| Orbal氧化沟工艺达标排放难点诊断及脱氮潜力分析 |
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| 引用本文： | 周乙新,支丽玲,郑凯凯,王燕,支尧,王小飞,李激.Orbal氧化沟工艺达标排放难点诊断及脱氮潜力分析[J].环境工程,2022,40(11):177-181. |
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| 作者姓名： | 周乙新 支丽玲 郑凯凯 王燕 支尧 王小飞 李激 |
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| 作者单位： | 1. 无锡市市政公用产业集团有限公司, 江苏 无锡 214001; |
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| 摘 要： | 江苏省于2018年6月颁布了DB 32/1072—2018《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》，随后太湖流域城镇污水处理厂开展了新一轮的提标改造。以太湖流域某市政污水处理厂为研究对象，采用全流程分析方法作为评估诊断的手段，探讨奥贝尔（Orbal）氧化沟工艺在实际运行过程中存在的主要问题。结果表明:该厂活性污泥的反硝化潜力和速率分别为8.0，2.24 mg NO3--N/（g VSS·h），通过化学需氧量（COD）及总氮（TN）的全流程分析可知，碳源相对缺乏、内回流比低、氧化沟底部淤积等因素限制了脱氮效率的进一步提高，优化运行后尚有一定的脱氮潜力。这为该厂的实际运行管理及后续的提标改造方案设计提供依据，也为类似具有提标改造需求的城镇污水处理厂提供借鉴。
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| 关 键 词： | Orbal氧化沟 全流程分析 反硝化速率/潜力 流速 |
| 收稿时间： | 2021-02-18 |
DIAGNOSIS AND DENITRIFICATION POTENTIAL ANALYSIS OF AN ORBAL OXIDATION DITCH PROCESS |
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| Affiliation: | 1. Wuxi Public Utilities Industrial Group Co., Ltd, Wuxi 214001, China;2. Wuxi Water Group Co., Ltd, Wuxi 214001, China;3. School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China;4. Wuxi Puhui Environmental Technology Co., Ltd, Wuxi 214028, China;5. Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, China;6. Collaborative Innovation Center of Water Treatment Technology & Material of Jiangsu Colleges, Suzhou 215009, China |
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| Abstract: | Jiangsu promulgated a new regional standard, "Emission Limits for Major Water Pollutants from Urban Sewage Treatment Plants and Key Industrial Industries in the Taihu Basin" (DB32/1072-2018) in June 2018. Urban sewage treatment plants in the Taihu Basin are facing a new round of upgrading and reconstruction. Regarding a municipal sewage treatment plant in the Taihu Basin as the research object, the whole process analysis was applied to evaluate the main problems in the actual operation of the Orbal oxidation ditch. The results showed that the rate of denitrification potential and rate of activated sludge were 8.0 and 2.24 mg NO3--N/(g VSS·h) respectively. Regarding the analysis of the whole process of chemical oxygen demand (COD) and total nitrogen (TN), it revealed that the lack of carbon source, low internal reflux ratio, and siltation limited the further improvement of nitrogen removal efficiency, so there was still a certain potential for nitrogen removal after the optimized operation. This paper provided a basis for the actual operation of the plant and the design of the subsequent upgrade, and also offered a reference for the similar urban sewage treatment plants that had the need for upgrade and renovation. |
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