This study investigates the effect of catch crops as co-substrate on manure-based anaerobic digestion. Batch experiments were carried out for two catch crops, namely Italian ryegrass (IR) and oil seed radish (OSR), in co-digestion with manure. Methane yields in the range of 271–558 and 216–361 ml CH4/g volatile solids (VS) were obtained for OSR and IR in co-digestion, respectively. OSR co-digestion was chosen for semi-continuous reactor experiments. The addition of 50 % of OSR to manure (on VS basis) in semi-continuous anaerobic digestion resulted in a methane yield of 348 ml CH4/g VS, an improvement of 1.46 times compared to manure alone. Adaptation to OSR was observed, and no ammonia or volatile fatty acid-mediated inhibition was detected. The results prove that it is feasible to use catch crops as co-substrate for manure-based biogas production, obtaining a stable process with significantly higher methane yields than that of manure alone.
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- Blohm, Marina
- Boie, Wulf
- Büttner, Clara
- Cordroch, Luisa
- Cußmann, Ilka
- Dettner, Franziska
- Fleischer, Christian
- Freißmann, Jonas
- Fritz, Malte
- Günther, Stephan
- Hackenberg, Tabitha
- Hasan, ASM Mominul
- Hilpert, Simon
- Irmansyah Siregar, Yudha
- Laros, Simon
- Md Nasimul Islam Maruf
- Müller, Ulf Philipp
- Vanegas-Cantarero, Maria
- Weber, Samanta Alena
- Wiechers, Eva
- Witte, Francesco
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