期刊名称：Advance Journal of Food Science and Technology
印刷版ISSN：2042-4868
电子版ISSN：2042-4876
出版年度：2012
卷号：4
期号：5
页码：322-326
出版社：MAXWELL Science Publication
摘要：In order to guarantee a good water quality for freshwater aquiculture in fishpond, compounded ecological was constructed around the fishpond and an experimental study was made that it improves fishpond water quality. A compounded ecological ditch based on the simple transformation of general ditch, has a regular cross-section of isosceles trapezoid, with a lining of permeable brick where ceramsite stroma etc were filled in the grids of the permeable bricks and some hydrophytes were grown in the ditch, including spatterdock, Myriophyllum verticillatum , Vallisneria natans (Lour.) Hara etc. According to the study, after aquiculture wastewater treated by the compounded ecological ditch, the water quality will be improved obviously; the important sign is an increase for DO and apparent decrease for TN, TP, NO3--N, NH4+-N and CODMn. The removal rate ( Rm ) of the main substances is significantly relative to their initial Concentration ( C0 ) and the distance of them carried by flowing water ( Df ). When compounded ecological ditch is used to purify fishpond water, besides slow velocity of the flow (6-9 m/h), the ditch must have a certain length which is suggested to be more than 100 m. On the other hand, a good effect will be procured in fishpond water purification only if an initial concentration exceeds 2.0 mg /L for TN, 0.6 mg/L for NO3--N and 8.0 mg/L for CODMn.
关键词：Aquiculture water ; compounded ecological ditch ; freshwater pond ; water environment ; water quality ;
