FN Archimer Export Format
PT J
TI Control of the pH for marine microalgae polycultures: A key point for CO2 fixation improvement in intensive cultures
BT 
AF GALES, Amandine
   TRIPLET, Sebastien
   GEOFFROY, Thibault
   Roques, Cécile
   Carre, Claire
   LE FLOC'H, Emilie
   Lanfranchi, Mélissa
   SIMIER, Monique
   ROQUE D'ORBCASTEL, Emmanuelle
   PRZYBYLA, Cyrille
   FOUILLAND, Eric
AS 1:1,2;2:3;3:3;4:1;5:1;6:4;7:1,3;8:5;9:1;10:1;11:4;
FF 1:PDG-ODE-LITTORAL-LERLR;2:PDG-RBE-MARBEC-LSEA;3:PDG-RBE-MARBEC-LSEA;4:;5:;6:;7:;8:;9:PDG-ODE-LITTORAL-LERLR;10:PDG-RBE-MARBEC-LAAAS;11:;
C1 MARBEC, Univ Montpellier, IRD, CNRS, IFREMER, Montpellier, Sète & Palavas, France
   LBE, Univ Montpellier, INRA, Narbonne, France
   IFREMER L-SEA, Palavas, France
   MARBEC, Univ Montpellier, IRD, CNRS, IFREMER, Montpellier, Sète & Palavas, France
   MARBEC, Univ Montpellier, IRD, CNRS, IFREMER, Montpellier, Sète & Palavas, France
C2 IFREMER, FRANCE
   INRA, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
   IRD, FRANCE
SI SETE
   PALAVAS
SE PDG-ODE-LITTORAL-LERLR
   PDG-RBE-MARBEC-LSEA
   PDG-RBE-MARBEC-LAAAS
UM MARBEC
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-p187
IF 7.132
TC 26
UR https://archimer.ifremer.fr/doc/00612/72403/71392.pdf
LA English
DT Article
DE ;Carbon yield;Microalgal diversity;pH;Predators
AB Recently, CO2 recycling for the production of valuable microalgae has acquired substantial interest. Most studies investigating CO2 conversion efficiency in algal cultures were based on single species, although a stabilising effect of algal diversity on biomass production was recently highlighted. However, addition of CO2 into polyalgal cultures requires a careful control of pH; performance of CO2 conversion, growth and carbon biomass production are affected by pH differently, depending on the species of microalgae. This study investigates the efficiency of CO2 conversion by natural marine algal assemblage cultivated in open, land-based raceways (4.5 m3, 10 m2), working as high rate algal ponds (HRAP). Ponds were enriched with nitrogen and phosphate, pure CO2 was added and algal cultures were grown under three different fixed pH levels: pH 6, 7 and 8. The highest conversion of photosynthetically fixed CO2 into carbon biomass (40 %) was reached at pH 7, an intermediate level, due to the partial CO2 asphyxiation of algal predators (copepods, ciliates), while being under the suboptimal conditions for the development of marine amoebae. Under this pH, the theoretical maximal biological conversion of available CO2 into carbon biomass was estimated to be 60 % in naturally inoculated open ponds. 
PY 2020
PD MAY
SO Journal Of Co2 Utilization
SN 2212-9820
PU Elsevier
VL 38
UT 000531069900021
BP 187
EP 193
DI 10.1016/j.jcou.2020.01.019
ID 72403
ER

EF