Long term diurnal variations in contaminant removal in high rate ponds treating urban wastewater
Long term diurnal variations in contaminant removal in high rate ponds treating urban wastewater
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DOI：
10.1016/j.biortech.2005.07.019
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发表时间：
2006-09-01
影响因子：
11.4
通讯作者：
Oswald, W. J.
中科院分区：
文献类型：
--
作者：
Garcia, J.;Green, B. F.;Oswald, W. J.
在这项调查中，评估了处理城市废水的高效率池塘（HRP）污染物去除的日变化。两个实验 HRP（表面积 1.54 m(2)，深度 0.3 m）。每个装置都串联有一个澄清器（表面积 0.025 m(2)），在一年的时间内以不同的水力停留时间（3-10 天）但在相同的环境条件下并行运行。所采用的操作策略仅在两种 HRP 之间的营养物去除方面产生显着的总体差异。出水总悬浮固体和化学需氧量在中午略高于黎明，而总氮和总磷的浓度在黎明时略高。所有这些差异都与DO和pH的日变化有关。这项工作的主要结论是，HRP 中污染物浓度的日变化不会严重影响其处理废水的可靠性。 (c) 2005 Elsevier Ltd. 保留所有权利。
In this investigation, diurnal variations in contaminant removal in high rate ponds (HRP) treating urban wastewater were evaluated. Two experimental HRPs (surface area 1.54 m(2) and depth 0.3 m). each with a clarifier in series (surface area 0.025 m(2)), were operated in parallel with different hydraulic retention times (3-10 days) but with the same environmental conditions over a period of one year. The operating strategies adopted only yielded a significant overall difference in removal between the two HRPs for nutrients. Effluent total suspended solids and chemical oxygen demand were slightly higher at midday than at dawn, while for total nitrogen and total phosphorous the concentrations were slightly higher at dawn. All these differences were related to the diurnal changes of DO and pH. The main conclusion of this work is that the diurnal variations of the contaminant concentrations in HRPs do not seriously affect their reliability in treating wastewater. (c) 2005 Elsevier Ltd. All rights reserved.