2020/03/10 by Wieczorek, Nils, Kücüker, Mehmet Ali, Kuchta, Kerstin
#Anaerobic digestion #Biogas production #Biologie #Biowissenschaften #Ingenieurwissenschaften #Inoculum source #Microalgae-bacteria flocs (MaB-Flocs) #Naturwissenschaften #Pre-treatment #Technik
paper · doi:10.15480/882.2705
Biogas production from the microalgae-bacteria flocs (MaB-Flocs) in batch reactors was conducted in this study. A batch test was performed to determine optimum inoculums that were taken from a running biogas plant (BP), a municipal wastewater treatment plant (MWTP) and a river sediment (RS). The maximum biogas yield (304.83±4.23mL per gram volatile solids introduced (mLg-VS-1)) was obtained with the inoculum from MWTP. Subsequently, the effect of substrate-inoculum (S/I) ratios, temperature and pre-treatment methods on fermentative biogas and methane production was investigated. The optimum S/I ratios and incubation temperature were determined as 0.2gVSsubstrate/gVSinoculum and 37±1°C, respectively. The results of the CH4 fermentation show that the methane yields could be increased from 216.72±3.52mLCH4g-VS-1 to 271.34±6.65mLg-VS-1 by using enzymatic pre-treatment at the S/I ratio of 0.2gVSsubstrate/gVSinoculum and mesophilic conditions.