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Shubiao Wu

Performances of vegetable waste as substrate for biogas production

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  • Zhuang Zuo, China Agricultural University
  • ,
  • Shubiao Wu
  • Yongchang Gao, China Agricultural University
  • ,
  • Renjie Dong, China Agricultural University

Anaerobic digestion is an attractive environment-friendly biotechnological method for reducing the pollution and energy recovery. The biochemical methane potential of 10 market vegetable wastes samples at (37±1)°C, the ultimate methane yields of every gram volatile solids and kinetics ranged from 232.8~332.9 ml and 0.089~0.138 d-1, respectively. Methane yields and kinetics of vegetable wastes are different varieties. The related coefficient R2 was great than 0.98. Then, continuous anaerobic digestion of vegetable waste stable at below every day each liter 1.5 g volatile solids, and pH above 7.0. With organic loading rate increased to every day each liter 2.5 g volatile solids, a lower gas yield occur in reactor 2. When organic loading rate at every day each liter 3 g volatile solids, reactor 1 and reactor 3 caused a lower gas yield and lower CH4 content. Based on the anaerobic digestion mechanism, explain the possible reasons: Easy biodegradable organic wastes caused a fall in pH during high loading rate; Carbohydrate-rich substrates are fast producers of volatile fatty acids (VFAs) and accumulated which not used by Methanogens. These advices give inspiration and reference for the anaerobic treatment of vegetable waste.

OriginalsprogEngelsk
TidsskriftTongji Daxue Xuebao/Journal of Tongji University
Vol/bind40
NummerSUPPL.2
Sider (fra-til)21-26
Antal sider6
ISSN0253-374X
DOI
StatusUdgivet - dec. 2012
Eksternt udgivetJa

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