Journal article
Effects of increasing organic loading rates on reactor performance and the methanogenic community in a new pilot upflow solid reactor for continuously processing food waste
Renewable energy, Vol.153, pp.420-429
06/2020
Handle:
https://hdl.handle.net/2376/108221
Abstract
A new pilot upflow solid reactor (USR) for the anaerobic digestion (AD) of food waste was developed and the reactor performance was investigated. The methanogenic microbial community was examined using high-throughput 16S rRNA gene sequencing technology to identify changes in the community in the new reactor with continuous operation at different organic loading rates (OLRs, from 5.2 ± 0.5 to 18.8 ± 0.8 kg COD/(m³·d)) to help understand the reactor performance. A Methanosaeta-dominated methanogenic community was successfully established when the OLR was between 7.0 and 7.6 kg COD/(m³·d). Under these conditions, the average COD removal efficiency was greater than 82% and the average methane yield reached a 280 L/kg CODremoval. When the OLR was greater than 18.8 kg COD/(m³·d), the COD removal efficiency drastically decreased and volatile fatty acids (VFAs) quickly accumulated. The results confirmed that Methanosaeta dominance has a positive effect on reactor performance and methane yield when food waste is treated under an OLR of 7.0 ± 0.7 kg COD/(m³·d). This study demonstrates that the microbial population can be manipulated by changing the reaction conditions and the USR, which has a simple structure and operation, has great potential to handle high-OLR food waste.
•Food waste anaerobic digestion in pilot Upflow Solid Reactor (USR) was examined.•82.0% of average COD removal was achieved at average OLR of 7.0 kgCOD/(m3·d).•Methanosaeta-dominated community was found in the process of OLR rising.•Average CH4 yield was achieved at 280 L/kgCODremoval.
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Details
- Title
- Effects of increasing organic loading rates on reactor performance and the methanogenic community in a new pilot upflow solid reactor for continuously processing food waste
- Creators
- Demao Li - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaRuohao Tang - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaLiang Yu - Department of Biological Systems Engineering, Washington State University, Pullman, WA99164, USALimei Chen - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaShulin Chen - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaSong Xu - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaFeng Gao - Tianjin Key Laboratory for Industrial Biosystem and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- Publication Details
- Renewable energy, Vol.153, pp.420-429
- Publisher
- Elsevier Ltd
- Identifiers
- 99900582329101842
- Language
- English
- Resource Type
- Journal article