Publication: Biogas production by co-digestion of municipal wastewater and food waste: Performance in semi-continuous and continuous operation
Issued Date
2020-01-01
Resource Type
ISSN
15547531
10614303
10614303
DOI
Other identifier(s)
2-s2.0-85089487597
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Mahidol University
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SCOPUS
Bibliographic Citation
Water Environment Research. (2020)
Suggested Citation
Weerawat Ounsaneha, Cheerawit Rattanapan, Thunwadee Tachapattaworakul Suksaroj, Duangporn Kantachote, Wichuda Klawech, Tanawat Rakkamon Biogas production by co-digestion of municipal wastewater and food waste: Performance in semi-continuous and continuous operation. Water Environment Research. (2020). doi:10.1002/wer.1413 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/59097
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Title
Biogas production by co-digestion of municipal wastewater and food waste: Performance in semi-continuous and continuous operation
Abstract
© 2020 Water Environment Federation Municipal wastewater has recently attracted interest in relation to anaerobic wastewater treatments. Biogas production with co-digestion of mixed substrates has been proposed and has many potential benefits for municipal wastewater. The aim of this research was to assess the performance of biogas production during co-digestion of municipal wastewater and food waste under semi-continuous and continuous operation with various hydraulic retention times (HRTs). A laboratory-scale continuous stirred tank reactor (CSTR) at room temperature operation (27–32°C) was employed in this research. The highest methane yields of 167.41 ± 66.52, 194.35 ± 85.44, and 214.81 ± 85.44 ml/g-Vs were found in semi-continuous mode, respectively, at 30, 10, and 10 days of HRTs with a 10:90 ratio of municipal wastewater to food waste (based on TS). Result finding of optimum condition (10 days of HRTs) presented a methane yield of 485.58 ± 82.35 ml/g with continuous operation. Hence, food waste has practical implications for use as a co-substrate with the optimization condition of HRT and operation mode for biogas production from municipal wastewater. Practitioner points: Food waste has good potential for use as a co-substrate for biogas production from municipal wastewater. HRT reduction from 30 to 10 days in semi-continuous, biogas production from municipal wastewater and food waste increased by 59%. Co-digestion of municipal wastewater and food waste with continuous mode and 10 days of HRT was the effective biogas production.