Publication: Effects of hydraulic retention time and organic loading rate on performance and stability of anaerobic digestion of Spirulina platensis
Issued Date
2016-07-01
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ISSN
15375110
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2-s2.0-84965130795
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Mahidol University
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SCOPUS
Bibliographic Citation
Biosystems Engineering. Vol.147, (2016), 174-182
Suggested Citation
Natthiporn Aramrueang, Joshua Rapport, Ruihong Zhang Effects of hydraulic retention time and organic loading rate on performance and stability of anaerobic digestion of Spirulina platensis. Biosystems Engineering. Vol.147, (2016), 174-182. doi:10.1016/j.biosystemseng.2016.04.006 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/43443
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Title
Effects of hydraulic retention time and organic loading rate on performance and stability of anaerobic digestion of Spirulina platensis
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Abstract
© 2016 IAgrE. 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] l-1d-1) resulted in the biogas and methane yields in the range of 0.276-0.502 l [g VS]-1and 0.163-0.342 l [g VS]-1, respectively. The methane yield decreased with the increase in OLR and the reduction in HRT. Maximum methane yield of 0.342 l [g VS]-1was produced when the digester was operated at OLR of 1.0 [g VS] l-1d-1and 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] l-1d-1, at which the digestion was not limited by high ammonia levels or volatile fatty acid accumulation.