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IC-AnMBR处理村镇厨余渗滤液废水稳定运行调控机制 被引量:2

Regulation mechanism for steady operation of IC-AnMBR treating high strengh organic rural leachate from food waste
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摘要 村镇厨余垃圾渗滤液等高浓度有机废水的高效处理是提升村镇环境卫生水平的一个重要方面。为满足村镇厨余垃圾渗滤液低能耗有机物排放达标的处理需求,构建了内循环厌氧膜生物反应器(internal circulation anaerobic membrane bioreactor,IC-AnMBR),并用来处理厨余渗滤率废水,重点分析了反应器的COD去除性能和调控机制;根据pH、VFAs/碱度、容积产气率、膜通量和出水有机污染物组分等指标,考察了COD在水解酸化、产甲烷和膜截留过程中的转移转化特征。结果表明:通过耦合膜擦洗曝气和沼气曝气循环,将VFAs/碱度和容积产气率分别从1.5和0.1优化到0.02和1.0;优化了COD稳定达标性能和去除负荷,将COD去除率和负荷从59%和0.3 kg·(m^3·d)^−1分别提高到了97.7%和1.8 kg·(m^3·d)^−1;采用沼气循环曝气擦洗陶瓷膜,控制了滤饼层积累,并将膜通量从0.6 L·(m^2·h)-1提高到2.1 L·(m^2·h)^−1。IC-AnMBR短流程工艺能够实现村镇厨余垃圾渗滤液的稳定处理。 Efficient handling high strength organic wastewater such as food waste leachate is an important aspect for improving rural environmental sanitation level.An internal circulation anaerobic membrane bioreactor(IC-AnMBR)was constructed to treat the wastewater from rural food waste leachate and meet its organic discharge requirements with low energy consumption.The COD removal performance and regulation mechanism of the reactor were mainly analyzed.According to the indexes of pH,VFAs/alkalinity,volumetric gas production rate,membrane flux and effluent organic pollutants,the migration and transformation characteristics of COD during hydrolysis and acidification,methane production and membrane separation were also investigated.The results show that by coupling membrane scouring aeration and biogas aeration cycle together,VFAs/alkalinity and volumetric gas production rates were optimized from 1.5 and 0.1 to 0.02 and 1.0,respectively.The performance of stably meeting the discharging standard for effluent COD and COD removal loading were also optimized,the COD removal rate and loading increased from 59%and 0.3 kg·(m^3·d)^−1 to 97.7%and 1.8 kg·(m^3·d)^−1,respectively,achieving the short-cut compliance of IC-AnMBR for the food waste leachate.Adopting biogas circulation to scour the ceramic membrane mitigated the accumulation of the filter cake layer and increased the membrane flux from 0.6 L·(m^2·h)^−1 to 2.1 L·(m^2·h)^−1.So IC-AnMBR short process can achieve the stable treatment of rural food waste leachate.
作者 王拓 郁达伟 方一 陈梅雪 魏源送 WANG Tuo;YU Dawei;FANG Yi;CHEN Meixue;WEI Yuansong(Laboratory of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;University of California-Davis,Davis 95616,The United States)
出处 《环境工程学报》 CAS CSCD 北大核心 2020年第9期2353-2361,共9页 Chinese Journal of Environmental Engineering
基金 国家重点研发计划(2018YFD1100600)。
关键词 厨余垃圾渗滤液 内循环厌氧膜生物反应器(IC-AnMBR) COD去除率 膜通量 food waste leachate internal circulation anaerobic membrane bioreactor(IC-AnMBR) COD removal rate membrane flux
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