Volume 7 Issue 2
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JIA Tongtong, WANG Zaizhao, GENG Fenghua, GONG Lei. Effect of Fe3O4 nanoparticles on anaerobic biogas production[J]. Journal of Environmental Engineering Technology, 2017, 7(2): 201-208. doi: 10.3969/j.issn.1674-991X.2017.02.030
Citation: JIA Tongtong, WANG Zaizhao, GENG Fenghua, GONG Lei. Effect of Fe3O4 nanoparticles on anaerobic biogas production[J]. Journal of Environmental Engineering Technology, 2017, 7(2): 201-208. doi: 10.3969/j.issn.1674-991X.2017.02.030
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Effect of Fe3O4 nanoparticles on anaerobic biogas production

doi: 10.3969/j.issn.1674-991X.2017.02.030

  • Academy of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

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  • Corresponding author: Lei GONG E-mail: goalucky@qust.edu.cn
  • Received Date: 2016-08-23
  • Publish Date: 2017-03-20
    Abstract
  • Fe3O4 nanoparticles was made by coprecipitation, and characterized for scanning electron microscope (SEM). The effect of different concentration of Fe3O4 nanoparticles on volume gas production and CH4 ratio during the anaerobic digestion process at the medium temperature of 35 ℃ was examined. The results showed that Fe3O4 nanoparticles of 100 mg/L maintained ammonia at the level of 600-1 200 mg/L, pH at 7-8, and improved TCODCr and SCODCr degradation rates by 8.35% and 9.90%, respectively. This amount of Fe3O4 nanoparticles produced maximum concentration of volatile fatty acids (VFAs), which can reach 4 300 mg/L, and strengthened the use of acetic acid. Fe3O4 nanoparticles of 100 mg/L improved the biogas production. Compared with the control group, the system increased the gas production by 28.08%, decreased the gas production cycles by two days and increased the methane content by 6%.

     

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