Enhanced mesophilic bio-hydrogen production of raw rice straw and activated sewage sludge by co-digestion
(2015) In International Journal of Hydrogen Energy 40(46). p.16033-16044- Abstract
- In this study, batch biohydrogen production by co-digestion of raw rice straw and activated sewage sludge was investigated with different inoculum heat treatment, pH, S/X ratio (based on VS) and substrate sizes under mesophilic condition. In order to achieve a high bio-hydrogen yield and methanogens activity inhibition, heat treatment of inoculum was optimized at different exposure times (30, 45 & 60 min) and temperature ranges (80, 90 and 100 °C) prior to dark fermentation process. Collected data was analysed using response surface methodology (RSM). The heat treatment of inoculum at 100 °C for 60 min produced the highest bio-hydrogen yield of 14.22 NmL H2/g VS at concentration of 70.97% and Production of 0.073 NmL CH4/g VS at 0.17%... (More)
- In this study, batch biohydrogen production by co-digestion of raw rice straw and activated sewage sludge was investigated with different inoculum heat treatment, pH, S/X ratio (based on VS) and substrate sizes under mesophilic condition. In order to achieve a high bio-hydrogen yield and methanogens activity inhibition, heat treatment of inoculum was optimized at different exposure times (30, 45 & 60 min) and temperature ranges (80, 90 and 100 °C) prior to dark fermentation process. Collected data was analysed using response surface methodology (RSM). The heat treatment of inoculum at 100 °C for 60 min produced the highest bio-hydrogen yield of 14.22 NmL H2/g VS at concentration of 70.97% and Production of 0.073 NmL CH4/g VS at 0.17% concentration in total produced biogas. The raw rice straw was also co-digested with heat-treated inoculum at different ratios of volatile solids (2:1, 4:1 and 6:1) and initial pH (4, 4.75 and 5.5) as numerical variables and 4 categories of substrate size ((250–500 μm], (500 μm-2mm], (2–20 mm), [20–30 mm]). The highest bio-hydrogen yield of 14.70 NmL/g VS was recognized at the optimum initial pH of 5.01 and S/X ratio of 4.54:1 using 2–20 mm rice straw. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/856e6567-4db7-4ebc-87b1-1fb01603d7b3
- author
- Alemahdi, Nika LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bio-hydrogen, Co-digestion, Activated sewage sludge, Rice straw, Response surface methodology, S/X ratio
- in
- International Journal of Hydrogen Energy
- volume
- 40
- issue
- 46
- pages
- 11 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:84955422586
- ISSN
- 0360-3199
- DOI
- 10.1016/j.ijhydene.2015.08.106
- language
- English
- LU publication?
- yes
- id
- 856e6567-4db7-4ebc-87b1-1fb01603d7b3
- date added to LUP
- 2016-04-12 11:32:55
- date last changed
- 2022-01-30 02:33:40
@article{856e6567-4db7-4ebc-87b1-1fb01603d7b3,
abstract = {{In this study, batch biohydrogen production by co-digestion of raw rice straw and activated sewage sludge was investigated with different inoculum heat treatment, pH, S/X ratio (based on VS) and substrate sizes under mesophilic condition. In order to achieve a high bio-hydrogen yield and methanogens activity inhibition, heat treatment of inoculum was optimized at different exposure times (30, 45 & 60 min) and temperature ranges (80, 90 and 100 °C) prior to dark fermentation process. Collected data was analysed using response surface methodology (RSM). The heat treatment of inoculum at 100 °C for 60 min produced the highest bio-hydrogen yield of 14.22 NmL H2/g VS at concentration of 70.97% and Production of 0.073 NmL CH4/g VS at 0.17% concentration in total produced biogas. The raw rice straw was also co-digested with heat-treated inoculum at different ratios of volatile solids (2:1, 4:1 and 6:1) and initial pH (4, 4.75 and 5.5) as numerical variables and 4 categories of substrate size ((250–500 μm], (500 μm-2mm], (2–20 mm), [20–30 mm]). The highest bio-hydrogen yield of 14.70 NmL/g VS was recognized at the optimum initial pH of 5.01 and S/X ratio of 4.54:1 using 2–20 mm rice straw.}},
author = {{Alemahdi, Nika}},
issn = {{0360-3199}},
keywords = {{Bio-hydrogen; Co-digestion; Activated sewage sludge; Rice straw; Response surface methodology; S/X ratio}},
language = {{eng}},
number = {{46}},
pages = {{16033--16044}},
publisher = {{Elsevier}},
series = {{International Journal of Hydrogen Energy}},
title = {{Enhanced mesophilic bio-hydrogen production of raw rice straw and activated sewage sludge by co-digestion}},
url = {{http://dx.doi.org/10.1016/j.ijhydene.2015.08.106}},
doi = {{10.1016/j.ijhydene.2015.08.106}},
volume = {{40}},
year = {{2015}},
}