Deciphering the fate of osmotic stress priming on enhanced microorganism acclimation for purified terephthalic acid wastewater treatment with high salinity and organic load. (April 2023)

• Record Type: Journal Article
• Authors: Ma, Xiao-chen; Wang, Ke; Gao, Xin-lei; Li, Xiang-kun; Liu, Gai-ge; Chen, Hong-ying; Piao, Chen-yu; You, Shi-jie
• Is Part Of: Bioresource technology. Volume 374(2023)
• Publication Date: 2023-04
• Subjects: Osmotic stress priming -- Halotolerant gene -- Terephthalate -- Salt-tolerant microorganism acclimation -- Saline wastewater; 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.2023.128656
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Osmotic stress priming was elaborated the overpowering benefit on direct priming. The salt environment mitigates the impact of organic loads. Terephthalic acid is susceptible to salinity and organic loading. Salinity causes degradation of toluate via terephthalate pathway. Salt-tolerance genes differ in different salinity and organic load . Abstract: Osmotic stress priming (OSP) was an effective management strategy for improving microbial acclimation to salt stress. In this study, the interaction between pollutants and microbiota, and microbial osmoregulation were investigated triggered by OSP (alternately increasing salinity and organic loading). Results showed that OSP significantly improved COD removal from 31.53 % to 67.99 % and mitigated the terephthalate inhibition produced by toluate, decreasing from 1908.08 mg/L to 837.16 mg/L compared with direct priming. Due to an increase in salinity, Pelotomaculum and Mesotoga were enriched to facilitate terephthalate degradation and syntrophic acetate oxidation (SAO). And organic load promoted acetate formation through syntrophic metabolism of Syntrophorhabdus / Pelotomaculum and SAO-dependent hydrogenotrophic methanogenesis. K + absorbing, proline and trehalose synthesis participated in osmoregulation at 0.5 % salinity, while only ectoine alleviated intracellular osmolarity under 1.0 % salinity with OLR of 0.44 kg COD /m 3 . This study provided in-depth insight for microbial acclimation process of anaerobic priming of saline wastewater.