The effects of alternative pretreatment strategies on anaerobic digestion and methane production from different algal strains.
Bioresour Technol
; 155: 366-72, 2014 Mar.
Article
em En
| MEDLINE
| ID: mdl-24468544
ABSTRACT
The effect of various pretreatment strategies on methane yields following anaerobic digestion (AD) of five different microalgal strains was investigated. Pavlova_cf sp., Tetraselmis sp. and Thalassiosira weissflogii exhibited substantial methane yields of 0.4-0.5L/g volatile solids (VS) without pretreatment, providing up to 75-80% of theoretical values. In contrast, methane yields from Chlorella sp. and Nannochloropsis sp. were around 0.35L/g VS, or 55-60% of the theoretical values, respectively. Alkali treatment was not effective and thermal pretreatment only enhanced Nannochloropsis methane yields. Thermochemical pretreatment had the strongest impact on biomass solubilization with methane yields increasing by 30% and 40% for Chlorella and Nannochloropsis, respectively. The lipid content had a strong beneficial impact on the theoretical and observed methane yields as compared to protein and carbohydrate content. Other features such as cell-wall composition are also likely to be important factors dictating algal biodegradability and methane yields addressed in part by thermochemical pretreatment.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reatores Biológicos
/
Clorófitas
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Biocombustíveis
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Haptófitas
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Estramenópilas
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Temperatura Alta
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Metano
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2014
Tipo de documento:
Article