Impacts of sulfadiazine on the performance and membrane fouling of a hybrid moving bed biofilm reactor-membrane bioreactor system at different C/N ratios

Zhang, Xinbo; Zhang, Zumin; Liu, Ying; Ngo, Huu Hao; Guo, Wenshan; Wang, Huizhong; Zhang, Yufeng; Zhang, Dan

doi:10.1016/j.biortech.2020.124180

Cited by 29 publications

(4 citation statements)

References 31 publications

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“…In contrast, the membrane fouling rate in the MBRe was faster overall, reaching around 1.67 kPa/d from day 14 to day 28. The acceleration of membrane fouling caused by high pharmaceutical concentrations was consistent with a previous study [ 53 ], reporting that the addition of 90 μg/L carbamazepine to an MBR system increased the TMP after 1 day, which was attributed to the change in EPS concentrations and sludge deflocculation caused by activated sludge exposure to toxic chemicals. In this study, the observed reduction in floc size in the MBRe (mean value: 56.58 µm for MBRe vs. 76.15 µm for MBRc) could also aggravate membrane fouling, which is supported by previous studies showing that microbial physiological and ecological adjustments for self-protection against high levels of PPCPs are an important cause of membrane fouling [ 13 ].…”

Section: Resultssupporting

confidence: 91%

Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community

Huang

et al. 2023

Membranes

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Despite pharmaceuticals being widely detected in water-bodies worldwide, what remain unclear are the effects of high pharmaceutical concentrations on the treatment efficiency of biological wastewater treatment processes, such as membrane bioreactor (MBR) systems. This study investigated the efficiency of MBR technology in the treatment of synthetic wastewater containing a mixture of five typical pharmaceuticals (ofloxacin, sulfamethoxazole, sulfamethylthiadiazole, carbamazepine and naproxen) with a total concentration of 500 µg/L. Both the control MBR (MBRc) without pharmaceutical dosing and the MBR operated with high influent pharmaceutical concentrations (MBRe) were operated under room temperature with the same hydraulic retention time of 11 h and the same sludge retention time of 30 d. The removal efficiency rates of total nitrogen and total phosphorus were 83.2% vs. 90.1% and 72.6% vs. 57.8% in the MBRc vs. MBRe systems, and both MBRs achieved >98% removal of organics for a 180-day period. The floc size decreased, and membrane fouling became more severe in the MBRe system. Microbial diversity increased in the MBRe system and the relative abundances of functional microbe differed between the two MBRs. Furthermore, the total relative abundances of genes involved in glycolysis, assimilating nitrate reduction and nitrification processes increased in the MBRe system, which could account for the higher organics and nitrogen removal performance. This work provides insights for MBR operation in wastewater treatment with high pharmaceutical concentrations.

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Section: Resultssupporting

confidence: 91%

Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community

Huang

et al. 2023

Membranes

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“…To overcome the persistent toxicity and the high environmental mobility, various technologies for SAs removal have been reported, such as adsorption, advanced oxidation, photocatalysis, and biological methods [11][12][13][14]. Moreover, these methods are widely used in treating wastewater with sulfonamide antibiotics because these strategies are cost-effective, bio-friendly, and can be performed under mild reaction conditions [15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Comparative Growth Kinetics of Paenarthrobacter ureafaciens YL1 in the Biodegradation of Sulfonamide Antibiotics Based on Substituent Structures and Substrate Toxicity

