摘要
传统人工快渗(CRI)系统对污水中的氮、磷污染物去除性能较差,难以达标排放,限制了其推广。为了提高CRI系统的净水性能,采用实验室模拟的方法,构建了活性污泥淹没式人工快渗(S-CRI)系统,探究其对污水中有机物、氮、磷的去除效果。结果表明:稳定运行后,S-CRI系统可实现90%以上的COD去除,出水效果更优;S-CRI系统能去除更多的NH_(4)^(+)-N和TN,去除率均值分别超过95%、85%,相比传统CRI系统的脱氮性能得到了明显提升;经S-CRI系统处理后,TP出水浓度较低,去除率同样高于90%;出水有机物、氮、磷浓度均符合GB 18918-2002《城镇污水处理厂污染物排放标准》规定的一级A标排放要求。S-CRI系统应用于污水高效除碳、脱氮、除磷可行,对改善CRI系统净水性能具有现实意义。
The conventional constructed rapid infiltration(CRI)system shows poor performance in the elimination of nitrogen and phosphorus pollutants in sewage,which makes it problematic to comply with the discharge criteria and restricts its promotion.To improve the water purification performance of CRI system,the activated sludge submerged constructed rapid infiltration(S-CRI)system is constructed by laboratory simulation to explore its removal effect on organic matter,nitrogen and phosphorus in sewage.The results show that:(1)Upon a stable running,the S-CRI system can accomplish an over 90%COD abatement with a superior discharge efficacy;(2)The S-CRI system can eliminate more NH_(4)^(+)-N and TN,with the mean removing efficiencies exceeding 95%and 85%respectively,which significantly increases the nitrogen removing capability over the conventional CRI method;(3)Upon processing by the S-CRI process,the TP output is at a lower level and the removing efficiencies is also above 90%;(4)Organic substance,nitrogen and phosphorus levels in the discharge effluent all qualified for Class A emission standard of the Emission Criteria for Municipal Sewage Disposal Plants(GB 18918-2002).The S-CRI system is feasible for efficient removal of carbon,nitrogen and phosphorus from sewage and of practical significance in improving the water purification performance of CRI system.
作者
张利
ZHANG Li(Harqin Left Wing Mongol Autonomous County Water Resources Bureau,Chaoyang,Liaoning Province,Kazuo 122300,China)
出处
《西北水电》
2022年第6期49-53,共5页
Northwest Hydropower
关键词
活性污泥
人工快渗
淹没
污水
脱氮除磷
activated sludge
CRI
submerged
sewage
removal of nitrogen and phosphorus
