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Shubiao Wu

Design and test of alkalinity and VFA online monitoring system in anaerobic fermentation

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  • Shubiao Wu
  • Wenwen Gu, China Agricultural University
  • ,
  • Changle Pang, China Agricultural University
  • ,
  • Renjie Dong, China Agricultural University
  • ,
  • Yuanfang Deng, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology

Lack of buffering capacity of fermentation substrate in anaerobic digestion may easily lead to acidification. Alkalinity is a key indicator for measuring buffering capacity of the fermentation substrate, so its online monitoring should be enhanced to keep the anaerobic fermentation process stable automatically. An online monitoring system based on joint titration of alkalinity and VFA was designed. The software system was introduced in detail. The system could determine alkalinity and VFA simultaneously, which achieved real-time curve display and pH meter calibration. Moreover, automatic analysis could be realized. The experiment results showed that the system had the ability of the rapid determination of alkalinity and VFA in the fermentation process. The relative standard deviation was less than 5%, which was lower than the manual titration and indicated a high measurement accuracy of the proposed system.

TidsskriftNongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Sider (fra-til)172-176
Antal sider5
StatusUdgivet - okt. 2013
Eksternt udgivetJa

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