The Influence of Micro-Oxygen Addition on Desulfurization Performance and Microbial Communities during Waste-Activated Sludge Digestion in a Rusty Scrap Iron-Loaded Anaerobic Digester
作者: Renjun RuanJiashun CaoChao LiDi ZhengJingyang Luo
作者单位: 1ey Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
2Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
3Key Laboratory of Integrated Regulation and Resource Development on Shal
刊名: Energies, 2017, Vol.10 (2)
来源数据库: Directory of Open Access Journals
DOI: 10.3390/en10020258
关键词: Micro-oxygenAnaerobic digestionChemical corrosionAverage methane yieldSulfur-oxidizing bacteriaDesulfurization efficiencySulfur balance
原始语种摘要: In this study, micro-oxygen was integrated into a rusty scrap iron (RSI)-loaded anaerobic digester. Under an optimal RSI dosage of 20 g/L, increasing O2 levels were added stepwise in seven stages in a semi-continuous experiment. Results showed the average methane yield was 306 mL/g COD (chemical oxygen demand), and the hydrogen sulphide (H2S) concentration was 1933 ppmv with RSI addition. O2 addition induced the microbial oxidation of sulphide by stimulating sulfur-oxidizing bacteria and chemical corrosion of iron, which promoted the generation of FeS and Fe2S3. In the 6th phase of the semi-continuous test, deep desulfurization was achieved without negatively impacting system performance. Average methane yield was 301.1 mL/g COD, and H2S concentration was 75 ppmv. Sulfur mass balance was...
全文获取路径: DOAJ  (合作)
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关键词翻译
关键词翻译
  • oxidizing 氧化
  • oxygen 
  • Digestion 消化
  • methanogenesis 甲烷生成
  • microbial 微生物的
  • methanogens 甲烷微生物
  • bacteria 细菌
  • digestion 消化
  • achieved 获得的
  • enrich 丰富