Microalgae-bacteria flocs (MaB-Flocs) as a substrate for fermentative biogas production

Journal
Bioresource technology  
Volume
194
Start Page
130
End Page
136
Citation
Bioresource Technology (194): 130-136 (2015)
Publisher DOI
10.1016/j.biortech.2015.06.104
Scopus ID
2-s2.0-84937060753
PubMed ID
26188555
Publisher
Elsevier Science
© 2015 Elsevier Ltd. 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.
Subjects
Anaerobic digestion
Biogas production
Inoculum source
Microalgae-bacteria flocs (MaB-Flocs)
Pre-treatment
DDC Class
500: Naturwissenschaften
570: Biowissenschaften, Biologie
600: Technik
620: Ingenieurwissenschaften