Effects of high-concentration influent suspended solids on aerobic granulation in sequencing batch reactors treating real textile wastewater

Lin, Jianrui; He, Hangtian; Zou, Jinte; Yang, Yongyuan; Li, Jun

doi:10.1016/j.jwpe.2023.104609

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…Overall, this is consistent with the high TN removal rate observed in R-PVDF. Additionally, the abundance of Firmicutes in PVDF-based reactors (7.7% and 5.5%) was higher than in PTFE-based reactors (2.9% and 1.9%), reflecting their better ability to degrade complex and recalcitrant organic matter and endure extreme conditions [36][37][38]. Moreover, the proportion of Nitrospirae in reactor 2-3 (4.7%) was significantly higher than in the other reactors, indicating the potential to remove NH 4 + -N later.…”

Section: Sample Idmentioning

confidence: 99%

Surface Modification of PVDF and PTFE Hollow Fiber Membranes for Enhanced Nitrogen Removal in a Membrane-Aerated Biofilm Reactor

Zai,

Chen,

Qin

et al. 2024

Water

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Microporous membranes such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) often exhibit suboptimal hydrophilicity and microbial adhesion, which impede effective nitrogen removal in membrane-aerated biofilm reactors (MABRs), particularly during initial operational phases. To address this issue, the present study introduced acrylic acid (AA) following plasma treatment (P) to enhance membrane performance, thereby engineering a novel composite material optimized for MABR applications. Four MABRs—Reactor with pristine PVDF membrane (R-PVDF), Reactor with composite PVDF membrane (R-PVDF-P-AA), Reactor with pristine PTFE membrane (R-PTFE), and Reactor with composite PTFE membrane (R-PTFE-P-AA)—were evaluated. The modified membranes displayed enhanced roughness and hydrophilicity, which improved biocompatibility and variably increased the oxygen transfer efficiency. Notably, the R-PVDF-P-AA configuration showed a significant enhancement in the removal rates of NH4+-N and total nitrogen (TN), achieving 78.5% and 61.3%, respectively, which was markedly higher than those observed with the original membranes. In contrast, the modified R-PTFE-P-AA exhibited lower removal efficiencies, with NH4+-N and TN reductions of approximately 60.0% and 49.5%. Detailed microbial community analysis revealed that the R-PVDF-P-AA membrane supported robust commensalism between ammonia-oxidizing and denitrifying bacteria, underpinning the improved performance. These findings highlight the critical role of surface chemistry and microbial ecology in optimizing the function of MABRs.

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Section: Sample Idmentioning

confidence: 99%