Ferrofluid-assisted rapid and directional harvesting of marine microalgal Chlorella sp. used for biodiesel production. (November 2017)

• Record Type: Journal Article
• Authors: Ho, Shih-Hsin; Chiu, Sheng-Yi; Kao, Chien-Ya; Chen, Tsai-Yu; Chang, Yu-Bin; Chang, Jo-Shu; Lin, Chih-Sheng
• Is Part Of: Bioresource technology. Volume 244:Part 2(2017)
• Page Start: 1337
• Page End: 1340
• Publication Date: 2017-11
• Subjects: Microalgal harvesting -- Ferrofluids -- Flow-through system -- Wastewater recycling -- Chlorella sp.; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.05.110
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: High harvesting efficiency of 95–100% was achieved within 1 min with a ferrofluid dosage of 25 mg L −1 . A simple and effective strategy for microalgal harvesting by ferrofluid was demonstrated. The harvesting efficiency reached over 80% after five recycles by the ferrofluid-harvesting system. The growth reached 80% after three recycles by the ferrofluid-harvesting system. Abstract: In this work, a novel harvesting strategy using ferrofluids coupled with flocculation as a magnetic directional harvesting system was developed, providing a fast and easy way to effectively collect microalgae with no further modifications made to the ferrofluids. With a ferrofluid dosage of 25 mg L −1, a high harvesting efficiency of 95–100% was achieved within 1 min. In addition, we successfully performed a wastewater recycling strategy coupled with a microalgal ferrofluid-harvesting dynamic flow-through system to harvest biomass of Chlorella sp. MTF-7 which could achieve over 80% of the maximum level after three repeated recycling cultivations. This work demonstrated the use of an integrated microalgal ferrofluid-harvesting dynamic flow-through system to develop a simple and effective strategy to enhance microalgal harvesting efficiency, along with wastewater recycling, in a marine microalgal Chlorella sp. MTF-7.