Removal of Dissolved Organic Carbon in Sanitary Gravity Sewer
Removal of Dissolved Organic Carbon in Sanitary Gravity Sewer
复制标题
生活重力下水道中溶解有机碳的去除
DOI：
10.1061/(asce)0733-9372(2001)127:4(295
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发表时间：
2001
影响因子：
2.2
通讯作者：
Ju
中科院分区：
文献类型：
--
作者：
Guanghao Chen;Derrek Ho;Ju
对内径450 mm、坡度0.0075的卫生重力混凝土污水管段1.5 km段溶解有机物的利用进行了研究。沿着下水道连续测量溶解有机碳（DOC）、悬浮固体、溶解氧和流速。约 14% 的 DOC 在 18 分钟的保留时间内被去除。下水道中较慢的流速有利于较高的 DOC 去除效率，因为它提供了较长的保留时间。氧气不是限制因素，因为溶解氧水平至少为 1 毫克/升。使用原污水和悬浮固体或沉降沉积物进行的批量测试得出，污水相和沉积物相的 DOC 比分别为 1.3 毫克和 2.6 毫克 DOC/毫克干重/天。对悬浮固体和沉积物样品的三磷酸腺苷含量分析证实，两者都含有大量的活性生物质。 1.5公里下水道系统预计可稳定DOC 39.13公斤/天；污水相占40%，沉积物相占60%。
Utilization of dissolved organic matter in a 1.5 km section of a sanitary gravity concrete sewer with an inner diameter of 450 mm constructed on a slope of 0.0075 was studied. Continuous measurements of dissolved organic carbon (DOC), suspended solids, dissolved oxygen, and flow rate were performed along the sewer. About 14% of the DOC was removed in an 18-min retention time. A slower flow rate in the sewer would favor higher DOC removal efficiency because it offers a longer retention time. Oxygen was not a limiting factor as the dissolved oxygen level was at least 1 mg/L. Batch tests using raw sewage and either suspended solids or settled sediments yielded specific DOC rates of 1.3 mg and 2.6 mg DOC/mg dry wt/day for the sewage phase and sediment phase, respectively. Adenosine triphosphate content analysis of the suspended solids and sediment samples confirmed that both contained substantial amounts of active biomass. In the 1.5-km sewer system, it is estimated that 39.13 kg of DOC can be stabilized/day; the sewage phase contributes 40% while the sediment phase contributes 60%.