Microbial nitrate reduction in a highly alkaline environment containing solid cement paste

Author(s): Nadège Durban, Pierre Albina, Alexandra Bertron, Achim Albrecht, Jean-Charles Robinet and Benjamin Erable
Paper category: Proceedings
Book title: Proceedings of the Final Conference of RILEM 253-MCI Microorganisms-Cementitious Materials Interactions Volume I
Editor(s): Alexandra Bertron and Henk Jonkers
ISBN: 978-2-35158-207-7 (Set)
ISBN: 978-2-35158-209-1 (Volume1)
e-ISBN: 978-2-35158-206-0
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 277-286
Total Pages: 288
Language : English

Abstract: This study investigates nitrate and nitrite reduction in a cementitious environment containing hardened cement paste catalysed by biomass from activated sludge and the possible interactions of the cement paste surface with the microorganisms. The nitrate was reduced at pH around of 11.5 whereas the nitrite reduction occurred mainly when pH was maintained below 10.5. The biological activities near or on the cement surface promoted calcite precipitation in association with organic matters oxidation coupled to nitrate reduction. Some of the biomass were anchored to the cement paste surface.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00