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Integrated fixed-film activated sludge systems in continuous-flow and batch mode acclimated from low to high aniline concentrations: Performance, mechanism and metabolic pathways
Bioresource Technology ( IF 9.7 ) Pub Date : 2023-04-10 , DOI: 10.1016/j.biortech.2023.129043
Nan-Ping Wu 1 , Qian Zhang 1 , Bin Tan 2 , Meng Li 1 , Bing Lin 1 , Jing He 1 , Jun-Hao Su 1 , Hao-Nan Shen 1
Affiliation  

Integrated fixed-film activated sludge (IFAS) system has considerable advantages in treating aniline wastewater economically and efficiently. However, the response mechanism of IFAS to aniline needs further study. Herein, IFAS in continuous-flow (CF-IFAS) and batch mode (B-IFAS) were set up to investigate it. The removal efficiency of aniline exceeded 99% under different stress intensities. At low stress intensity (aniline ≈ 200 mg/L), the total nitrogen removal efficiency of B-IFAS was approximately 37.76% higher than CF-IFAS. When the stress intensity increased (aniline ≥ 400 mg/L), both were over 82%. CF-IFAS was restrained by denitrification while nitrification in B-IFAS. The legacy effect of perturbation of B-IFAS made microflora quickly reach new stability. The closer interspecific relationship in B-IFAS and more key species: Leucobacter, Rhodococcus, Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Ellin6067 and norank_f_NS9_marine_group. Metabolic and Cell growth and death were the most abundant metabolic pathways, resulting both systems the excellent pollutant removal and stability under high stress intensity.

中文翻译:


连续流和分批模式的集成固定膜活性污泥系统,适应从低浓度到高苯胺浓度:性能、机制和代谢途径



集成固定膜活性污泥 (IFAS) 系统在经济高效地处理苯胺废水方面具有相当大的优势。然而,IFAS 对苯胺的反应机制需要进一步研究。在此,建立了连续流 (CF-IFAS) 和批处理模式 (B-IFAS) 的 IFAS 来研究它。苯胺在不同应力强度下的去除效率均超过 99%。在低胁迫强度 (苯胺≈ 200 mg/L) 下,B-IFAS 的总脱氮效率比 CF-IFAS 高约 37.76%。当胁迫强度增加时(苯胺≥ 400 mg/L),两者均超过 82%。CF-IFAS 受反硝化作用抑制,而 B-IFAS 受硝化作用抑制。B-IFAS 扰动的遗留效应使微生物群落迅速达到新的稳定性。B-IFAS 和更多关键物种的种间关系更密切:白杆菌、红球菌、异根瘤菌-新根瘤菌-副根瘤菌-根瘤菌、Ellin6067 和 norank_f_NS9_marine_group。代谢和细胞生长和死亡是最丰富的代谢途径,使这两个系统在高胁迫强度下具有优异的污染物去除和稳定性。
更新日期:2023-04-10
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