香根草和风车草人工湿地对猪场废水氮磷处理效果的研究

摘要/Abstract

摘要： 分别以香根草(Vetiveria zizanioides)和风车草(Cyperus alternifolius)为植被,按1.0m×0.5m×0.8m建立人工湿地,通过四季测试研究其对猪场废水N、P的净化功能及其随季节、进水浓度及水力停留时间变化的规律.结果表明,两湿地对NH₃N和S-PO₄^3-去除率受污水停留时间和污水浓度影响较大.香根草或风车草人工湿地在春季对NH₃-N和S-PO₄^3-有明显的去除效果;在秋季,则对去除废水TN均有效果,在去除TP上,香根草湿地效果明显,风车草湿地效果差.秋春季人工湿地随水力停留时间(t)延长,TP或S-PO₄^3-(Y)的去除遵从指数方程Y_t=Y₀·e^-kt规律.冬季和夏季,进水浓度对湿地去除P影响较大;在相同停留时间内,冬夏季人工湿地随进水浓度变化,进出水S-PO₄^3-遵从直线方程y=a+bx规律.

Abstract: Using plant species Vetiveria zizanioides (VCWS) and Cyperus alternifolius (CCWS) respectively,two constructed wetlands (CWS) with size of 1.0 m?0.5 m?0.8 m were established. The purifying function and its change pattern among different seasons,influent concentration and hydraulic retention time (HRT) of CWSon nitrogen and phosphorus in wastewater from a hoggery was studied throughout four seasons in the year. The results showed that the effects of HRTand wastewater concentration on the removal rate of NH₃-Nand S-PO₄^3- were obvious in both VCWSand CCWS. High removal rates of NH₃-Nand S-PO₄^3- were obtained in CCWSand VCWSin spring. Significant removal of TNin wastewater existed in CCWS and VCWS in autumn,while signi-ficant removal of TP in wastewater existed only in VCWS. The removal of TP or S-PO₄^3- against the HRT in CWS followed exponential function. The rates of Premoval in winter and summer changed with the influent concentrations. Under the same HRT,the change of S-PO₄^3- concentrations in outflow against the influent concentration followed a linear relationship.

中图分类号:

X703

廖新俤, 骆世明. 香根草和风车草人工湿地对猪场废水氮磷处理效果的研究[J]. 应用生态学报, 2002, (6): 719-722.

LIAO Xindi, LUO Shiming . Effects of constructed wetlands on treating with nitrogen and phosphorus in wastewater from hoggery[J]. Chinese Journal of Applied Ecology, 2002, (6): 719-722.

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