Effect of trace hydrazine addition on the functional bacterial community of a sequencing batch reactor performing completely autotrophic nitrogen removal over nitrite. (January 2015)

• Record Type: Journal Article
• Authors: Xiao, Pengying; Lu, Peili; Zhang, Daijun; Han, Xinkuan; Yang, Qingxiang
• Is Part Of: Bioresource technology. Volume 175(2015)
• Page Start: 216
• Page End: 223
• Publication Date: 2015-01
• Subjects: Completely autotrophic nitrogen removal over nitrite -- Aerobic ammonium oxidizing bacteria -- Anaerobic ammonium oxidizing -- N2H4; 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.2014.10.084
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: AOB population decreased under long-term trace N2 H4 addition. An AOB population increased under long-term trace N2 H4 addition. NOB suffered more significant inhibition from trace N2 H4 addition than AOB. Abstract: A sequencing batch reactor (SBR) was conducted to perform completely autotrophic nitrogen removal over nitrite (CANON). The effect of long-term trace N2 H4 addition on ammonium oxidizing bacteria (AOB) and anaerobic AOB (AnAOB) in the CANON system was investigated. AOB and AnAOB primarily related to Nitrosococcus, Nitrosomonas and Candidatus scalindua, respectively. Before and after trace N2 H4 addition, the estimates of AOB population decreased from 1.03 × 10 7 to 6.25 × 10 4 copies/g (dry sludge), but that of AnAOB increased from 3.14 × 10 9 to 5.86 × 10 10 copies/g (dry sludge). Despite there was a partially negative impact on AOB growth, the trace N2 H4 addition exerted a stronger inhibition on nitrite oxidizing bacteria (NOB) and promoted AnAOB growth, which improved the nitrogen removal of the CANON system. Sludge granules enriched under long-term trace N2 H4 addition were spherical and ellipsoidal, and the aerobic AOB were mainly located on the outer layers while AnAOB occupied most of the interior parts.