A novel cross-flow honeycomb bionic carrier promotes simultaneous nitrification, denitrification and phosphorus removal in IFAS system: Performance, mechanism and keystone species

Wu, Tong; Ding, Jie; Yang, Shanshan; Zhong, Le; Liu, Bingfeng; Xie, Guo-Jun; Fan, Yang; Pang, Ji-Wei; Ren, Nan-Qi

doi:10.1016/j.watres.2022.119132

Cited by 37 publications

(4 citation statements)

References 56 publications

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“…Figure 2B shows that Proteobacteria, a phylum containing many functional N- and P-removing genera ( Wu et al, 2022 ), was the most abundant in all biofilm samples (35.68–47.36%). The second most abundant phylum was Bacteroidota (17.44–23.47%), an common marine bacteria, which play an essential role in the degradation of organics, followed by Chloroflexi (11.21–21.26%).…”

Section: Resultsmentioning

confidence: 99%

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Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system

Zhong

Pang³

et al. 2023

Front. Microbiol.

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In this study, the influence of Fe3+ on N removal, microbial assembly, and species interactions in a biofilm system was determined. The results showed that maximum efficiencies of ammonia nitrogen (NH4+-N), total nitrogen (TN), phosphorus (P), and chemical oxygen demand (COD) removal were achieved using 10 mg/L Fe3+, reaching values of 100, 78.85, 100, and 95.8%, respectively, whereas at concentrations of 15 and 30 mg/L Fe3+ suppressed the removal of NH4+-N, TN, and COD. In terms of absolute abundance, the expression of bacterial amoA, narG, nirK, and napA was maximal in the presence of 10 mg/L Fe3+ (9.18 × 105, 8.58 × 108, 1.09 × 108, and 1.07 × 109 copies/g dry weight, respectively). Irrespective of Fe3+ concentrations, the P removal efficiency remained at almost 100%. Candidatus_Competibacter (10.26–23.32%) was identified as the most abundant bacterial genus within the system. Determinism (50%) and stochasticity (50%) contributed equally to microbial community assembly. Co-occurrence network analysis revealed that in the presence of Fe3+, 60.94% of OTUs in the biofilm system exhibited positive interactions, whereas 39.06% exhibited negative interactions. Within the OTU-based co-occurrence network, fourteen species were identified as key microbes. The stability of the system was found to be predominantly shaped by microbial cooperation, complemented by competition for resources or niche incompatibility. The results of this study suggested that during chemical P removal in wastewater treatment plants using biofilm methods, the concentration of supplemental Fe3+ should be maintained at 10 mg/L, which would not only contribute to P elimination, but also enhance N and COD removal.

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Section: Resultsmentioning

confidence: 99%

“…The primers and specific amplification and sequencing steps were consistent with those described by Zhong et al (2023) . Functional genes were quantified based on fluorescence quantitative PCR using previously described primers ( Wu et al, 2022 ) and the qPCR procedure described by Zhou et al (2022) .…”

Section: Methodsmentioning

confidence: 99%

Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system

Zhong

Pang³

et al. 2023

Front. Microbiol.

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“…Integrated fixed-film activated sludge (IFAS) process via integrating the suspended and the attached growth approaches provides considerable aerobic and anoxic zones in a single column bioreactor [ 18 ]. IFAS systems with co-existence of both autotrophic and heterotrophic bacteria in suspended and attached biomass have caught the attention of researchers owing to promoting organic carbon and nitrogen removal, mitigating footprint, maximizing working volume of bioreactor, and improving hydraulic shock resistance [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Development and modeling of an integrated fixed-film activated sludge (IFAS) system for simultaneous nitrogen and carbon removal from an industrial estate wastewater

Dolatshah,

Asadi,

Gholami

et al. 2024

Biotechnology Reports

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“…The integrated fixed-film activated sludge (IFAS) is a hybrid suspended growth-fixed film system extensively utilized in domestic and industrial wastewater to meet stringent effluent quality standards [ 9 , 14 , 15 ]. The IFAS removes dissolved organics from the wastewater and ensures complete nitrification–denitrification [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Operating Parameters on the Performance of Integrated Fixed-Film Activated Sludge for Wastewater Treatment

Waqas,

Harun,

Sambudi

et al. 2023

Membranes

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Integrated fixed-film activated sludge (IFAS) is a hybrid wastewater treatment process that combines suspended and attached growth. The current review provides an overview of the effect of operating parameters on the performance of IFAS and their implications for wastewater treatment. The operating parameters examined include hydraulic retention time (HRT), solids retention time (SRT), dissolved oxygen (DO) levels, temperature, nutrient loading rates, and aeration. Proper control and optimization of these parameters significantly enhance the treatment efficiency and pollutant removal. Longer HRT and appropriate SRT contribute to improved organic matter and nutrient removal. DO levels promote the growth of aerobic microorganisms, leading to enhanced organic matter degradation. Temperature influences microbial activity and enzymatic reactions, impacting treatment efficiency. Nutrient loading rates must be carefully managed to avoid system overload or inhibition. Effective aeration ensures uniform distribution of wastewater and biofilm carriers, optimizing contact between microorganisms and pollutants. IFAS has been used in water reuse applications, providing a sustainable and reliable water source for non-potable uses. Overall, IFAS has proven to be an effective and efficient treatment process that can provide high-quality effluent suitable for discharge or reuse. Understanding the effects of these operating parameters helps to optimize the design and operation for efficient wastewater treatment. Further research is needed to explore the interactions between different parameters, evaluate their impact under varying wastewater characteristics, and develop advanced control strategies for improved performance and sustainability.

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A novel cross-flow honeycomb bionic carrier promotes simultaneous nitrification, denitrification and phosphorus removal in IFAS system: Performance, mechanism and keystone species

Cited by 37 publications

References 56 publications

Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system

Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system

Development and modeling of an integrated fixed-film activated sludge (IFAS) system for simultaneous nitrogen and carbon removal from an industrial estate wastewater

Effect of Operating Parameters on the Performance of Integrated Fixed-Film Activated Sludge for Wastewater Treatment

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