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題名 | 農村聚落污水懸浮質削減成效之探討=Suspended Solid Removal Performance in Rural Wastewater |
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作者 | 陳鴻烈; 許振峯; 蔡大偉; Chen, Paris Honglay; Hsu, Cheng-feng; Tsai, David D.-w.; |
期刊 | 水土保持學報 |
出版日期 | 20101200 |
卷期 | 42:4 2010.12[民99.12] |
頁次 | 頁465-477 |
分類號 | 445.46 |
語文 | chi |
關鍵詞 | 再懸浮作用; 懸浮固體物; 農村污水; 礫間接觸; 人工濕地; Resuspension; Suspended solid; Rural sewage; Gravel contact bed; Constructed wetland; |
中文摘要 | 農村規劃是水土保持局最重要的任務之一,而農村聚落所產生之污水採用自然工法或生態 工法,可降低農村污水對自然水體水質的影響,故本研究以礫間接觸與表面流人工濕地,來淨 化農村聚落污水,並探討懸浮固體物之削減成效。運轉初期因「礫石生物膜及水生植物生長尚 未成熟」,故放流水懸浮固體物變化大(10~22 mg/L),但經「礫石生物膜及水生植物生長穩定」 及「修改FWS 單元出流口湍流情形」後,已使全場放流水質懸浮固體物小於10mg/L 以下。 經探討表面流人工濕地處理單元,若進流懸浮固體物低於10 mg/L,可能會產生出流高於 進流之情形,其主要受系統內再懸浮作用影響;而礫間接觸處理單元較不受再懸浮作用之影 響,故不會產生出流高於進流之情形。雖然再懸浮作用會影響出流水之懸浮固體物,但本研究 也經由水理計算了解,藉由良好的水力設計條件可降低其影響;而背景濃度對出流水懸浮固體 物濃度影響,也說明自然處理工法對懸浮固體物削減有其限制,當進流懸浮固體物太低時(< 10 mg/L),不容易有穩定之去除成效,為此工法之特性。 |
英文摘要 | In the foreseeable future, rural planning is one of the important missions of Soil and Water Conservation Bureau in Taiwan. The rural (agricultural return and domestic) wastewater management is an essential issue for the successful planning. The ecological engineering (soil, septic tank,ponding, wetland, etc.) has been employed for several decades to treat the rural wastewater in the developed countries. This research was to study the ecological engineering measures of gravel contact bed and free water surface (FWS) wetland to treat wastewater to eliminate the SS pollution in rural water environment. Furthermore we look into “resuspension” which is crucial disturbance of sedimentation. In the study period, our results showed that the SS varied significantly because of the diverse growth of biofilm with aquatic plants. The short-circuiting in FWS had affected the performance. The outlet design is crucial and the modification of outlet in FWS can keep the effluent below 10 mg/L. According to the monitoring data, we found the gravel contact bed could keep a remarkable removal efficiency, but in wetland system, the outlet SS could be higher than inlet’s by “resuspension” while the influent SS was very low. This study further investigated the important mechanism of “resuspension” and demonstrated an excellent weir outlet design to reduce SS overflow. The modified hydraulic conditions and the better outlet design can trim down the “resuspension” impact effectively. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。