Near-infrared spectroscopy (NIRS) for a real time monitoring of the biogas process

摘要

Highlights?The use of NIRS to detect changes in specific biogas process monitoring-parameters was investigated.?Changes in tendency in the substrate-specific parameters are very well identifiable.?Fluctuations in the biocenosis degradation products in a biogas plant can be detected precisely after load modification.?NIRS data provide information on process instabilities and critical digester states in a spatiotemporal high resolution.AbstractIn this research project Near-infrared spectroscopy (NIRS) was applied to monitor the content of specific process parameters in anaerobic digestion. A laboratory scaled biogas digester was constantly fed every four hours with maize- and grass silage to keep a base load with an organic loading rate (OLR) of 2.5?kg?oDM/m3???d. Daily impact loads with shredded wheat up to an OLR of 8?kg?oDM/m3???d were added in order to gene