Novel insights into overcoming nitrite oxidation bacteria acclimatization problem in treatment of high-ammonia wastewater through partial nitrification. (September 2021)

• Record Type: Journal Article
• Authors: Jiang, Hao; Yang, Pei; Wang, Zhong; Ren, Shang; Qiu, Jingang; Liang, Haoran; Peng, Yongzhen; Li, Xiyao; Zhang, Qiong
• Is Part Of: Bioresource technology. Volume 336(2021)
• Publication Date: 2021-09
• Subjects: Free ammonia (FA) -- High-ammonia wastewater -- Hydroxylamine addition -- Nitrite oxidation bacteria (NOB) acclimatization -- Partial nitrification (PN); 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.2021.125254
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A new NOB adaptation type was observed in high-ammonia wastewater treatment. Nitrolancea can acclimatize to FA level up to 715.3 ± 47.3 mg NH3 -N/L. Hydroxylamine addition alleviated Nitrolancea -dominant NOB adaptation in short term. NOB acclimatization types were summarized based on specific NOB genera. Targeted measures could be taken to solve specific type of NOB acclimatization. Abstract: A partial nitrification sequencing batch reactor was operated to reveal mechanisms behind nitrite oxidation bacteria (NOB) acclimatization in high-ammonia wastewater treatment. The influent NH4 + -N increased stepwise from 499.7 ± 4.2 mg/L to 6994.5 ± 7.5 mg/L with initial free ammonia (FA) concentration rising from 37.9 ± 3.2 mg NH3 -N/L to 715.3 ± 47.3 mg NH3 -N/L, respectively. NOB acclimatized this FA range with NO3 – -N production increasing from 29.2 ± 2.6 mg/L to 144.1 ± 31.0 mg/L in a cycle, which was caused by the shift of dominant NOB genus from Nitrospira to Nitrolencea . Nitrosomonas as ammonia oxidation bacteria, could sustain its activity of 62.1 ± 0.1 mg NH4 + -N/(gVSS∙L∙h) under the same condition. Hydroxylamine addition could be implemented as an emergency measure to alleviate NOB acclimatization in short-term operation. The findings expanded knowledge about NOB acclimatization types and provided novel insights for addressing this problem in a targeted way.