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Table 3 Assessment of available online-measurement equipment for biogas plants

From: Agricultural biogas production in Germany - from practice to microbiology basics

  Unit Effort Maintenance Robustness Cost Benefit
Biogas composition % (v/v) + - - 0 0 ++
Biogas rate m3 · d-1 0 0 ++ + +
pH   + - - - - 0
Redox potential mV + - - - - -
TS content % (m/m) + 0 ++ - +
VS content % (m/m) - - - - 0 - - ++
Temperature °C ++ ++ ++ ++ 0
SCFA content mg · L-1 - - - - ++ - - ++
Buffer capacity mg · L-1 - - - - ++ - - ++
  1. Rating: ++ very good; + good; 0 intermediate; - poor; - - very poor; TS, total solids; VS, volatile solids; SCFA, short-chain fatty acids; Modified and translated after [102].