SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 44 ›› Issue (4): 182-191.DOI: 10.1016/j.cjche.2021.05.039

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Component analysis and risk assessment of biogas slurry from biogas plants

Lanting Ke1, Xiaobin Liu1, Bingqing Du1, Yuanpeng Wang1, Yanmei Zheng1, Qingbiao Li1,2   

  1. 1 Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    2 College of Food and Biology Engineering, Jimei University, Xiamen 361021, China
  • 收稿日期:2020-11-25 修回日期:2021-04-09 出版日期:2022-04-28 发布日期:2022-06-18
  • 通讯作者: Yanmei Zheng,E-mail:zym@xmu.edu.cn;Qingbiao Li,E-mail:kelqb@xmu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22038012, 42077030), the Science and Technology Program of Fujian Province, China (2020NZ012015, 2020Y4002) and the Fundamental Research Funds for the Central Universities of China (20720190001).

Component analysis and risk assessment of biogas slurry from biogas plants

Lanting Ke1, Xiaobin Liu1, Bingqing Du1, Yuanpeng Wang1, Yanmei Zheng1, Qingbiao Li1,2   

  1. 1 Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    2 College of Food and Biology Engineering, Jimei University, Xiamen 361021, China
  • Received:2020-11-25 Revised:2021-04-09 Online:2022-04-28 Published:2022-06-18
  • Contact: Yanmei Zheng,E-mail:zym@xmu.edu.cn;Qingbiao Li,E-mail:kelqb@xmu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22038012, 42077030), the Science and Technology Program of Fujian Province, China (2020NZ012015, 2020Y4002) and the Fundamental Research Funds for the Central Universities of China (20720190001).

摘要: Massive amounts of biogas slurry are produced due to the development of biogas plants. The pollution features and the risk of biogas slurry were fully evaluated in this work. Thirty-one biogas slurry samples were collected from sixteen different cities and five different raw materials biogas plants (e.g. cattle manure, swine manure, straw-manure mixture, kitchen waste and chicken manure). The chemical oxygen demand (COD), ammonia nitrogen (NH4+ - N), anions (e.g. Cl-,SO42-, NO3- and PO4-3), antibiotics (e.g. sulphonamides, quinolones, β2-receptor agonists, macrolides, tetracyclines and crystal violet) and heavy metals (e.g. Cu, Cd, As, Cr, Hg, Zn and Pb) contents from these biogas slurry samples were systematically investigated. On this basis, risk assessment of biogas slurry was also performed. The concentrations of COD, NH4+ and PO4-3 in biogas slurry samples with chicken manure as raw material were significantly higher than those of other raw materials. Therefore, the biogas slurry from chicken manure raw material demonstrated the most serious eutrophication threat. The antibiotic contents in biogas slurry samples from swine manure were the highest among five raw materials, mostly sulphonamides, quinolones and tetracyclines. Biogas slurry revealed particularly serious arsenic contamination and moderate potential ecological risk. The quadratic polynomial stepwise regression model can quantitatively describe the correlation among NH4+ - N, PO4-3 and heavy metals concentration of biogas slurry. This work demonstrated a universal potential threat from biogas slurry that can provide supporting data and theoretical basis for harmless treatment and reuse of biogas slurry.

关键词: Biogas slurry, Antibiotics, Heavy metals, Risk assessment

Abstract: Massive amounts of biogas slurry are produced due to the development of biogas plants. The pollution features and the risk of biogas slurry were fully evaluated in this work. Thirty-one biogas slurry samples were collected from sixteen different cities and five different raw materials biogas plants (e.g. cattle manure, swine manure, straw-manure mixture, kitchen waste and chicken manure). The chemical oxygen demand (COD), ammonia nitrogen (NH4+ - N), anions (e.g. Cl-,SO42-, NO3- and PO4-3), antibiotics (e.g. sulphonamides, quinolones, β2-receptor agonists, macrolides, tetracyclines and crystal violet) and heavy metals (e.g. Cu, Cd, As, Cr, Hg, Zn and Pb) contents from these biogas slurry samples were systematically investigated. On this basis, risk assessment of biogas slurry was also performed. The concentrations of COD, NH4+ and PO4-3 in biogas slurry samples with chicken manure as raw material were significantly higher than those of other raw materials. Therefore, the biogas slurry from chicken manure raw material demonstrated the most serious eutrophication threat. The antibiotic contents in biogas slurry samples from swine manure were the highest among five raw materials, mostly sulphonamides, quinolones and tetracyclines. Biogas slurry revealed particularly serious arsenic contamination and moderate potential ecological risk. The quadratic polynomial stepwise regression model can quantitatively describe the correlation among NH4+ - N, PO4-3 and heavy metals concentration of biogas slurry. This work demonstrated a universal potential threat from biogas slurry that can provide supporting data and theoretical basis for harmless treatment and reuse of biogas slurry.

Key words: Biogas slurry, Antibiotics, Heavy metals, Risk assessment