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Enhancing methane production from waste activated sludge using a novel indigenous iron activated peroxidation pre-treatment process

Journal Article


Abstract


  • Methane production from anaerobic digestion of waste activated sludge (WAS) is limited by the slow hydrolysis rate and/or poor methane potential of WAS. This study presents a novel pre-treatment strategy based on indigenous iron (in WAS) activated peroxidation to enhance methane production from WAS. Pre-treatment of WAS for 30min at 50mg H2O2/g total solids (dry weight) and pH 2.0 (iron concentration in WAS was 7mg/g TS) substantially enhanced WAS solubilization. Biochemical methane potential tests demonstrated that methane production was improved by 10% at a digestion time of 16d after incorporating the indigenous iron activated peroxidation pre-treatment. Model-based analysis indicated that indigenous iron activated peroxidation pre-treatment improved the methane potential by 13%, whereas the hydrolysis rate was not significantly affected. The economic analysis showed that the proposed pre-treatment method can save the cost by $112,000 per year in a treatment plant with a population equivalent of 300,000.

UOW Authors


  •   Zhou, Xu (external author)
  •   Wang, Qilin (external author)
  •   Jiang, Guangming

Publication Date


  • 2015

Citation


  • Zhou, X., Wang, Q. & Jiang, G. (2015). Enhancing methane production from waste activated sludge using a novel indigenous iron activated peroxidation pre-treatment process. Bioresource Technology, 182 267-271.

Scopus Eid


  • 2-s2.0-84923019496

Number Of Pages


  • 4

Start Page


  • 267

End Page


  • 271

Volume


  • 182

Place Of Publication


  • Netherlands

Abstract


  • Methane production from anaerobic digestion of waste activated sludge (WAS) is limited by the slow hydrolysis rate and/or poor methane potential of WAS. This study presents a novel pre-treatment strategy based on indigenous iron (in WAS) activated peroxidation to enhance methane production from WAS. Pre-treatment of WAS for 30min at 50mg H2O2/g total solids (dry weight) and pH 2.0 (iron concentration in WAS was 7mg/g TS) substantially enhanced WAS solubilization. Biochemical methane potential tests demonstrated that methane production was improved by 10% at a digestion time of 16d after incorporating the indigenous iron activated peroxidation pre-treatment. Model-based analysis indicated that indigenous iron activated peroxidation pre-treatment improved the methane potential by 13%, whereas the hydrolysis rate was not significantly affected. The economic analysis showed that the proposed pre-treatment method can save the cost by $112,000 per year in a treatment plant with a population equivalent of 300,000.

UOW Authors


  •   Zhou, Xu (external author)
  •   Wang, Qilin (external author)
  •   Jiang, Guangming

Publication Date


  • 2015

Citation


  • Zhou, X., Wang, Q. & Jiang, G. (2015). Enhancing methane production from waste activated sludge using a novel indigenous iron activated peroxidation pre-treatment process. Bioresource Technology, 182 267-271.

Scopus Eid


  • 2-s2.0-84923019496

Number Of Pages


  • 4

Start Page


  • 267

End Page


  • 271

Volume


  • 182

Place Of Publication


  • Netherlands