摘要
采用生态沟渠中试设施,探索了沟渠植物搭配方式、水力停留时间、生物量对农村生活污水脱氮除磷效果的影响。研究结果表明HRT存在优化区间,优化区间内TN和TP去除率随HRT延长而升高较快,建议控制HRT为5 d,使脱氮除磷效果总体优化,出水氮磷可满足地表水Ⅳ、Ⅴ类功能水域、非重点控制流域或非水源保护区建制镇的水污染控制要求。研究还显示生物量变化对脱氮效果的影响比对除磷效果的影响大,在生物量相差不大的情况下,挺水+沉水种植模式的脱氮除磷效果优于挺水种植模式。
Effects of plant combination, HRT and biomass on denitrification and phosphorus removal of rural sewage by ecological ditch pilot plant were studied. Results showed that the removal rates of TN and TP increased with the time extension in the existed optimal interval of HRT. It was suggested that HRT should be set as 5 d to achieve the overall optimization effect in which the effluent concentrations of TN and TP could meet the water pollution control standards of Grade-IV, Grade-V water area, non-key watershed, and the area out of water protection zone. It was also indicated that the effect of biomass increase on denitrification was more significant than on phosphorus removal, and that with little biomass difference, the efficiency of denitrification and phosphorus removal by the planting mode of emergent aquatic plants with submerged plants was better than by that of emergent aquatic plants.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第8期196-199,共4页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项(2009ZX07529-007)
