N,N-二甲基甲酰胺(DMF)作为有机溶剂在化工领域得到了广泛的应用.本研究通过对小试升流式厌氧污泥床(UASB)反应器处理高浓度DMF工业废水的实验进行评估.实验中,UASB在有限有机负荷率(OLR)范围1.57～9.59 kg COD/(m3·d)下运行,将水力停留时间(HRT)由48 h缩短至8 h,去除效率优良,达到95％以上.利用经验方程对DMF废水处理过程的CO2排放量和生物能源产生量进行了估算和评估,相比传统的活性污泥(CAS)工艺,UASB工艺具有明显优势,能够回收能源并减少CO2排放,其正净能量潜力为0.061 kW·h/m3,同时还显著减少了6.18 kg/m3的CO2排放量.本研究的结果证明了UASB工艺在处理DMF废水方面的潜力和可行性,并促进了碳中和理念在废水处理中的推广.
Study on the treatment of N,N-dimethylformamide-containing waste water by up-flow anaerobic sludge blanket reactor
N,N-dimethylformamide(DMF)is widely used as an organic solvent in the chemical in-dustry.This study aimed to assess the treatment of high-concentration DMF-containing industrial wastewater using a lab-scale up-flow anaerobic sludge blanket(UASB)reactor.The UASB reactor op-erated within a limited range of organic loading rates(OLR)of 1.57～9.59 kg COD/(m3·d),with the hydraulic retention time(HRT)reduced from 48 hours to 8 hours.The reactor demonstrated excel-lent removal efficiency,exceeding 95％.CO2 emissions and bio-energy production during the treatment of DMF wastewater were estimated and evaluated using empirical equations.Compared to the conven-tional activated sludge(CAS)process,the UASB process exhibited significant advantages in terms of en-ergy recovery and CO2 emission reduction.It achieved a positive net energy potential of 0.061 kW·h/m3 and substantially reduced CO2 emissions by 6.18 kg/m3.The results of this study provide evidence of the potential and feasibility of the UASB process for DMF waste treatment,while also contributing to the promotion of the carbon neutrality concept in wastewater treatment.
Anaerobic digestionN,N-dimethylformamideUASBIndustrial wastewaterBio-energy production
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