| 基于MABR的短流程工艺处理市政污水性能研究 |
| 作者:柳蒙蒙, 彭梦文, 王殿常, 尹 炜, 朱向东, 刘龙志, 周小国, 陈亚松 |
| 单位: 1. 长江经济带生态环境国家工程研究中心, 武汉 430014; 2. 长江生态环保集团有限公司, 武汉 430010 |
| 关键词: 膜曝气生物膜反应器; 同步硝化反硝化; 市政污水; 氧传质; 短流程脱氮 |
| DOI号: 10.16159/j.cnki.issn1007-8924.2025.06.013 |
| 分类号: X703 ; TQ028 |
| 出版年,卷(期):页码: 2025,45(6):116-125 |
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摘要: |
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本研究搭建了100 m3/d的膜曝气生物膜反应器(MABR)中试装置,通过对实际市政污水进行处理,探究工艺设计合理性、系统运行效果,分析MABR脱氮贡献、氧传质特性及环境因子的相关性。结果表明:MABR在一个月内可以完成微生物挂膜,并且该工艺系统内回流点位设置在MABR单元后端,并保持内外回流比均为100%左右,可以避免对进水氨氮的稀释,进而提高MABR硝化速率(NR),强化MABR单元同步硝化反硝化效果;运行期间,MABR硝化速率达(2.75±1.13) g N/(m2·d),MABR单元脱氮贡献占系统总脱氮量的20.42%±7.97%;氧传质效率(OTE)与氧传质速率(OTR)分别达到33.36%±10.75%和(10.85±2.88) g O2/(m2·d),证明MABR具有较强的氧传质特性。本中试系统实现了高效短流程脱氮,在较短生化停留时间(HRT=10.81 h)条件下,出水指标优于江苏省地标《城镇污水处理厂污染物排放标准》(DB 32/4440-2022)的A类标准(其中TN<10 mg/L)。 |
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In this study, a 100 m3/d MABR pilot plant was built. Through the actual municipal sewage treatment, the rationality of process design and system operation effect were explored, and the MABR nitrogen removal contribution, oxygen mass transfer characteristics and correlation with environmental factors were analyzed. The results showed that: MABR could complete microbial film hanging within one month, and the reflux point in the process system was set at the back end of the MABR unit, and the internal and external reflux ratio was maintained at about 100%, which could avoid the dilution of influent ammonia nitrogen, thereby increasing the nitrification rate (NR) of MABR, and enhancing the simultaneous nitrification and denitrification effect of the MABR unit; During operation, the nitrification rate of MABR reached (2.75±1.13) g N/(m2·d), and the nitrogen removal contribution of MABR unit accounted for 20.42%±7.97% of the total nitrogen removal amount. oxygen transfer efficiency (OTE) and oxygen transfer rate (OTR) reached 33.36%±10.75% and (10.85±2.88) g O2/(m2·d), respectively. It is proved that MABR has strong oxygen mass transfer property. Under the condition of short biochemical residence time (HRT=10.81 h), the effluent index was better than the Class A standard (TN<10 mg/L) of the local standard of Jiangsu province, “Pollutant Discharge Standard for Urban Sewage Treatment Plants” (DB 32/4440-2022). |
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基金项目: |
| 国家重点研发计划资助项目(2023YFC3207601); 中国长江三峡集团有限公司科研项目资助(NBWL202300013) |
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作者简介: |
| 柳蒙蒙(1992-),男,河北衡水人,高级工程师,博士,主要研究方向为污废水处理及资源化利用. |
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参考文献: |
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