Aquacultura

Vol.12 No.6 2007 1131-1135

Article ID: 1007-1202(2007)06-1131-05 DOI 10.1007/s11859-007-0116-7

Application of Constructed Wetlands on Wastewater Treatment for Aquaculture Ponds
□ LI Gu1,2,3, WU Zhenbin1†, CHENG Shuiping1, LIANG Wei , HE Feng , FU Guiping , ZHONG Fei
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Introduction

1. Institute of Hydrobiology, Chinese Academy of Sciences/State Key Laboratory of Freshwater Ecology and Biotechnology, Wuhan 430072, Hubei, China; 2. Yangtze River Fishery Institute, Chinese Academy of Fishery Sciences, Jingzhou 434000, Hubei, China; 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China Abstract: A group of constructed wetlands (CWs) were applied to the recirculating aquaculture system. This study assessed the performance of CWs in treating the aquaculture wastewater, examined the water quality condition of aquaculture ponds and the growth and the survival rate of “target” species (Ictalurus punctatus and Megalobrama amblycephala). The results showed that CWs were effective on reducing the concentrations of 5-day biochemical oxygen demand (BOD5, at 70.5%), total suspended solids (TSS, at 81.9%), chlorophyll a (Chl-a, at 91.9%), ammonium (NH4+, at 61.5%) and nitrate nitrogen (NO3--N, at 68.0%). Effect of CWs on phosphate (PO43--P) removal was relatively lower (at 20.0%). The concentrations of BOD5, TSS, Chl-a, NH4+ and TN, TP in the recirculating culture pond were significantly lower than that in the control pond( p 0.05 ). CWs could help to increase total yield, survival rate of the “target” species and significantly decrease feed conversion ratio ( p 0.05 ). Key words: constructed wetlands(CWs); recirculation aquaculture system; Ictalurus punctatus; Megalobrama amlycepnala; wastewater treatment CLC number: X 714

Received date: 2007-05-13 Foundation item: Supported by the National High Technology Research and Development Program of China (863 Program) (2002AA601150), the Knowledge Innovation Program Key Project of Chinese Academy of