Anaerobic ammonium oxidation (anammox) under realistic seasonal temperature variations: Characteristics of biogranules and process performance. (September 2015)

• Record Type: Journal Article
• Authors: Guo, Qiong; Xing, Bao-Shan; Li, Peng; Xu, Jia-Li; Yang, Chen-Chen; Jin, Ren-Cun
• Is Part Of: Bioresource technology. Volume 192(2015)
• Page Start: 765
• Page End: 773
• Publication Date: 2015-09
• Subjects: Anammox -- Granular sludge -- Nitrogen removal -- Seasonal temperature change; 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.2015.06.049
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The anammox performance was greatly affected by realistic seasonal temperatures. The reactor underwent a long process of recovery from psychrophilic stress. The properties of the anammox granules changed with temperature fluctuation. The links between anammox performance and sludge characteristics were revealed. Abstract: In this study, the effects of realistic seasonal temperatures on the nitrogen removal performance of anaerobic ammonium oxidation (anammox) and the properties of the anammox granules were comparatively investigated for 330 days. The results demonstrated that the nitrogen removal efficiency (NRE), nitrogen loading rate (NLR) and nitrogen removal rate (NRR) were decreased dramatically, as the temperature decreased from 31.2 to 2.5 °C. However, the nitrogen removal performance recovered andante as the temperature increased gradually. After low temperature exposure, the settleability tended to worsen, and granules appeared to be more irregular with a smaller average granule diameter, and the extracellular polymeric substances (EPS) content increased slightly, while the specific anammox activity (SAA) decreased obviously. This realistic seasonal temperatures based research was an illation of the actual operation, and could be potentially implemented to maintain stability for the application of anammox technology.