期刊
BIOSYSTEMS ENGINEERING
卷 147, 期 -, 页码 174-182出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biosystemseng.2016.04.006
关键词
Anaerobic digestion; Spirulina; Biogas; Hydraulic retention time; Organic loading rate
资金
- Royal Thai Government
- University of California
The effects of hydraulic retention time (HRT) and organic loading rate (OLR) were investigated during a continuous anaerobic digestion of Spirulina platensis. The continuous process operated with varying HRT (10-25 d) and OLR (1.0-4.0 [g VS]1(-1) d(-1)) resulted in the biogas and methane yields in the range of 0.276-0.5021 [g VS](-1) and 0.163-0.3421 [g VS](-1), respectively. The methane yield decreased with the increase in OLR and the reduction in HRT. Maximum methane yield of 0.342 1 [g VS](-1) was produced when the digester was operated at OLR of 1.0 [g VS]1(-1) d(-1) and 25 d HRT. A mathematical model was developed from a kinetic study for predicting methane yield as the function of HRT during a continuous digestion. The model performed well at OLR lower than 2.0 [g VS]1(-1) d(-1), at which the digestion was not limited by high ammonia levels or volatile fatty acid accumulation. (C) 2016 IAgrE. Published by Elsevier Ltd. All rights reserved.
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