A/O-MBR工艺处理典型规模化生猪养殖废水的运行效能分析

高超龙; 陈超; 杨小平; 隋倩雯; 桂双林; 闫冰; 刘志波; 郁达伟; 魏源送

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (10) : 5550-5560.

水污染与控制

A/O-MBR工艺处理典型规模化生猪养殖废水的运行效能分析

高超龙^1,2, 陈超³, 杨小平³, 隋倩雯¹, 桂双林⁴, 闫冰⁴, 刘志波³, 郁达伟¹, 魏源送^1,2

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Performance of the A/O-MBR process treating concentrated swine farm wastewater

GAO Chao-long^1,2, CHEN Chao³, YANG Xiao-ping³, SUI Qian-wen¹, GUI Shuang-lin⁴, YAN Bing⁴, LIU Zhi-bo³, YU da-wei¹, WEI Yuan-song^1,2

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摘要

针对规模化生猪养殖废水化学需氧量(COD)、氨氮(NH₄⁺-N)、悬浮物(SS)浓度高以及可生化性差的问题,本研究采用“预处理-生化处理-深度处理”组合工艺,具体流程为“固液分离→厌氧发酵→缺氧/好氧(A/O)→膜生物反应器(MBR)”,系统分析了该组合工艺在夏季和冬季的进水水量、水质特征及其污染物去除效果,评估了处理过程中能耗和温室气体(Greenhouse gas, GHG)排放状况.结果显示,夏季出水平均COD(423.36mg/L)和总氮(TN, 52.81mg/L)显著低于冬季(711.21, 61.78mg/L),表明低温显著抑制该工艺处理效能;A/O单元为能耗核心,吨水能耗达7.65 (kW·h)/m³,占总能耗的56.48%;温室气体年排放总量为1364.41tCO₂-eq,排放强度为15.53kg CO₂-eq/m³,其中,去除单位质量COD和TN的排放强度分别为1.33kg CO₂-eq/ kg COD_removed和10.89kg CO₂-eq/kg TN_removed.进一步分析表明,能耗贡献了72.98%的碳排放总量,其次是脱氮过程氧化亚氮(N₂O)碳排放量(占比为25.99%).建议通过季节性工艺参数调控优化、多模式运行策略开发及在线监测技术集成,实现处理过程的精准控制,以实现节能降耗与低碳化运行目标.

Abstract

Given high concentrations of chemical oxygen demand (COD), ammonium nitrogen (NH₄⁺-N), suspended solids (SS), and poor biodegradability of concentrated swine farm wastewater, a combined treatment process of "pretreatment-biochemical treatment- advanced treatment" was employed in this study, specifically designed as "solid-liquid separation → anaerobic fermentation → A/O → MBR." By comparing influent characteristics and pollutant removal efficiency between summer and winter, the energy consumption and greenhouse gas (GHG) emission profiles of the system were systematically analyzed. The average effluent COD and TN in the summer were significantly lower than those in the winter (711.21mg/L and 61.78mg/L, respectively), indicating that low temperature significantly inhibit the treatment efficiency. The A/O unit dominated energy usage, with a consumption of 7.65 (kW·h)/m³, accounting for 56.48% of total energy demand. The annual GHG emissions totaled 1364.41t CO₂-eq, with an emission intensity of 15.53kg CO₂-eq/m³. The emission intensities per unit COD and TN removed were 1.33kg CO₂-eq/kg COD_removed and 10.89kg CO₂-eq/kg TN_removed, respectively. Further analysis revealed that external electricity consumption contributed to 72.98% of total GHG emission, followed by nitrous oxide (N₂O) release (25.99%). Through the regulation of seasonal process parameters, the development of multi-mode operation strategies, and the integration of online monitoring technologies, the precise control of the treatment process is optimized to achieve the goals of energy saving, consumption reduction, and low-carbon operation.

导出引用

高超龙, 陈超, 杨小平, 隋倩雯, 桂双林, 闫冰, 刘志波, 郁达伟, 魏源送. A/O-MBR工艺处理典型规模化生猪养殖废水的运行效能分析[J]. 中国环境科学. 2025, 45(10): 5550-5560

GAO Chao-long, CHEN Chao, YANG Xiao-ping, SUI Qian-wen, GUI Shuang-lin, YAN Bing, LIU Zhi-bo, YU da-wei, WEI Yuan-song. Performance of the A/O-MBR process treating concentrated swine farm wastewater[J]. China Environmental Science. 2025, 45(10): 5550-5560

中图分类号： X703.1

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