Effects of operating conditions on microbial consortium of the heterotrophic ammonia oxidation process. (May 2021)

• Record Type: Journal Article
• Authors: Yin, Zhikai; Yang, Xiaolong; Wang, Xingyu; Wang, Shoubing
• Is Part Of: Bioresource technology. Volume 328(2021)
• Publication Date: 2021-05
• Subjects: Heterotrophic ammonia oxidation -- pH -- Temperature -- Heavy metals -- Microbial diversity; 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.2021.124823
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The AOB consortium exhibited strong acid- and alkali-resistance. Arrhenius-type correction coefficient detected the influence of temperature. FNA was more inhibition to nitrite-oxidizing than temperature drop. The consortium could survive in 0–1.0 mg·L -1 Cu 2+ and 0–5.0 mg·L -1 Fe 3+ . Nitrospirae, Nitrosomonas and Paracoccus was inhibited by temperature drop. Abstract: This study aimed to investigate the ammonia removal by the consortium mainly comprising of ammonia-oxidizing bacteria under different initial pH, temperatures and stress of heavy metals. The results showed that the consortium exhibited a strong adaptation for broad pH ranging from 5 to 9. When the temperature dropped to 15℃, its ammonium removal and nitrate accumulation rates decreased by 72.23% and 95.12%, respectively. Meanwhile, the temperature correction coefficients of the ammonium removal and nitrate accumulation rates reached the maximum. In addition, the consortium could survive in the solutions containing 0–1.0 mg·L -1 Cu 2+ and 0–5.0 mg·L -1 Fe 3+ . Moreover, the inhibition of free nitrous acid (FNA) against nitrite oxidation activity was found to be much more significant than that low-temperature treatment. Microbial diversity analysis showed that the bacterial community structure was shift significantly by the temperature drop, especially change the abundance of Nitrosomonas, Paracoccus, Pseudomonas and Nitrospirae .