A novel strategy for simultaneous removal of nitrogen and organic matter using anaerobic granular sludge in anammox hybrid reactor. (December 2015)

• Record Type: Journal Article
• Authors: Tomar, Swati; Gupta, Sunil Kumar; Mishra, Brijesh Kumar
• Is Part Of: Bioresource technology. Volume 197(2015)
• Page Start: 171
• Page End: 177
• Publication Date: 2015-12
• Subjects: Anammox -- Organic matter -- Nitrogen removal -- Modelling -- Inhibition kinetics; 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.2015.08.057
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Addition of anaerobic granular sludge (1:5 v/v) enhanced bacterial tolerance to OM. Symbiosis of anammox and anaerobes resulted 96.8% NH4 -N and 94.8% COD removal. Haldane model successfully evaluated process inhibition in AHR. Inhibition modelling demonstrated COD as the major inhibitor to anammox process. The optimal removal of OM and nitrogen was observed at COD/N ratio of 0.54. Abstract: The coexistence of organic matter (OM) and nitrogen in industrial effluent is the major bottleneck in field-scale application of anammox process. The present study emphasized on investigating the role of seeding anaerobic granular sludge towards simultaneous removal of ammonium and OM in anammox hybrid reactor (AHR). The study delineated simultaneous reduction of both OM (94.8%) and nitrogen (96.8%) at optimal COD/N ratio (0.54). Pearson correlation matrix showed positive and strong correlation of ARE (ammonium removal efficiency) and CRE (COD removal efficiency) with NRE (nitrogen removal efficiency). The negative correlation of OLR and COD/TN ratio with NRE indicated that increase in organic loadings may suppress anammox activity. The process inhibition was evaluated using Haldane model considering free ammonia, OM and nitrite as inhibitors. The strategy of using anaerobic granular sludge not only augmented endurance of bacterial communities against OM inhibition but also facilitated simultaneous removal of OM and nitrogen.