Effects of sludge pretreatments and organic acids on hydrogen production by anaerobic fermentation.
Using apple pomace (AP) as substrate, a series of batch experiments were conducted to investigate the effects of activated sludge pretreated by ultraviolet and ultrasonic on the anaerobic fermentative bio-H(2) production. The results show that a maximum cumulative H(2) production (CHP(m)) of 107.0mlg(-1)-TS and an average H(2) production rate (AHPR) of 15.0mlg(-1)-TSh(-1) were obtained by using the pretreated sludge that was irradiated by ultraviolet lamp (25w) for 15min as inoculant. Based on the optimal sludge pretreatment method, the experiments of bio-H(2) production under the optimal substrate pretreatment condition (soaked in the ammonia liquor of 6% for 24h) were further carried out, and the CHP(m) of 138.8mlg(-1)-TS was achieved, increased by 80.6% compared to the un-pretreated group (76.8mlg(-1)-TS). The effects of the various organic acids on the fermentative H(2) production were also investigated under the above optimal sludge pretreatment condition.
Wang
Hui
H
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi'an, PR China. huiwang@nwu.edu.cn
Fang
Ming
M
Fang
Zhong
Z
Bu
Huaiyu
H
D000143:Acids / Q000737:chemistry*; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D005285:Fermentation / Q000502:physiology; D006859:Hydrogen / Q000737:chemistry / Q000378:metabolism*; D009930:Organic Chemicals / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology*
D000143:Acids; D009930:Organic Chemicals; D012722:Sewage; D006859:Hydrogen