Effect of ammonium, electron donor and sulphate transient feeding conditions on sulphidogenesis in sequencing batch bioreactors. (March 2019)

• Record Type: Journal Article
• Authors: Reyes-Alvarado, Luis C.; Habouzit, Frédéric; Rene, Eldon R.; Santa-Catalina, Gaëlle; Escudie, Renaud; Bernet, Nicolas; Lens, Piet N.L.
• Is Part Of: Bioresource technology. Volume 276(2019)
• Page Start: 288
• Page End: 299
• Publication Date: 2019-03
• Subjects: Sulphate reduction -- Sulphidogenesis -- Wastewater treatment -- Sequencing batch reactor -- Transient feeding conditions -- Feast-famine; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.12.087
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Sulphidogenesis was optimal at 2.5 g SO4 2− ·L −1 and a COD:sulphate ratio of 2.4. Sulphidogenesis was robust to transient feeding conditions at 2.5 g SO4 2− ·L −1 . Sulphate RE was ≥40% at 15 g SO4 2− ·L −1 influent sulphate concentration. NH4 + feast-famine conditions affected the sulphate reduction process. Abstract: This work aimed to study the effect of transient feeding conditions on sulphidogenesis in 8 sequencing batch bioreactors (SBR). SBR L1 and H1, operated under steady-state conditions were used as the control reactors, while four SBR were tested under transient feeding conditions using moderate (L2 and L3, feast and famine: 2.5 and 0 g SO4 2− ·L −1 ) and high (H2 and H3, feast and famine: 15 and 0 g SO4 2− ·L −1 ) loads. The sulphate removal efficiency ( RE ) was ≥90% in SBR L2, L3 and H1. The NH4 + famine conditions resulted in a higher sulphate RE (≥40% H3) compared to feast conditions (≤20% H2). Besides, the sulphidogenic first-order kinetic constant was 4% larger and the use of electron donor was 16.6% more efficient under NH4 + famine conditions. Sulphidogenesis is robust to transient feeding conditions, but not when applying high loading rates (SBR H2 and H3).