Investigating the biological degradation of the drug β-blocker atenolol from wastewater using the SBR

Rezaei, Reza; Aghapour, Ali Ahmad; Khorsandi, Hassan

doi:10.1007/s10532-022-09979-w

Cited by 12 publications

(30 citation statements)

References 46 publications

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“…Different methods have been studied to remove TCP from water and wastewater (Gaya et al, 2010;Joseph et al, 2011;Ding et al, 2016;Olu-Owolabi et al, 2017;Liang et al, 2022). To degrade and remove TCP from aquatic environments, it is necessary to use efficient, economical, and environmentally friendly treatment methods such as biological treatment processes (Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Azubuike et al, 2016;Salgot et al, 2016;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). In biological processes, biomass can acclimate and degrade organic compounds due to the production of different enzymes (Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b).…”

Section: Introductionmentioning

confidence: 99%

“…To degrade and remove TCP from aquatic environments, it is necessary to use efficient, economical, and environmentally friendly treatment methods such as biological treatment processes (Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Azubuike et al, 2016;Salgot et al, 2016;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). In biological processes, biomass can acclimate and degrade organic compounds due to the production of different enzymes (Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). Compared to other ways, biological processes require less cost, more straightforward operation, and better and more reliable performance (El-Naas et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…So, the study with stabilized microbial species shows that sequential anaerobicaerobic processes effectively degrade TCP (Gardin et al, 2001). The SBR with a combined anaerobic-aerobic operation process is also considered a suitable decomposition process for removing industrially resistant compounds such as chlorinated aromatic compounds (Chan et al, 2009;Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). Due to the high toxicity of 2-4-6 Trichlorophenol, it is necessary to conduct additional studies on the biodegradation of this compound.…”

Section: Introductionmentioning

confidence: 99%

“…Given the high rate of aerobic reactions and the high ability of aerobic processes to biodegrade aromatic compounds, these processes are usually superior to anaerobic processes (Aghapour et al, 2013a;Aghapour et al, 2013b;Pantea et al, 2013;Metcalf et al, 2014;Aghapour et al, 2015;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). Therefore, combining anaerobic-aerobic processes for dehalogenation and biodegradation of TCP can be more effective than separate aerobic and anaerobic processes.…”

Section: Introductionmentioning

confidence: 99%

“…SBR is one of the most important and usable processes in treating industrial wastewater containing toxic and degradable compounds (Metcalf et al, 1991;Aghapour et al, 2013a;Aghapour et al, 2013b;Aghapour et al, 2015;Khorsandi et al, 2018;Khorsandi et al, 2020;Rezaei et al, 2022b). The operation of SBR includes four phases of feeding, reaction, settling, and decant, and it is possible to operate it as a combined anaerobic-aerobic in its reaction phase (Metcalf et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Ghochlavi

Aghapour²

2022

Front. Environ. Sci.

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2-4-6 Trichlorophenol (TCP) is toxic, carcinogenic, and resistant to biodegradation. In this study, a rotating biological bed (RBB) was used to improve the efficiency of Sequencing batch reactors (SBR), and it was operated in sequential anaerobic and aerobic conditions. Biofilm growth on media of rotating biological bed was also confirmed using Scanning Electron Microscope (SEM). In this study, the effect of 2-4-6 trichlorophenol concentration (5–430 mg/L), hydraulic retention time (HRT) (12–30 h), the number of operating cycles per day (6–12 cycles/d), the type of combination of anaerobic and aerobic processes and the presence of a rotating biological bed and its rotation were studied. SBR equipped with a rotating biological bed (SBR-RBB) with the sequential anaerobic-aerobic operation in optimal operating conditions (TCP: 430 mg/L, cycles/d: 8, and HRT: 6 h) can remove nearly 100% of TCP and more than 95% of TP and COD. The role of the presence of an RBB in removing TCP, TP, and COD was 7, 20, and 23%, respectively. The role of rotation of RBB also was 23%, 10, 21, and 62%, respectively. So, SBR-RBB, with the sequential anaerobic-aerobic operation, was able to remove higher concentrations of TCP (430 mg/L) in a shorter HRT (6 h) with higher efficiency (nearly 100%) compared to previous studies. Therefore, for the first time in this study, the biological treatment of 430 mg/L of TCP is reported by a biological process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Ghochlavi

Aghapour²

2022

Front. Environ. Sci.

