Journal article
Efficient anaerobic digestion of whole microalgae and lipid-extracted microalgae residues for methane energy production
Bioresource technology, Vol.161(June 2014), pp.423-430
06/2014
Handle:
https://hdl.handle.net/2376/107899
PMID: 24736123
Abstract
•SMP for whole microalgae were better than lipid-extracted microalgae residues.•The control of I/S ratio during BMP could overcome pH drop and LCFA inhibition.•No signs of VFA or ammonia inhibition occurred when digested at I/S⩾1.0 ratio.•Higher methane production was not related to species but to lipid content of biomass.
The primary aim of this study was to completely investigate extensive biological methane potential (BMP) on both whole microalgae and its lipid-extracted biomass residues with various degrees of biomass pretreatment. Specific methane productivities (SMP) under batch conditions for non-lipid extracted biomass were better than lipid-extracted biomass residues and exhibited no signs of ammonia or carbon/nitrogen (C/N) ratio inhibition when digested at high I/S ratio (I/S ratio⩾1.0). SMP for suitably extracted biomass ranged from 0.30 to 0.38LCH4/gVS (volatile solids). For both whole and lipid-extracted biomass, overall organic conversion ranged from 59.33 to 78.50 as a measure of %VS reduction with greater percentage biodegradability in general found within the lipid-extracted biomass. Higher production levels correlated to lipid content with a linear relationship between SMP and ash-free lipid content being developed at a R2 of 0.814.
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Details
- Title
- Efficient anaerobic digestion of whole microalgae and lipid-extracted microalgae residues for methane energy production
- Creators
- Baisuo Zhao - Biological Systems Engineering, Washington State University, Pullman, WA 99164, USAJingwei Ma - Biological Systems Engineering, Washington State University, Pullman, WA 99164, USAQuanbao Zhao - Biological Systems Engineering, Washington State University, Pullman, WA 99164, USALieve Laurens - National Renewable Energy Laboratory, Golden, CO 80401-3305, USAEric Jarvis - National Renewable Energy Laboratory, Golden, CO 80401-3305, USAShulin Chen - Biological Systems Engineering, Washington State University, Pullman, WA 99164, USACraig Frear - Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
- Publication Details
- Bioresource technology, Vol.161(June 2014), pp.423-430
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900546891901842
- Language
- English
- Resource Type
- Journal article