ZHAO Bo-wei,NIU Yu-kun,XIE Fei,et al.Pilot-scale Study on Resource Recycling of Excess Sludge Carbonized Pyrolysis Liquid[J].China Water & Wastewater,2021,37(19):1-6.
剩余污泥碳化裂解液的资源化中试研究
- Title:
- Pilot-scale Study on Resource Recycling of Excess Sludge Carbonized Pyrolysis Liquid
- Keywords:
- excess sludge; carbonized pyrolysis liquid; resource recycling; carbon resource for denitrification; biogas
- 摘要:
- 山西省晋中市污水处理厂建立了国内首家较大规模的污泥碳化工程项目，处理量达到300 t/d，取得了良好的处理效果，但其产生的碳化裂解液中COD浓度高达20 000 mg/L左右、氨氮浓度约为1 200 mg/L，并含有大量难降解有机物，碳化裂解液的处理成为制约该工艺发展的主要原因。为此，提出了污泥碳化裂解液制备反硝化碳源和产甲烷两种资源化方案，并构建了处理量为1 m3/d的中试装置。研究结果表明，通过厌氧产甲烷工艺，裂解液中有机物的甲烷产率达到0.33 m3/kgCOD，证明其具有较好的产甲烷潜力；通过厌氧酸化联合氨吹脱工艺，裂解液中的COD酸化率达到50%以上、COD损失率为14.2%、氨氮去除率达到85%以上；裂解液制备的碳源的反硝化效果略低于乙酸钠但优于葡萄糖，是良好的反硝化碳源。以中试结果和市场价格推算，日产生300 m3裂解液的污泥碳化工程，若回收甲烷每年可节约能源成本141.99万元，若回收碳源每年可节省碳源投加费用467.57万元。
- Abstract:
- The first large-scale sludge carbonization project in China has been established in a wastewater treatment plant in Jinzhong, Shanxi Province. The project has a treatment capacity of 300 t/d and a good treatment performance. However, the concentrations of COD and ammonia nitrogen in the carbonized pyrolysis liquid are as high as 20 000 mg/L and 1 200 mg/L, and the liquid also contains a lot of refractory organic matters, leading to its treatment becomes the main reason restricting the development of this process. Therefore, two resource utilization schemes were proposed, namely preparation of denitrifying carbon source and methane production from the carbonized pyrolysis liquid, and a pilot plant with a treatment capacity of 1 m3/d was constructed. The methane production rate of the organic compounds in the pyrolysis liquid reached 0.33 m3/kgCOD through the anaerobic methanogenic process, which proved that this liquid had a good methanogenic potential. The COD acidification rate, COD loss rate and ammonia nitrogen removal efficiency in the carbonized pyrolysis liquid reached more than 50%, 14.2% and 85% by the anaerobic acidification combined with ammonia stripping process. The denitrifying performance of the carbon source prepared by the pyrolysis liquid was slightly worse than that of the sodium acetate but better than that of the glucose, indicating that it was a good denitrifying carbon source. According to the results of the pilot test and the price in the market, the sludge carbonization project that produced 300 m3/d pyrolysis liquid could save energy cost of 1.419 9 million yuan per year if methane was recovered, and carbon source consumption cost of 4.675 7 million yuan per year if carbon source was recovered.
相似文献/References:
[1]徐志嫱,李瑶,周爱朝,等.污泥热水解过程中磷的释放规律与影响因素[J].中国给水排水,2018,34(21):24.
XU Zhi qiang,LI Yao,ZHOU Ai chao,et al.Phosphate Release and Influencing Factors Analysis during Sludge Thermal Hydrolysis[J].China Water & Wastewater,2018,34(19):24.
[2]张彦平,呼瑞琪,李一兵,等.高铁酸盐氧化剩余污泥溶胞减量研究[J].中国给水排水,2020,36(15):59.
ZHANG Yan-ping,HU Rui-qi,LI Yi-bing,et al.Lysis and Reduction of Excess Sludge by Ferrate Oxidation[J].China Water & Wastewater,2020,36(19):59.
[3]胡德秀,张聪,张艳.超声强化污泥释磷及MAP法磷回收优化研究[J].中国给水排水,2020,36(15):65.
HU De-xiu,ZHANG Cong,ZHANG Yan.Phosphorus Release from Sludge Enhanced by Ultrasound and Optimization of Phosphorus Recovery by Magnesium Ammonium Phosphate Method[J].China Water & Wastewater,2020,36(19):65.
[4]晏习鹏,肖小兰,亓金鹏,等.中试厌氧膜生物反应器对剩余污泥的消化效果[J].中国给水排水,2020,36(19):1.
YAN Xi-peng,XIAO Xiao-lan,QI Jin-peng,et al.Digestion of Excess Sludge in a Pilot Anaerobic Membrane Bioreactor[J].China Water & Wastewater,2020,36(19):1.
[5]孙洋洋,张雨辰,徐苏云.不同来源剩余污泥有机质赋存特征及厌氧消化潜能[J].中国给水排水,2021,37(11):17.
SUN Yang-yang,ZHANG Yu-chen,XU Su-yun.Characteristics of Organic Matters in Excess Sewage Sludge from Different Sources and Their Anaerobic Digestion Potential[J].China Water & Wastewater,2021,37(19):17.
[6]朱赵冉,黄显怀,唐玉朝,等.低速搅拌球磨破解剩余污泥高效释放碳源[J].中国给水排水,2021,37(13):1.
ZHU Zhao-ran,HUANG Xian-huai,TANG Yu-chao,et al.High Efficient Release of Carbon Source from Excess Sludge Disintegrated by Low-speed Stirring and Ball-milling[J].China Water & Wastewater,2021,37(19):1.
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DOU Chuan-chuan,LIU Yu-ling,ZHAO Peng-he,et al.Effect of Alkaline Pretreatment on DOM Dissolution Characteristics of Excess Sludge and Parallel Factor Analysis[J].China Water & Wastewater,2021,37(19):14.
[8]罗锋,彭进湖,张忠祥,等.南方污水处理厂污泥厌氧发酵制取碳源及投加策略[J].中国给水排水,2022,38(3):1.
LUO Feng,PENG Jin?hu,ZHANG Zhong-xiang,et al.Preparation of Carbon Source by Anaerobic Fermentation of Sludge in Wastewater Treatment Plant in Southern China and Its Dosing Strategy[J].China Water & Wastewater,2022,38(19):1.
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LUOLu,SHIZhou,XUShi-rong,et al.Effect of Lysozyme Pretreatment on Dewatering Performance of Excess Activated Sludge[J].China Water & Wastewater,2022,38(19):87.
[10]刘子娟,王寅义,徐肖甜,等.剩余污泥碱性发酵产酸及脱水性能研究[J].中国给水排水,2022,38(3):92.
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