Ensiling fermentation reveals pre-treatment effects for anaerobic digestion of sugarcane biomass: an assessment of ensiling additives on methane potential

Janke, Leandro and McCabe, Bernadette Kathleen and Harris, Peter and Hill, Andrew and Lee, Seonmi and Weinrich, Soren and Marchuk, Serhiy and Baillie, Craig (2019) Ensiling fermentation reveals pre-treatment effects for anaerobic digestion of sugarcane biomass: an assessment of ensiling additives on methane potential. Bioresource Technology, 279. pp. 398-403. ISSN 0960-8524

Abstract

Ensiling of sugarcane trash (SCT) and sugarcane stalks (SCS) was studied to assess the effects of molasses (MOL) and lactic acid bacteria (LAB) inoculant on methane potential. The experiment was run for 70 days and monitoring parameters were analyzed at days 0, 5, 15 and 70. Biochemical methane potential (BMP) tests performed with fresh and ensiled material at day 70 showed an increase in methane potential by 24.0%, 23.4%, 1.7% and 71.1% for SCSctr, SCTctr, SCTmol and SCTmol + lab, respectively. Such improved performance is explained by the formation of organic acids (mostly acetate and lactate) which were able to decrease the pH of the silages from 5.7–5.9 to 3.8–4.2 for all SCT treatments and from 5.9 up to 3.4 for SCS treatment. Thus, the ensiling process provided similar effects to a pre-treatment at low acid concentrations, which in turn improved the digestibility of the cellulosic biomass for methane production.


Statistics for USQ ePrint 35904
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Agricultural Engineering
Date Deposited: 14 May 2019 04:38
Last Modified: 13 Jun 2019 02:22
Uncontrolled Keywords: sugarcane; ensiling process; anaerobic digestion; kinetics modelling; biogas production
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective: B Economic Development > 85 Energy > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy
Identification Number or DOI: 10.1016/j.biortech.2019.01.143
URI: http://eprints.usq.edu.au/id/eprint/35904

Actions (login required)

View Item Archive Repository Staff Only