TY - JOUR
T1 - Comparison of single-stage and two-stage thermophilic anaerobic digestion of food waste
T2 - Performance, energy balance and reaction process
AU - Xiao, Benyi
AU - Qin, Yu
AU - Wu, Jing
AU - Chen, Hong
AU - Yu, Panfen
AU - Liu, Junxin
AU - Li, Yu You
N1 - Funding Information:
We gratefully acknowledge the financial support from the Japan Science and Technology (JST) (Japanese-Chinese Research Cooperative Program on「Research and Development to Find Solutions to Environmental and Energy Issues in Urban Areas」,16769220A) and the China Scholarship Council (CSC) (Nos. 201504910086 and 201206230087 ).
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/1/15
Y1 - 2018/1/15
N2 - The single-stage and two-stage thermophilic anaerobic digestion (TAD) in lab scale continuously stirred tank reactor systems fed semi-continuously with food waste (FW) were studied to compare their performance, energy balance and reaction processes. The experimental results showed the two TADs both had good performance at a sludge retention time (SRT) of 30 d. The VS destruction (83.22 ± 1.33%) of the single-stage TAD was comparable with the two-stage TAD (82.02 ± 1.25%) during the steady period. While the average biogas yield of the two-stage TAD (0.810 ± 0.13 L/g Added VS) was higher than that of single-stage TAD (0.775 ± 0.20 L/g Added VS) and the methane content of the former (59.1 ± 1.4%) was lower than that of the latter (61.6 ± 2.1%), the methane yields of the two TADs were similar. The single stage TAD had higher energy recovery, rate and specific rate of reaction for the four AD steps than the two-stage TAD. The two-stage TAD had to adjust its operational parameters to improve its AD efficiency.
AB - The single-stage and two-stage thermophilic anaerobic digestion (TAD) in lab scale continuously stirred tank reactor systems fed semi-continuously with food waste (FW) were studied to compare their performance, energy balance and reaction processes. The experimental results showed the two TADs both had good performance at a sludge retention time (SRT) of 30 d. The VS destruction (83.22 ± 1.33%) of the single-stage TAD was comparable with the two-stage TAD (82.02 ± 1.25%) during the steady period. While the average biogas yield of the two-stage TAD (0.810 ± 0.13 L/g Added VS) was higher than that of single-stage TAD (0.775 ± 0.20 L/g Added VS) and the methane content of the former (59.1 ± 1.4%) was lower than that of the latter (61.6 ± 2.1%), the methane yields of the two TADs were similar. The single stage TAD had higher energy recovery, rate and specific rate of reaction for the four AD steps than the two-stage TAD. The two-stage TAD had to adjust its operational parameters to improve its AD efficiency.
KW - Energy balance assessment
KW - Food waste
KW - Performance
KW - Reaction process
KW - Single-stage thermophilic anaerobic digestion
KW - Two-stage thermophilic anaerobic digestion
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U2 - 10.1016/j.enconman.2017.10.092
DO - 10.1016/j.enconman.2017.10.092
M3 - Article
AN - SCOPUS:85033593586
SN - 0196-8904
VL - 156
SP - 215
EP - 223
JO - Energy Conversion and Management
JF - Energy Conversion and Management
ER -
