Food waste hydrolysate as a carbon source to improve nitrogen removal performance of high ammonium and high salt wastewater in a sequencing batch reactor. (April 2022)

• Record Type: Journal Article
• Authors: Zhang, Mingjiang; Wang, Xiaomeng; Zhang, Dejin; Zhao, Guangliang; Zhou, Bo; Wang, Dianzhan; Wu, Zhenjiang; Yan, Cheng; Liang, Jianru; Zhou, Lixiang
• Is Part Of: Bioresource technology. Volume 349(2022)
• Publication Date: 2022-04
• Subjects: Food waste hydrolysate -- Carbon source -- Nitrogen removal -- High ammonium and high salt wastewater -- Sequencing batch reactor; 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.2022.126855
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: FWH was added to enhance N removal in HAHS wastewater treatment. Nitrogen removal efficiency increased by 21.5% after adding FWH. FWH provided enough biodegradable soluble substances under prolonged HRT condition. Adding FWH render a higher selectivity on functional species than using glucose. Abstract: The high ammonium and high salt (HAHS) wastewater generated from the anaerobic digestate of food waste is usually difficult to be treated by biological process because of its low C/N ratio. Herein, food waste hydrolysate (FWH) is rich in readily biodegradable organic matter, was utilized as carbon source to enhance the nitrogen removal of HAHS in the activated-sludge system. Results showed that compared with the control average total nitrogen removal efficiency increased from 73.4% to 94.9% and effluent declined from 281.4 mg/L to 53.9 mg/L by adding FWH at the C/N ratio of 6, satisfying the sewage discharge standard regulated by China. Besides, FWH utilization led to higher selectivity of the species responsible for nitrogen removal in related to glucose-adding group, which were dominated by Flavobacteriaceae, Melioribacteraceae, PHOS-HE36, and Rhodobacteraceae after a long-term operation. In general, FWH is an alternative carbon source to enhance nitrogen removal in HAHS wastewater treatment.