Abstract
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.
Original language | American English |
---|---|
Pages (from-to) | 423-430 |
Number of pages | 8 |
Journal | Bioresource Technology |
Volume | 161 |
DOIs | |
State | Published - 2014 |
NREL Publication Number
- NREL/JA-5100-61996
Keywords
- Anaerobic digestion
- Lipid-extracted microalgae residues
- Methane production
- Microalgae