Cultivation of Chlorella vulgaris on wastewater containing high levels of ammonia for biodiesel production.
Bioresour Technol
; 129: 177-81, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-23246758
ABSTRACT
The feasibility of cultivating Chlorella vulgaris with wastewater containing high ammonia nitrogen concentrations was examined. The average specific growth rate of C. vulgaris was 0.92 d(-1) at 17 mg L(-1) NH4+-N, but declined to 0.33 d(-1) at NH4+-N concentrations of 39-143 mg L(-1). At 39 mg L(-1) NH4+-N, lipid productivity reached a maximum value (23.3 mg L(-1)d(-1)) and dropped sharply at higher NH4+-N levels, which demonstrated NH4+-N should be controlled for biodiesel production. C16 and C18 fatty acids accounted for 80% of total fatty acids. Increasing NH4+-N from 17 to 207 mg L(-1) yielded additional short-chain and saturated fatty acids. Protein content was in positive correlation with NH4+-N content from 17 mg L(-1) (12%) to 207 mg L(-1) (42%). Carbohydrate in the dried algae cell was in the range of 14-45%, with a peak value occurring at 143 mg L(-1) NH4+-N. The results demonstrate that product quality can be manipulated by NH4+-N concentrations of the initial feeds.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Purificação da Água
/
Chlorella vulgaris
/
Biocombustíveis
/
Águas Residuárias
/
Amônia
/
Metano
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article