- 期刊
二重疏洪道礫間接觸牡蠣殼模場水質淨化之影響
The Effect of Water Purification by Oyster Shell Contacted Beds on Erchong Floodway
摘要
本研究以廢棄的牡蠣殼作爲礫間接觸基質材料，於台北縣凡重疏洪道內處理民生污水，共設置四個槽體，分別爲水頭控制曝氣牡蠣殼槽、水頭控制礫石槽、水頭控制牡蠣殼槽、管路配水牡蠣殼槽。本研究可提供應用臺灣廢棄牡蠣殼作爲礫間接觸處理材料之可行性及其水質淨化之效果。 各槽體之水力停留時間爲0.16-0.34天，槽體操作實驗結果顯示，水頭控制槽體之水力停留係數比值爲0.7~0.8，槽體具有較高淨化效果。管路配水槽體之水力停留係數比值大於1.36時，槽體具有較高淨化效果。故可利用調整人流流量與控制水位達到槽體均勻流流況之最佳水力停留時間。 水質淨化結果顯示，水頭控制牡蠣殼槽之平均單位面積BOD5、懸浮固體、氨態氮、硝酸態氮、氨態氮＋硝酸態氮、總磷、正磷之去除量分別可以達到13.80、51.75、7.20、0.96、4.53、0.53、0.33 g/day.平方公尺。20℃ BOD5一階分解係數爲2.40 day^(-1)。證明利用牡蠣殼礫間接觸對民生污水有淨化之效益。管路配水牡蠣殼槽對於污水淨化具有較高負荷量。於槽禮內部對水體再曝氣可增加並穩定槽體淨化之功效。
並列摘要
The purpose of this study is to utilize wasted oyster shells as the contacted bed media to purify domestic wastewater on Erchong Floodway, Taipei County. There are four systems, head control and aerated of overland flow with oyster shells system, head control of overland flow with gravels system, head control of overland flow with oyster shells system, gated distribution pipe of overland flow with oyster shells system, respectively. This study can provide the availability of using wasted oyster shells and water purification efficiency. The hydraulic retention time of these systems are 0.16 to 0.34 day. Through operation processes, the head control of overland flow systems performed efficiency purification until the hydraulic retention time ratio between 0.7-0.8. The gated distribution of overland flow systems performed efficiency purification until the hydraulic retention time ratio higher than 1.36. The treatment systems should be managed the influent and water level to construct uniform flow under the optimal hydraulic retention time. In the results of the head control of overland flow with oyster shells systems, the average of mass removal of BOD5, SS, NH4(superscript +)-N, NO3(superscript -)-N, NH4(superscript +)-N NO3(superscript -)-N, TP, PO4(superscript 3-)-P were 13.80, 51.75, 7.20, 0.96, 4.53, 0.53, 0.33 g/day.m^2. The BOD5 tint-order reaction reducing rate constant in 2OC was 2.40 day^(-1). Consequently, using oyster shells showed the potential for wastewater purification by contacted bed. The gated distribution pipe of overland flow with oyster shells systems performed efficiently under much more wastewater hydraulic loading rate. Re-aerated treatment was able to increase and stabilize the pollution purification.