Water Environment Research, Год журнала: 2024, Номер 96(6)

Опубликована: Июнь 1, 2024

Abstract Nitrate poses a potential threat to aquatic ecosystems. This study focuses on the sulfur autotrophic denitrification mechanism in process of water culture wastewater treatment, which has been successfully applied degradation nitrogen farm effluents. However, coexistence organic acids treatment is common environmental challenge, significantly affecting activity denitrifying bacteria. paper aims explore effects adding benzoic acid and lactic performance, removal rate, microbial population abundance systems under optimal operating conditions, deficiency, high hydraulic load. In experiments with 50 mg·L −1 or alone, results show that have stimulating effect activity, greater than inhibitory effect. Under average rate system remained above 99%; S/N = 1.5 increased from 88.34% 91.93% 85.91%; HRT 6 h 75.25% 97.79% 96.58%. addition, addition led decrease abundance. At phylum level, Proteobacteria always dominant bacterial genus, its relative after acid, 40.2% 61.5% 62.4%. genus Thiobacillus , Sulfurimonas Chryseobacterium Thermomonas maintained abundances different conditions. Practitioner Points Employing for treating high‐nitrate wastewater. Utilizing as external carbon sources. Denitrifying bacteria demonstrate utilization efficiency towards acids. Organic promote more they inhibit it. The promotion manifested enhancement

Язык: Английский