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Reduction of the Nitrogen in the Secondary Effluent by the Hybrid Sequential Aerobic-Anoxic Natural System  

Kim, Young-Chul (Department of Environmental Engineering, Hanseo University)
Chung, Paul-Gene (Department of Environmental Engineering, Chonbuk National University)
An, Ik-Sung (Lotte Engineering & Construction)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.3, 2005 , pp. 323-329 More about this Journal
Abstract
In this paper, performance of a hybrid sequential aerobic-anaerobic natural system was investigated. Continuous aerobic and anoxic conditions were created by alternatively placing waste stabilization pond (WSP) and wale. hyacinth pond (WHP). Two pilot-scale treatment lines were built and operated; The first consists of WSP integrated with WHP and the second of WSP connected with Dark Pond(DP), namely control system ponds which were used to examine the effects of water hyacinth on nitrification and de-nitrification. The overall performance in nitrogen was 86% reduction in WSP-WHP and 36% in WSP-control pond system. Nitrogen was mostly removed by nitrification and de-nitrification which simultaneously occurred in the same water hyacinth ponds. For the de-nitrification, benthic layer was found out to be adequate support as a carbon source. In addition, WSP-WHP system was very effective in reducing phosphorus. Overall P removal efficiency in WSP-WHP is 81%, while it is only 16% in WSP-control. difference in phosphorus reduction between those two systems is thought to be caused by the plants and probably their roots producing extra-cellular materials, but these aspects need to be further studied.
Keywords
De-Nitrification; Nitrification; Water Hyacinth Ponds; Waste Stabilization Ponds;
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  • Reference
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