Flocculation Effect of Alkaline Electrolyzed Water (AEW) on Harvesting of Marine Microalga Tetraselmis sp SCIE SCOPUS KCI

Cited 3 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Flocculation Effect of Alkaline Electrolyzed Water (AEW) on Harvesting of Marine Microalga Tetraselmis sp
Author(s)
Lee, Su-Jin; Choi, Woo-Seok; Park, Gun-Hoo; Kim, Tae-Ho; Oh, Chulhong; Heo, Soo-Jin; Kang, Do-Hyung
KIOST Author(s)
Kim, Tae Ho(김태호)Oh, Chul Hong(오철홍)Heo, Soo Jin(허수진)Kang, Do Hyung(강도형)
Publication Year
2018-03
Abstract
Microalgae hold promise as a renewable energy source for the production of biofuel, as they can convert light energy into chemical energy through photosynthesis. However, cost-efficient harvest of microalgae remains a major challenge to commercial-scale algal biofuel production. We first investigated the potential of electrolytic water as a flocculant for harvesting Tetraselmis sp. Alkaline electrolyzed water (AEW) is produced at the cathode through water electrolysis. It contains mineral ions such as Na+, K+, Ca2+, and Mg2+ that can act as flocculants. The flocculation activity with AEW was evaluated via culture density, AEW concentration, medium pH, settling time, and ionic strength analyses. The flocculation efficiency was 88.7% at 20% AEW (pH 8, 10 min) with a biomass concentration of 2 g/l. The initial biomass concentration and medium pH had significant influences on the flocculation activity of AEW. A viability test of flocculated microalgal cells was conducted using Evans blue stain, and the cells appeared intact. Furthermore, the growth rate of Tetraselmis sp. in recycled flocculation medium was similar to the growth rate in fresh F/2 medium. Our results suggested that AEW flocculation could be a very useful and affordable methodology for fresh biomass harvesting with environmentally friendly easy operation in part of the algal biofuel production process.
ISSN
1017-7825
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1009
DOI
10.4014/jmb.1709.09040
Bibliographic Citation
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.28, no.3, pp.432 - 438, 2018
Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
Subject
BIODIESEL; ECONOMICS; RECOVERY; CHITOSAN; BIOMASS; PH
Keywords
Marine microalgae; harvesting; flocculation; alkaline electrolyzed water; Tetraselmis sp
Type
Article
Language
English
Document Type
Article
Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
Related Researcher
Research Interests

Microalgae Culture and Application,Aquaculture System Engineering,미세조류 배양 및 응용,배양시스템 엔지니어링,유용해양생물 배양 및 응용

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