Natural plant extracts as an economical and ecofriendly alternative for harvesting microalgae.
Bioresour Technol
; 283: 45-52, 2019 Jul.
Article
em En
| MEDLINE
| ID: mdl-30901587
ABSTRACT
The study investigated the ability of plant based natural coagulants from Azadirachta indica; Ficus indica; Moringa oleifera; Citrus sinensis; Punica granatum and Musa acuminata to harvest the microalgal biomass. Influence of eluent type (water and NaCl) and concentration (1-5â¯N) on coagulant extraction; coagulant dosage (1-5â¯g) and volume (20-100â¯ml); pH (6-12) and algal concentration (0.1-1â¯gâ¯l-1) on harvesting were analyzed. The results obtained were compared with alum and chitosan. FTIR and biochemical analysis confirmed the presence of bioactive compounds to aid coagulation. Biomass removal efficiency of 75.50% was obtained with M. oleifera extracts (8â¯mgâ¯ml-1) at pH 7.5-7.8, within 100â¯min. The harvesting efficiency increased to 95.76% when 4â¯mgâ¯ml-1M. oleifera extracts was combined with 0.75â¯mgâ¯ml-1 chitosan. The life cycle and cost analysis acknowledged the eco-friendly coagulants as strong alternative for conventional coagulants used in microalgal harvesting, thereby improvising the overall bioprocess.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Extratos Vegetais
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Moringa oleifera
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Azadirachta
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Microalgas
Tipo de estudo:
Health_economic_evaluation
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Índia