Nitrite accumulation in continuous-flow partial autotrophic denitrification reactor using sulfide as electron donor. (November 2017)

• Record Type: Journal Article
• Authors: Liu, Chunshuang; Li, Wenfei; Li, Xuechen; Zhao, Dongfeng; Ma, Bin; Wang, Yongqiang; Liu, Fang; Lee, Duu-Jong
• Is Part Of: Bioresource technology. Volume 243(2017)
• Page Start: 1237
• Page End: 1240
• Publication Date: 2017-11
• Subjects: Elemental sulfur -- Nitrite -- Autotrophic denitrifier -- Partial denitrification; 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.2017.07.030
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Nitrite was accumulated in partial autotrophic denitrification by oxidizing sulfide. At S/N = 1:0.76 and HRT 6d, S 0 and NO2 − accumulation rates are 90% and 70%. Acrobacter, Azoarcus and Thauera are functional strains in the studied reactor. Produced nitrite was proposed to be used in a follow-up ANAMMOX reactor. Abstract: The nitrite accumulation in handling nitrate and sulfide-laden wastewater in a continuous-flow upflow anaerobic sludge blanket reactor was studied. At sulfide/nitrate-nitrogen ratio of 1:0.76 and loading rates of 1.2 kg-S m −3 d −1 and 0.4 kg-N m −3 d −1, the elemental sulfur and nitrite accumulation rates peaked at 90% and 70%, respectively, with Acrobacter, Azoarcus and Thauera presenting the functional strains in the studied reactor. The accumulated nitrite was proposed a promising feedstock for anaerobic ammonia oxidation process. An integrated partial autotrophic denitrification-anaerobic ammonia oxidation-aeration process for handling the ammonia and sulfide-laden wastewaters is proposed for further studies.