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| CAST一体化设备处理农村生活污水工况研究 |
| Study on the operating condition of CAST integrated equipment for the treatment of rural domestic sewage |
| 投稿时间：2018-05-30 |
| DOI：10.13254/j.jare.2018.0142 |
| 中文关键词: CAST一体化设备，农村生活污水，运行参数，氮，磷，水质 |
| 英文关键词: CAST integrated equipment, rural domestic sewage, operation parameters, nitrogen, phosphorus, water quality |
| 基金项目:国家水专项巢湖课题（2013ZX07103-06） |
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| 摘要点击次数: 1802 |
| 全文下载次数: 1963 |
| 中文摘要: |
| 为获取CAST（循环式活性污泥法）一体化设备处理农村生活污水的适宜运行参数，分别在5种工况下研究CAST一体化设备处理农村生活污水的色度、浊度、COD、TN、氨氮、TP和磷酸盐的去除效果。结果表明，该CAST一体化设备在以下运行工况参数：（1）温度25℃、容积负荷0.20 kg·m-3·d-1、溶解氧2.00 mg·L-1、曝气2 h；（2）温度25℃、容积负荷0.40 kg·m-3·d-1、溶解氧4.00 mg·L-1、曝气2 h，出水COD、TN和TP能达《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级B标准。在温度25℃、容积负荷0.60 kg·m-3·d-1、溶解氧4.00 mg·L-1时，延长曝气时间至2.5 h，出水COD和TN可达《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级B标准，同时出水TP也可得到极大改善。5种工况下，浊度和色度均能被很好去除，但氨氮均不能达《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级B标准。根据农村污水处理对COD、TN和TP的排放要求，通过试验取得的运行参数能对小型CAST一体化设备在农村的应用提供指导。 |
| 英文摘要: |
| To study the operating parameters of small CAST integrated equipment, which are suitable for the treatment of rural domestic sewage, the experiments were conducted and the treatment effect of chromaticity, turbidity, COD, TN, ammonia nitrogen, TP, and phosphate were studied under five test conditions, respectively. The following results were obtained:The COD, total nitrogen and total phosphorus in effluent could reach the criteria B of Grade I of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) if the following operating conditions of the CAST integrated equipment were followed:(1) The temperature was 25℃, the volume load was 0.20 kg·m-3·d-1, the dissolved oxygen concentration was 2.00 mg·L-1, and the aeration time was 2 h; (2) The temperature was 25℃, the volume load was 0.40 kg·m-3·d-1, the dissolved oxygen concentration was 4.00 mg·L-1, and the aeration time was 2 h. At a temperature of 25℃, volume load of 0.60 kg·m-3·d-1, dissolved oxygen content of 4.00 mg·L-1, and aeration time of 2.5 h, the COD and TN of the effluent could reach the criteria B of Grade I of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), and the TP of the effluent could be improved at the same time. In all the five experiments, chromaticity and turbidity were removed, but the ammonia nitrogen couldnot reach the criteria B of Grade I of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The operating parameters could provide guidance for the application of small CAST integrated equipment in rural areas. |
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