机械振动与曝气吹扫MBR工程两年运行效果对比

薛涛; 关欢欢; 陈春生; 俞开昌; 黄霞

doi:10.13205/j.hjgc.202506011

机械振动与曝气吹扫MBR工程两年运行效果对比

doi: 10.13205/j.hjgc.202506011

1. 北京碧水源科技股份有限公司, 北京 102206;
2. 清华大学环境学院, 北京 100084

基金项目:

国家重点研发计划项目课题“多目标城市污水资源化核心工艺与模式”（2022YFC3203103）

详细信息

作者简介:
薛涛（1977—），男，正高级工程师，主要研究方向为水污染控制与资源化。xt_chn@163.com

通讯作者:
薛涛（1977—），男，正高级工程师，主要研究方向为水污染控制与资源化。xt_chn@163.com

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出版历程
- 收稿日期: 2023-09-05
- 录用日期: 2023-12-06
- 修回日期: 2023-11-02

Comparison of 2-year operational performance of mechanical vibration and air sparging in an MBR system

1. Beijing OriginWater Technology Co., Ltd, Beijing 102206, China;
2. School of Environment, Tsinghua University, Beijing 100084, China

摘要

摘要: 已有小试与中试研究证明机械振动是一种可行的、低能耗的MBR膜污染控制手段。北京窦店再生水厂是国内外第1座同时采用机械振动MBR（V-MBR）与曝气吹扫MBR（AS-MBR）工艺的实际城镇污水处理工程，2年的运行数据表明：在较低进水碳氮比［ρ（COD）/ρ（TN）≈5］时，V-MBR工艺出水TN浓度比AS-MBR降低4 mg/L以上，但V-MBR工艺出水COD、NH₄⁺-N、TP浓度与AS-MBR工艺相近。V-MBR膜池内源脱氮与AS-MBR膜池内源释放氮的差异贡献了约70%的V-MBR脱氮能力提升量。V-MBR污泥硝化、反硝化、释磷与吸磷速率分别比AS-MBR高出18%、19%、19%与14%。水厂主要的硝化菌属为Nitrosomonas与Nitrospira，反硝化菌属为Denitratisoma、Terrimonas与Thauera等，聚磷菌属为Dechloromonas与Ca. Accumulibacter，V-MBR中硝化菌、反硝化菌与聚磷菌属的相对丰度均高于AS-MBR。V-MBR工艺运行电耗为0.35 kW·h/m³，比AS-MBR节能0.13 kW·h/m³，其中膜振动电机相比吹扫风机的节能贡献占比约为85%。V-MBR的化学除磷药剂成本比AS-MBR减少33.3%。V-MBR工艺强化脱氮除磷与节能优势显著，未来可进一步优化振动设备机械结构。
- MBR /
- 机械振动 /
- 曝气吹扫 /
- 脱氮除磷 /
- 膜污染
Abstract: Mechanical vibration has been proven to be an effective and energy-saving method for controling MBR membrane fouling in many lab-scale and pilot-scale studies. The Beijing Doudian Wastewater Treatment Plant （WWTP） is the first project treating real municipal wastewater with vibrating MBR （V-MBR） and air sparging MBR （AS-MBR） processes in parallel around the world. During two years of operation， data showed that when the COD/TN ratio of the influent was as low as 5， the TN concentration in the effluent of the V-MBR process was at least 4 mg/L lower than that of the AS-MBR process. The COD， NH₄⁺-N， and TP concentrations in the effluents of two processes were comparable. The difference in endogenous nitrogen removal in the V-MBR membrane tank and endogenous nitrogen release in the AS-MBR membrane tank contributed to approximately 70% of the enhanced nitrogen removal capacity in the V-MBR process. The nitrification， denitrification， phosphorus release， and phosphorus uptake rates of the V-MBR sludge were 18%， 19%， 19%， and 14% higher than those of the AS-MBR sludge， respectively. Nitrosomonas and Nitrospira were the main nitrfiers. Denitratisoma， Terrimonas， and Thauera were the main denitrifiers. Dechloromonas and Ca. Accumulibacter were the main phosphorus-accumulating organisms （PAO）. The comparative abundances of nitrifiers， denitrifiers， and PAOs in the V-MBR sludge were all higher than those in the AS-MBR sludge. The energy consumption of the V-MBR process was 0.35 kW·h/m³， which was 0.13 kW·h/m³ lower than that of the AS-MBR. The energy consumption difference between the vibrating motor of the V-MBR and the air-sparging blower of the AS-MBR accounted for 85% of the total energy saving. The chemical cost for phosphorus removal in the V-MBR process was 33.3% lower than that in the AS-MBR process. The V-MBR process demonstrated evident advantages in enhancing nitrogen and phosphorus removal while saving energy. The mechanical structure of the vibrating devices could be further optimized.
- MBR /
- mechanical vibration /
- air sparging /
- nitrogen and phosphorus removal /
- membrane fouling

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