Evaluating biomethane production from anaerobic mono- and co-digestion of food waste and floatable oil (FO) skimmed from food waste.
Batch anaerobic digestion was employed to investigate the performance of the floatable oil (FO) skimmed from food waste (FW) and the effect of different FO concentrations (5, 10, 20, 30, 40 and 50g/L) on biomethane production and system stability. FO and FO+FW were mono-digested and co-digested. The results showed that FO and FO+FW could be well anaerobically converted to biomethane in appropriate loads. For the mono-digestions of FO, the biomethane yield, TS and VS reduction achieved 607.7-846.9mL/g, 69.7-89% and 84.5-92.8%, respectively, when FO concentration was 5-40g/L. But the mono-digestion appeared instability when FO concentration was 50g/L. For the co-digestions of FW+FO, TS and VS reductions reached 70.7-86.1% and 87.5-91.4%, respectively, when FO concentration was 5-30g/L. However, the inhibition occurred when FO concentrations increased to 40-50g/L. The maximal FO loads of 40g/L and 30g/L were hence suggested for efficient mono-digestions and co-digestions of FO and FO+FW.
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Ying
Y
Meng
College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Puzhu Nanlu 30, Jiangpu District, Nanjing 211816, PR China.
Sang
S
Li
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Hairong
H
Yuan
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Dexun
D
Zou
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Yanping
Y
Liu
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Baoning
B
Zhu
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Akiber
A
Chufo
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Muhammad
M
Jaffar
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China. Electronic address: xjlibuct@gmail.com.
Xiujin
X
Li
D001421:Bacteria, Anaerobic / Q000378:metabolism*; D004042:Dietary Fats, Unsaturated / Q000302:isolation & purification / Q000378:metabolism*; D005516:Food Microbiology / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control*; D008697:Methane / Q000302:isolation & purification* / Q000378:metabolism*
D004042:Dietary Fats, Unsaturated; D007220:Industrial Waste; D008697:Methane
Co-digestion; Floatable oil (FO); Food waste (FW); Mono-digestion