Insight into anammox granular system operation in wet/dry weather

Wenqiang Wang; Wenjuan Wang; Zhu Li; Jiguang Deng; Dong Li; Jie Zhang

doi:10.1016/j.biortech.2024.130419

Insight into anammox granular system operation in wet/dry weather

Bioresour Technol. 2024 Mar:396:130419. doi: 10.1016/j.biortech.2024.130419. Epub 2024 Feb 5.

Authors

Wenqiang Wang¹, Wenjuan Wang², Zhu Li³, Jiguang Deng⁴, Dong Li⁵, Jie Zhang⁶

Affiliations

¹ Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China; Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
² Department of Pharmacy, Peking University Cancer Hospital and Institute, Beijing 100142, China.
³ Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
⁴ Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
⁵ Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China. Electronic address: lidong2006@bjut.edu.cn.
⁶ Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.

PMID: 38325610
DOI: 10.1016/j.biortech.2024.130419

Abstract

Effects of short hydraulic retention time (HRT) in wet weather and long HRT in dry weather on sludge properties, microbial community, and metabolomic of anammox granular system were studied. Results showed under equal nitrogen loading rate (0.4 kg N/(m³ · d)) conditions, an HRT of 4.41 h was beneficial for total nitrogen removal efficiency (78.9 %). The shorter the HRT, the lower the particle density (1.01±0.34 g/cm³), the lower the settling performance (1.18±0.28 cm/s), and the worse the biomass retention (1.04±0.18 g/L), but the higher the mechanical strength (85.22 Pa). Properly decreasing HRT could increase the permeability of anammox granules, ensuring their activity. Metabolomics analysis indicated that the activity of anaerobic ammonium oxidizing bacteria was promoted by stimulating the metabolic pathways of amino acids and glycerophospholipids. In summary, this research clarified the effect of wet/dry weather on anammox granular system and provided theoretical guidance for the application in engineering.

Keywords: Hydraulic retention time; Mechanical strength; Metabolomics; Microbial community; Nitrogen removal.

MeSH terms

Ammonium Compounds* / metabolism
Anaerobic Ammonia Oxidation*
Anaerobiosis
Bacteria, Anaerobic / metabolism
Bioreactors / microbiology
Nitrogen / metabolism
Oxidation-Reduction
Sewage / microbiology
Weather

Substances

Sewage
Ammonium Compounds
Nitrogen