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Analyzing microbial communities and their biodegradation of multiple pharmaceuticals in membrane bioreactors

Suleiman

Demaria

Zimmardi

et al. 2023

Appl Microbiol Biotechnol

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Pharmaceuticals are of concern to our planet and health as they can accumulate in the environment. The impact of these biologically active compounds on ecosystems is hard to predict, and information on their biodegradation is necessary to establish sound risk assessment. Microbial communities are promising candidates for the biodegradation of pharmaceuticals such as ibuprofen, but little is known yet about their degradation capacity of multiple micropollutants at higher concentrations (100 mg/L). In this work, microbial communities were cultivated in lab-scale membrane bioreactors (MBRs) exposed to increasing concentrations of a mixture of six micropollutants (ibuprofen, diclofenac, enalapril, caffeine, atenolol, paracetamol). Key players of biodegradation were identified using a combinatorial approach of 16S rRNA sequencing and analytics. Microbial community structure changed with increasing pharmaceutical intake (from 1 to 100 mg/L) and reached a steady-state during incubation for 7 weeks on 100 mg/L. HPLC analysis revealed a fluctuating but significant degradation (30–100%) of five pollutants (caffeine, paracetamol, ibuprofen, atenolol, enalapril) by an established and stable microbial community mainly composed of Achromobacter, Cupriavidus, Pseudomonas and Leucobacter. By using the microbial community from MBR1 as inoculum for further batch culture experiments on single micropollutants (400 mg/L substrate, respectively), different active microbial consortia were obtained for each single micropollutant. Microbial genera potentially responsible for degradation of the respective micropollutant were identified, i.e. Pseudomonas sp. and Sphingobacterium sp. for ibuprofen, caffeine and paracetamol, Sphingomonas sp. for atenolol and Klebsiella sp. for enalapril. Our study demonstrates the feasibility of cultivating stable microbial communities capable of degrading simultaneously a mixture of highly concentrated pharmaceuticals in lab-scale MBRs and the identification of microbial genera potentially responsible for the degradation of specific pollutants. Key points • Multiple pharmaceuticals were removed by stable microbial communities. • Microbial key players of five main pharmaceuticals were identified.

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Biological degradation and mineralization of tetracycline antibiotic using SBR equipped with a vertical axially rotating biological bed (SBR-VARB)

2023

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Tetracycline (TC) is a widely used antibiotic with a complex aromatic chemical structure and is highly resistant to biodegradation. In this study, an SBR equipped with a vertical axially rotating biological bed (SBR-VARB) was used for the biodegradation and mineralization of TC. SBR-VARB showed high efficiency in removing TC (97%), total phenolic compounds (TP) (95%), and COD (85%) under optimal operating conditions (TC = 50 mg/L, HRT = 1.75 d, and OLR = 36 g COD/m3 d). The SBR-VARB was able to treat higher concentrations of TC in shorter HRT than reported in previous studies. The contribution of VARB to improve SBR efficiency in removing TC, TP, and COD was 16, 36, and 48%, respectively. Intermediate compounds formed during the biodegradation of TC were identified using GC–MS under the optimal operating conditions of the bioreactor. These are mainly organic compounds with linear chemical structures. Based on the complete biodegradation of TC under the optimal operating conditions of the bioreactor, 93% and 36% of the chlorine and nitrogen atoms in the chemical structure of TC appeared in the wastewater, respectively. According to the sequence analysis of 16SrDNA, Pseudomonas sp., Kocuria Polaris, and Staphylococcus sp. were identified in the biofilm of VARB and the suspended biomass of the bioreactor. Therefore, SBR-VARB showed high efficiency in the biodegradation and mineralization of TC and can be used as a suitable option for treating wastewater containing antibiotics and other toxic compounds.

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Investigating the biological degradation of the drug β-blocker atenolol from wastewater using the SBR

Cited by 12 publications

References 46 publications

Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Analyzing microbial communities and their biodegradation of multiple pharmaceuticals in membrane bioreactors

Biological degradation and mineralization of tetracycline antibiotic using SBR equipped with a vertical axially rotating biological bed (SBR-VARB)

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