人工湿地处理甲胺磷废水的试验研究

文章研究了水力停留时间、进水甲胺磷浓度、外加营养物以及温度对人工湿地去除甲胺磷效果的影响。结果表明,水力停留时间的增加能显著提高甲胺磷的去除效果;进水甲胺磷浓度在一定的范围内,人工湿地系统对甲胺磷废水具有良好的去除效果。进水浓度分别为5.3mg/L、9.74mg/L、19.1mg/L和50.75mg/L时,相应的甲胺磷去除率分别为93.5%、89.5%、90.7%和92.2%。外加碳源在一定程度上抑制人工湿地对甲胺磷的去除;在进水中添加葡萄糖浓度为50mg/L时,甲胺磷的去除率下降了6.2%。添加氮源对甲胺磷降解的影响并不明显,温度显著地影响人工湿地对甲胺磷的去除效果。日平均气温在24℃以上时,系统对甲胺磷的去除率稳定在95%以上;当日平均气温低于20℃时,系统对甲胺磷的去除效果明显下降,平均去除率低于90%;当日平均气温低于15℃时,系统对甲胺磷的去除率低于60%。

Treatment of Methamidophos Wastewater with Constructed Wetland

Effects of hydraulic retention time,influent concentration,additive nutrients and temperature on removal of methamidophos by constructed wetland were studied. Results showed that removal efficiency could be increased by a long hydraulic retention time and methamidophos with the tested concentrations were treated well by constructed wetland system. When the influent concentrations were 5.3mg/L,9.74mg/L,19.1mg/L and 50.75mg/L,removal efficiencies were 93.5%,89.5%, 90.7% and 92.2% respectively. Addition of carbon nutrient had an inhibited effect on removal efficiency. When dextrose was added at 50mg/L,methamidophos removal rate decreased by 6.2%,but nitrogen source addition did not have prominent effect on methamidophos degradation. Temperature affected removal efficiency greatly. When daily mean temperature decreased from 24℃ to 15℃,average degradation rate changed from 95% to 60%.