Natural plant extracts as an economical and ecofriendly alternative for harvesting microalgae

被引：51
作者：
Behera, Bunushree [1 ]
Balasubramanian, P. [1 ]
机构：
[1] Natl Inst Technol Rourkela, Dept Biotechnol & Med Engn, Agr & Environm Biotechnol Grp, Rourkela 769008, India
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 283卷
关键词：
Microalgae; Algal biofuel; Natural coagulants; Harvesting; Cost economics; LCA; FLOCCULATION METHODS; FERRIC-CHLORIDE; TURBIDITY; REMOVAL; COAGULANTS; MECHANISM; CHITOSAN; AGENT;
D O I：
10.1016/j.biortech.2019.03.070
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
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 (1-5 N) on coagulant extraction; coagulant dosage (1-5 g) and volume (20-100 ml); pH (6-12) and algal concentration (0.1-1 g 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 (8 mg ml(-1)) at pH 7.5-7.8, within 100 min. The harvesting efficiency increased to 95.76% when 4mgml(-1) M. oleifera extracts was combined with 0.75 mg 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.
引用
收藏
页码：45 / 52
页数：8
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