期刊
BIORESOURCE TECHNOLOGY
卷 225, 期 -, 页码 272-278出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.11.086
关键词
Ammonia inhibition; Anaerobic digestion; BMP; Co-digestion; Microalgae
资金
- Energinet.dk under the project framework ForskEL MicrobStopNH3-Innovative bioaugmentation strategies to tackle ammonia inhibition in anaerobic digestion process [2015-12327]
- Spanish Ministry of Economy and Competitiveness [ENE2013-45416-R, RYC-2014-16823]
- Community of Madrid [S2013/ABI-2783]
This study investigated the ability of an ammonia-acclimatized inoculum to digest efficiently protein-rich microalgae for continuous 3rd generation biogas production. Moreover, we investigated whether increased C/N ratio could alleviate ammonia toxicity. The biochemical methane potential (BMP) of five different algae (Chlorella vulgaris)/manure (cattle) mixtures showed that the mixture of 80/20 (on VS basis) resulted in the highest BMP value (431 mL CH4 g VS-1), while the BMP of microalgae alone (100/0) was 415 mL CH4 g VS-1. Subsequently, anaerobic digestion of those two substrates was tested in continuous stirred tank reactors (CSTR). Despite of the high ammonium levels (3.7-4.2 g NH4+ N L-1), CSTR reactors using ammonia tolerant inoculum resulted in relatively high methane yields (i. e. 77.5% and 84% of the maximum expected, respectively). These results demonstrated that ammonia tolerant inocula could be a promising approach to successfully digest protein-rich microalgae and achieve a 3rd generation biogas production. (C) 2016 Elsevier Ltd. All rights reserved.
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