复合装置处理农田排水最佳水力停留时间的确定
he Selection of the Best HRT in Compound Constructed Wetland on the Agricultural Wastewater Treatment
研究了茭草、芦苇两种植物，砾石层、粗砂层、细砂层为基质的生物滤池和木炭吸附池构成的复合人工湿地装置净化溶岩地区农田排水中氨氮、总氮和总磷的去除效果。并采取不同的水力停留时间进行采样监测分析。结果表明：实验初期，植物对、磷的需求较大，水力停留时间在4H达到最大值。8H后，体统趋于稳定。随着水力停留时间的延长，生物滤池和木炭吸附池对TP的处理效果也逐渐增加，并呈现上升趋势，当水力停留时间为24h时达到最大值91.67%。装置对氨氮的去除效果随着水力停留时间的逐渐增加而呈现出明显的上升趋势，当水力停留时间为8h时达到最高峰94.85%。装置对TN的处理效果并没有随着水力停留时间的增加而呈现出明显的波动，一直保持在50%左右。这主要是因为氮在湿地中主要是通过硝化和反硝化作用而被去除的，当水力停留时间较小时主要是发生硝化作用，而当水力时间较长产生厌氧时则是主要为反硝化作用。根据不同水力停留时间下各种污染物质的去除效果分析，选择该装置的最佳水力停留时间为24h。
In order to investigate the compound constructed wetland role on the agricultural waster water purification, we built the biological filter with macrophyte of Zizania caduuciflora and bulrush, gravel and sand as their substrates. Next to it, there is a charcoal adsorption pool. We chose different HRT to analyze the purified efficiency. In the beginning, the total nitrogen and total phosphorus (TN/TP) reached the max, because of the higher requirement. Eight hours later, the system reached the stabilization. As the HRT prolonged, the purified efficiency of total phosphorus (TP) increased gradually. When the HRT reached 24 hours, the efficiency went to the top point (91.47%). Besides, the purified efficiency of ammonia nitrogen also increased along with the HRT and reached the top at 8 hours. However, the purified efficiency of total nitrogen (TN) obviously fluctuated, keeping about 50%. This was mainly because the nitrification and denitrification were confined by the HRT. To summarize, we selected 24 hours as the best HRT.
朱华丽、韩丽、李金城、朱克
农业科学技术发展环境科学基础理论废物处理、废物综合利用
生物滤池，复合人工湿地，水力停留时间，脱氮除磷
biological filter compound constructed wetland HRT denitrogenation and dephosphorize
朱华丽,韩丽,李金城,朱克.复合装置处理农田排水最佳水力停留时间的确定[EB/OL].(2007-08-28)[2025-08-10].http://www.paper.edu.cn/releasepaper/content/200708-406.点此复制
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