, $0.44~0.49kgVSS/kgBOD_{rem}$. of low sludge reduction was expected. The most efficient back washing cycle and procedure were once per 4 to 9 days and air including collapse-pulsing method, respectively. Therefore, this system can be of use as an weaving wastewater treatment for reuse.
Keywords
BAF; Weaving wastewater; EBCT; Reuse;
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