BioChem - DOS

Dark fermentative hydrogen production by anaerobic sludge growing on glucose and ammonium resulting from nitrate electroreduction

International journal of hydrogen energy

Abdallah, R.; Djelal, H.; Amrane, A.; Sayed, W.; Fourcade, F.; Labasque, T.; Geneste, F.; Taha, S.; Floner, D.

The main objective of this work was to study the feasibility of biohydrogen production by heat-treated anaerobic sludge with glucose as carbon substrate and ammonium as nitrogen source, obtained from the electrochemical reduction of concentrated nitrate solutions (3 g L<SUP>-1</SUP>NO<SUB>3</SUB><SUP>-</SUP>), namely model solutions simulating those obtained after physicochemical denitrification of industrial wastewaters. Experiments were realized in bacth systems involving 125 mL (without pH control) and 3 L (with pH control) reactor, respectively. In order to find the optimal conditions for H<SUB>2</SUB> production, the first set of experiments were conducted without pH control at various initial pH (pH 5.5, 6.5 and 7.5) and glucose concentrations (5-30 g L<SUP>-1</SUP>); and the highest H<SUB>2</SUB> yield (1.1 mol H<SUB>2</SUB>mol<SUP>-1</SUP><SUB>glucoseconsumed</SUB>) was reached for a glucose concentration of 25 g L<SUP>-1</SUP> and at pH 6.5. These optimal conditions were then considered to examine the effect of pH control on biohydrogen production, in a 3 L bioreactor. The pH control allowed a considerable improvement of the hydrogen gas conversion efficiency, which reached 2.02 mol H<SUB>2</SUB>mol<SUP>-1</SUP><SUB>glucoseconsumed</SUB>.

2016

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

41

12

pp.5445-5455

10.1016/j.ijhydene.2016.02.030

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART75091038

https://hal-insu.archives-ouvertes.fr/insu-01287692/file/Dark%20fermentative%20hydrogen%20production_accepted.pdf

Nitrate electroreduction; Ammonium; Anaerobic activated sludge; Dark fermentative hydrogen production; Combined process