Wang

Xin

et al. 2022

Fermentation

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The high consumption and emission of sulfonamide antibiotics (SAs) have a considerable threat to humans and ecosystems, so there is a need to develop safer and more effective methods than conventional strategies for the optimal removal of these compounds. In this study, four SAs with different substituents, sulfadiazine (SDZ), sulfamerazine (SMR), sulfamethoxazole (SMX), and sulfamethazine (SMZ) were removed by a pure culture of Paenarthrobacter ureafaciens YL1. The effect of the initial SAs concentration on the growth rate of strain YL1 was investigated. The results showed that the strain YL1 effectively removed various SAs in the concentration range of 0.05–2.4 mmol·L−1. The Haldane model was used to perform simulations of the experimental data, and the regression coefficient of the model indicated that the model had a good predictive ability. During SAs degradation, the maximum specific growth rate of strain YL1 was ranked as SMX > SDZ > SMR > SMZ with constants of 0.311, 0.304, 0.302, and 0.285 h−1, respectively. In addition, the biodegradation of sulfamethoxazole (SMX) with a five-membered substituent was the fastest, while the six-membered substituent of SMZ was the slowest based on the parameters of the kinetic equation. Also, density functional theory (DFT) calculations such as frontier molecular orbitals (FMOs), and molecular electrostatic potential map analysis were performed. It was evidenced that different substituents in SAs can affect the molecular orbital distribution and their stability, which led to the differences in the growth rate of strain YL1 and the degradation rate of SAs. Furthermore, the toxicity of P. ureafaciens is one of the crucial factors affecting the biodegradation rate: the more toxic the substrate and the degradation product are, the slower the microorganism grows. This study provides a theoretical basis for effective bioremediation using microorganisms in SAs-contaminated environments.

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“…The water samples were first filtered three times by coarse gauze primary sieving and fine gauze filtration to remove the large particle sizes and some of the sludge from the water samples. It was reported that the water quality of municipal sewage was complex and variable, and was influenced by the seasons 20 . The purpose of pretreatment was reducing the influence of suspended matter in water on the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…It was reported that the water quality of municipal sewage was complex and variable, and was influenced by the seasons. 20 The purpose of pretreatment was reducing the influence of suspended matter in water on the experiment.…”

Section: Sewage Pretreatmentmentioning

confidence: 99%

Efficient removal of imidacloprid from sewage by Scenedesmus sp. TXH and the effects of environmental factors on its removal

Yeerhazi

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND: With the rapid development of modern industry and agriculture, large amounts of sewage of various types are being discharged into water bodies every year, causing huge environmental pressure and posing a threat to organisms. Amongst different solutions to this problem, microalgae can remove pollutants including pesticides and antibiotics from water. In this work, an algal strain designated as Scenedesmus sp. TXH. was isolated from the Tangxun Lake Sewage Treatment Plant (Wuhan, China) and used to remove imidacloprid (IMI) from sewage. The removal efficiency, degradation products, removal of conventional contaminants [total dissolved nitrogen (TDN) ammonia nitrogen (NH 4 + -N), total dissolved phosphorus (TDP)], the biochemical response of the microalgae, and the effects of environmental factors such as light intensity and temperature were investigated. RESULTS:The results showed that: (i) the highest IMI removal efficiency of ≈60% was achieved under 80 ∼mol m −2 s −1 at 25 °C;(ii) the removal of NH 4 + -N, TDP and TDN in the sewage reached 90%, 90% and 65%, respectively; (iii) there was a significant linear relationship between the concentration of total chlorophyll and the removal of IMI in the sewage; and (iv) finally, based on the analysis of degradation products by mass spectrometer, three potential IMI degradation pathways were proposed.CONCLUSION: In summary, our results showed that Scenedesmus sp. TXH can remove IMI and conventional nutrients efficiently from sewage, implying a potential application in sewage treatment in the near future.

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Impacts of sulfadiazine on the performance and membrane fouling of a hybrid moving bed biofilm reactor-membrane bioreactor system at different C/N ratios

Cited by 29 publications

References 31 publications

Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community

Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community

Analysis of the Comparative Growth Kinetics of Paenarthrobacter ureafaciens YL1 in the Biodegradation of Sulfonamide Antibiotics Based on Substituent Structures and Substrate Toxicity

Efficient removal of imidacloprid from sewage by Scenedesmus sp. TXH and the effects of environmental factors on its removal

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