Simultaneous removal of heterocyclic drugs and total nitrogen from biochemical tailwater by peracetic acid/cobalt-loaded ceramsite-based denitrification biofilter

Li, Tong; Jin, Lili; Zhu, Suhua; Zhang, Xuxiang; Ren, Hongqiang; Huang, Hui

doi:10.1016/j.envpol.2022.120279

Cited by 3 publications

(4 citation statements)

References 40 publications

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“…A lab-scale experiment was designed to simulate an advanced treatment of EPs in engineering practice and verify the reliability of the conclusions. Currently, biofilter coupling with an advanced oxidation system involving peracetic acid (PAA) under the activation of transition-metal conditions has been extensively studied and applied; − thus, this process was selected for lab-scale verification, with the configuration and operation parameters based on our previous study . Four lab-scale denitrification biofilters (DNBFs) with an effective volume of 1.65 L were employed (Figure S2).…”

Section: Methodsmentioning

confidence: 99%

“…Four lab-scale denitrification biofilters (DNBFs) with an effective volume of 1.65 L were employed (Figure S2). The control group was only added with ordinary ceramsite while the experimental groups were added with 3% cobalt-loaded ceramsite and different PAA concentrations, notably, dissolved Co 2+ concentration-activated PAA; however, it exhibited nonsignificant toxic inhibition on the biofilm community . The synthetic wastewater was continuously loaded into the DNBF in an up-flow pattern.…”

Section: Methodsmentioning

confidence: 99%

“…Currently, biofilter coupling with an advanced oxidation system involving peracetic acid (PAA) under the activation of transition-metal conditions has been extensively studied and applied; 30−32 thus, this process was selected for lab-scale verification, with the configuration and operation parameters based on our previous study. 32 Four lab-scale denitrification biofilters (DNBFs) with an effective volume of 1.65 L were employed (Figure S2). The control group was only added with ordinary ceramsite while the experimental groups were added with 3% cobalt-loaded ceramsite and different PAA concentrations, notably, dissolved Co 2+ concentration-activated PAA; however, it exhibited nonsignificant toxic inhibition on the biofilm community.…”

Section: Lab-scale Biofilter Verificationmentioning

confidence: 99%

“…The control group was only added with ordinary ceramsite while the experimental groups were added with 3% cobalt-loaded ceramsite and different PAA concentrations, notably, dissolved Co 2+ concentration-activated PAA; however, it exhibited nonsignificant toxic inhibition on the biofilm community. 32 The synthetic wastewater was continuously loaded into the DNBF in an up-flow pattern. For selecting the tested EPs, CBZ is often used independently in medicinal applications while SMX is often used simultaneously or in combination with sulfadiazine (SDZ) and trimethoprim (TMP), which are found together in wastewater as a series of pollutants.…”

Section: Lab-scale Biofilter Verificationmentioning

confidence: 99%

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Adaptive Evolution Laws of Biofilm under Emerging Pollutant-Induced Stress: Community Assembly-Driven Structure Response

Kong

Jin

Zhao

et al. 2023

Environ. Sci. Technol.

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The widely used biofilm process in advanced wastewater treatment is currently challenged by numerous exotic emerging pollutants (EPs), and the underlying principle of the challenge is the adaptive evolution laws of biofilm under EP stress. However, there is still a knowledge gap in exploration of the biofilm adaptive evolution theory. Herein, we comprehensively analyzed the morphological variation, community succession, and assembly mechanism of biofilms to report the mechanism underlying their adaptive evolution under sulfamethoxazole and carbamazepine stress for the first time. The ecological role of the dominant species was driven as a pioneer and assembly hub by EP stress, and the deterministic processes indicated the functional basis of the transformation. In addition, the characteristic responses of dispersal limitation and homogenizing dispersal adequately revealed the assembly pathways in adaptive evolution and the resulting structural variation. Therefore, the "interfacial exposure−structural variation−mass transfer feedback" mechanism was inferred to underly the adaptive evolution process of biofilms. Overall, this study highlighted the internal drivers of the adaptive evolution of the biofilm at the phylogenetic level and deepened our understanding of the mechanism of biofilm development under EP stress in advanced wastewater purification.

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