Recycling of food waste for fuel precursors using an integrated bio-refinery approach

Karthikeyan, O.P., Nguyen Hao, H.T., Razaghi, Ali, and Heimann, Kirsten (2018) Recycling of food waste for fuel precursors using an integrated bio-refinery approach. Bioresource Technology, 248 (Part A). pp. 194-198.

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The main aim was to integrate FW-recycling with cultivation of Rhodotorula glutinis and anaerobic digestion (AD) for bio-energy and-fuel recovery. Mixed FW was mechanically macerated (Pcon) and hydrolysed (at 250 g L-1 water) via chemical (Ch), thermal (Th) and TCh (combined Ch and Th) treatments. Cleared hydrolysates from individual pre-treatment processes were used as culture medium for cultivation of R. glutinis, while the residual solids (RS) were subjected to AD. Pcon cultivation yielded maximal R. glutinis dry weight biomass (5.18 g L-1) and total fatty acid contents (1.03 g g(-1) DWbiomass). Dominant fatty acid methyl esters (FAME) were Palmitic -(C-16: 0-26%); Stearic -(C-18: 0-17%) and Oleic acids (C-18: 1-38%), ideal for bio-diesel production. Highest methane yields (actual similar to 0.139 m(3) kg(-1) volatile solids) were measured from AD of Th-derived RS. Thus integrated FW recycling approaches will be more feasible for generating energy and economic incentives. (C) 2017 Elsevier Ltd. All rights reserved.

Item ID: 51818
Item Type: Article (Research - C1)
ISSN: 1873-2976
Keywords: Food waste, Biorefinery, Rhodotorula glutinis, Anaerobic digestion, Fatty acid methyl esters, Methane
Copyright Information: Copyright © 2017 Elsevier Ltd.
Funders: Australian Government’s Cooperative Research Centre Scheme
Projects and Grants: CRC grant number 2.3.4.
Date Deposited: 20 Dec 2017 07:32
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4103 Environmental biotechnology > 410303 Bioremediation @ 50%
40 ENGINEERING > 4011 Environmental engineering > 401106 Waste management, reduction, reuse and recycling @ 50%
SEO Codes: 17 ENERGY > 1708 Renewable energy > 170801 Biofuel energy @ 50%
17 ENERGY > 1707 Processing of energy sources > 170701 Biomass processing @ 50%
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