Short term performance and microbial community of a sulfide-based denitrification and Anammox coupling system at different N/S ratios. (December 2019)

• Record Type: Journal Article
• Authors: Qin, Yujie; Wu, Chenglong; Chen, Buqing; Ren, Junyi; Chen, Linyi
• Is Part Of: Bioresource technology. Volume 294(2019)
• Publication Date: 2019-12
• Subjects: Anammox -- Sulfide-dependent autotrophic denitrification -- Nitrogen removal -- Sulfide removal -- Microbial community; 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.2019.122130
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A novel SDAD-Anammox process was developed for nitrogen and sulfide removal. Short term effects of different N/S ratios on SDAD-Anammox activity was obvious. The best TN removal efficiency was 82.8% at a N/S ratio of 2.38. Denitrification contributed to N loss improved with the N/S ratios decreased. Candidatus Kuenenia and Thiobacillius became dominated when nitrate was limited. Abstract: A novel sulfide-based denitrification and Anammox process was established for simultaneous removal of nitrogen and sulfide in a UBF reactor. The effects of the N/S ratio on reactor performance were investigated under five N/S molar ratios (4.56, 2.38, 0.96, 0.73, and 0.51). The best total nitrogen removal efficiency was 82.8% at a N/S ratio of 2.38. When the N/S ratio exceeded 0.96, Anammox contributed to more than 90% of the N loss. Sulfide was completely removed during the full operational period and S 0 accumulation occurred when N/S ratio was less than 1. Thiobacillus (6.1%) and Candidatus Kuenenia (18.8%) were the main functional microorganisms when nitrate was in excess on day 12. As nitrate became limited on day 50, Thiobacillus (21.0%), Sulfurimonas (3.9%), and Candidatus Kuenenia (19.7%) became dominated. In this study, Candidatus Kuenenia was not inhibited by the sulfide.