HUANGQing,YANGPing,YANGZhong-qi,et al.Analysis on the Engineering Effect and Carbon Emission of MBBR and MBR Processes for Treating Sewage[J].China Water & Wastewater,2023,39(16):99-104.
MBBR和MBR工艺的污水处理效果与碳排放分析
- Title:
- Analysis on the Engineering Effect and Carbon Emission of MBBR and MBR Processes for Treating Sewage
- Keywords:
- MBBR; MBR; membrane fouling; energy consumption; carbon emission
- 摘要:
- 北方某污水处理厂设计处理规模为30×104 m3/d，出水要求达到地表水准Ⅳ类标准，分别采用泥膜复合MBBR（S-MBBR）和MBR工艺进行提标改造和新建。从工艺流程、运行效果、药耗能耗、维护控制以及低碳运行等方面分析了两种工艺的实际应用情况。结果表明，两种工艺处理能力相当，均可以稳定达到设计出水标准，S-MBBR抗水量冲击优势更加显著，平均进水负荷率为119%；两种工艺电/药费用分别为0.469、0.626元/m3，MBR运行费用更高，主要体现在膜池的运行维护方面；两种工艺的低碳运行评价等级分别为二级和三级，电耗为主要碳排放贡献源，占比约为55%；S-MBBR需要可靠的设计和设备支撑，对工艺厂家要求更高；MBR工艺运行费用更高，但也较S-MBBR省地。纯膜MBBR有望在占地上达到与MBR相当水平，且可进一步降低运行费用和碳排放量，但技术难度更高
- Abstract:
- The designed treatment capacity of a wastewater treatment plant (WWTP) in north China is 30×104 m3/d, the effluent reaches level quasi-Ⅳ criteria of Environmental Quality Standards for Surface Water (GB 3838-2002). The core processes are upgraded and constructed by sludge-biofilm composite MBBR (S-MBBR) and MBR process. The actual application of the two processes is analyzed from the aspects of process flow, operation effect, chemical agent and energy consumption, maintenance control and low?carbon operation. The results show that the treatment capacities of the two processes are equivalent, both can stably reach the designed effluent standard. S-MBBR has more significant advantages in influent load impact resistance, and the average influent load rate is 119%. The chemical agent and electricity costs of the two processes are 0.469 yuan/m3 and 0.626 yuan/m3, respectively, and the MBR operation cost is higher mainly due to the operation and maintenance of the membrane tank. The low carbon operation evaluation grades of the two processes are level Ⅱ and level Ⅲ respectively. Electricity consumption is the main carbon emission contributor, accounting for about 55%. S-MBBR needs reliable design and equipment support with higher requirements for process manufacturers, while MBR process has higher operation cost with less footprint. Pure MBBR is expected to reach the same level of footprint as MBR, and further reduce operating cost and carbon emission, but it is more technically difficult.
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