Journal
BIORESOURCE TECHNOLOGY
Volume 172, Issue -, Pages 91-96Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.09.010
Keywords
Wheat straw; Heme; Anaerobic digestion; Methane; NADH/NAD(+)
Funding
- Agricultural Ministry of China [201203050-1, 200903011-01]
- China Postdoctoral Science Foundation [2014M551527]
- Special Fund for Agro-scientific Research in the Public Interest
- Agricultural Science and Technology Innovation Fund of Jiangsu Province [CX(12)1002-3]
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Wheat straw particles were directly used as substrate for batch anaerobic digestion with anaerobic sludge under 35 degrees C to evaluate the effects of adding heme on methane production. When 1 mg/l heme was added to the fermentation process with no agitated speed, a maximum cumulative methane production of 12227.8 ml was obtained with cumulative methane yield of wheat straw was 257.4 ml/g-TS (total solid), which was increased by 20.6% compared with 213.5 ml/g-TS of no heme was added in the reactor. Meanwhile, oxido-reduction potential (ORP) level was decreased, the activity of coenzyme F-420 was significantly improved and NADH/NAD(+) ratio were the highest than other experimental groups. These results suggest that heme-supplemented anaerobic sludge with no agitated speed may be providing a more reductive environment, which is a cost-effective method of anaerobic digestion from biomass waste to produce methane with less energy consuming. (C) 2014 Elsevier Ltd. All rights reserved.
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