Open AccessConversion of Na HCO 3 to Na 2 CO 3 with a growth of Arthrospira platensis cells in 660 m 2 raceway ponds with a CO 2 bicarbonation absorber
Author(s) -
Guo Wangbiao,
Cheng Jun,
Ali Kubar Ameer,
Kumar Santosh,
Guo Caifeng
Publication year - 2020
Publication title -
microbial biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.287
H-Index - 74
ISSN - 1751-7915
DOI - 10.1111/1751-7915.13497
Subject(s) - arthrospira , photobioreactor , chemistry , sodium , nuclear chemistry , biomass (ecology) , analytical chemistry (journal) , cyanobacteria , chromatography , biology , bacteria , genetics , agronomy , organic chemistry
Summary The weight ratio of Na 2 CO 3 /Na HCO 3 was investigated in order to improve microalgal productivity in large‐scale industrial operations by converting Na HCO 3 to Na 2 CO 3 with a growth of Arthrospira platensis cells in 660 m 2 raceway ponds. Two microalgal cultivation systems with a Na HCO 3 by‐product ( SPBP ) and a CO 2 bicarbonation absorber ( CBAP ) were firstly thoroughly introduced. There was a 13.3% decrease in the initial weight ratio of Na 2 CO 3 /Na HCO 3 resulting in a 25.3% increase in the biomass growth rate with CBAP , compared to that of SPBP . Increased sunlight intensity, solution temperature and pH all resulted in both a higher HCO 3 - absorbance and CO 3 2 -release, thereby increasing the weight ratio of Na 2 CO 3 /Na HCO 3 during the growth of A. platensis . The biomass growth rate was peaked at 39.9 g m −2 day −1 when the weight ratio of Na 2 CO 3 /Na HCO 3 was 3.7. Correspondingly, the cell pigments (chlorophyll a and carotenoid) and trichome size (helix pitch and trichome length) reached to a maximum state of 8.47 mg l −1 , 762 μg l −1 , 57 and 613 μm under the CBAP system.