本文選題：再生水 + 河岸滲濾系統(tǒng)�。� 參考：《農(nóng)業(yè)機械學報》2017年05期

【摘要】：以北京市清河再生水廠出水為研究對象,構建100 cm土柱模擬河岸滲濾系統(tǒng),研究長周期供水條件下,持續(xù)淹水與交替淹水落干2種補水方式下滲濾系統(tǒng)對再生水中有機物和總氮(TN)的凈化效果及系統(tǒng)穩(wěn)定性。通過3年的試驗研究發(fā)現(xiàn),持續(xù)淹水與交替淹水落干補水方式下,滲濾系統(tǒng)對再生水中有機物的平均去除率分別為40.5%和50.8%,交替淹水落干補水方式對有機物去除效果略優(yōu)于持續(xù)淹水的情況。有機物的去除主要發(fā)生在溶解氧濃度較高、微生物數(shù)量最多的上部0~40 cm土層范圍內(nèi)。2種補水條件下滲濾系統(tǒng)對有機物的去除率在年際間變化不大,系統(tǒng)凈化性能穩(wěn)定。2種補水方式下滲濾系統(tǒng)對TN的平均去除率分別為31.2%和80.7%,交替淹水落干補水方式對TN的去除效果明顯優(yōu)于持續(xù)淹水的情況。2種補水條件下滲濾系統(tǒng)對TN的去除率逐年增大,系統(tǒng)凈化性能隨時間呈增強趨勢。試驗期間,水溫在15~31℃范圍內(nèi)變化時,2種滲濾系統(tǒng)對TN的去除率隨溫度的增大呈指數(shù)或對數(shù)趨勢增加,當溫度在30℃以上時,交替淹水落干補水方式下系統(tǒng)對TN的去除率最高可達90%以上。再生水經(jīng)過河岸滲濾系統(tǒng)后,總氮和有機物能夠得到有效的去除,再生水回補河湖對地下水污染的風險大幅降低。
[Abstract]:Taking the effluent of Qinghe Recycling Water Plant in Beijing as the research object, a 100 cm soil column simulated riverbank leachate system was constructed to study the condition of long period water supply.The purification effect and system stability of organic matter and TNN in regenerated water by continuous flooding and alternate flooding.After 3 years of experimental study, it is found that under the way of continuous flooding and alternate flooding,The average removal rates of organic matter in regenerated water by leachate system were 40.5% and 50.8% respectively.The removal rate of organic matter mainly occurred in the upper 0 ~ 40 cm soil layer, where the dissolved oxygen concentration was relatively high, and the removal rate of organic matter by the leachate system had little change in different years.The average removal rate of TN was 31.2% and 80.7, respectively. The removal efficiency of TN by alternate flooding method was better than that under continuous flooding condition (.2%).The removal rate of TN is increasing year by year.The purification performance of the system increases with time.During the test period, the TN removal efficiency of the two leachate systems increased exponentially or logarithmically with the increase of temperature when the water temperature varied from 15 鈩，

本文編號：1765783