School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
Bioresour Technol. 2023 Jul;379:129043. doi: 10.1016/j.biortech.2023.129043. Epub 2023 Apr 10.
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.
一体式固定膜生物反应器（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 对苯胺的响应机制仍需进一步研究。本研究采用连续流（CF-IFAS）和批式（B-IFAS）两种模式建立 IFAS，考察其对苯胺的去除效能。在不同的胁迫强度下，苯胺的去除效率均超过 99%。在低胁迫强度（苯胺≈200mg/L）下，B-IFAS 的总氮去除效率比 CF-IFAS 高约 37.76%。当胁迫强度增加（苯胺≥400mg/L）时，两者均超过 82%。CF-IFAS 受到反硝化的抑制，而 B-IFAS 中的硝化作用不受影响。B-IFAS 的扰动遗留效应使微生物群落迅速达到新的稳定状态。B-IFAS 中种间关系更紧密，关键物种更多：Leucobacter、Rhodococcus、Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium、Ellin6067 和 norank_f_NS9_marine_group。代谢和细胞生长与死亡是最丰富的代谢途径，这使得两种系统在高胁迫强度下均具有优异的污染物去除和稳定性。
