Study on the treatment of N,N-dimethylformamide-containing waste water by up-flow anaerobic sludge blanket reactor
张新政 1邓梓萱 1张涛 2胡勇 3陈荣 4李玉友 5李大鹏 1潘杨 1孔哲1
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作者信息
1. 苏州科技大学 环境科学与工程学院,江苏 苏州 215009
2. 同济大学 环境科学与工程学院,上海 200092
3. 南京工业大学环境科学与工程学院,江苏南京 211816
4. 西安建筑科技大学环境与市政工程学院,陕西西安 710055
5. 日本东北大学工学研究科,宫城仙台980-8579
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摘要
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.
Abstract
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.
关键词
厌氧消化/N,N-二甲基甲酰胺/UASB/工业废水/生物能源生产
Key words
Anaerobic digestion/N,N-dimethylformamide/UASB/Industrial wastewater/Bio-energy production
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