BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES

ZHOU Kang; WANG Zhen-kai; ZHANG Gui-cheng; CHEN Xin-an; CHENG Yan; LUO Gang; SUN Sheng-peng

doi:10.13205/j.hjgc.202205006

Volume 40 Issue 5

Jul. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(5): 37-43

ZHOU Kang, WANG Zhen-kai, ZHANG Gui-cheng, CHEN Xin-an, CHENG Yan, LUO Gang, SUN Sheng-peng. BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 37-43. doi: 10.13205/j.hjgc.202205006

Citation:

ZHOU Kang, WANG Zhen-kai, ZHANG Gui-cheng, CHEN Xin-an, CHENG Yan, LUO Gang, SUN Sheng-peng. BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 37-43. doi: 10.13205/j.hjgc.202205006

Citation:

ZHOU Kang, WANG Zhen-kai, ZHANG Gui-cheng, CHEN Xin-an, CHENG Yan, LUO Gang, SUN Sheng-peng. BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 37-43. doi: 10.13205/j.hjgc.202205006

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BIODEGRADATION AND TERTIARY TREATMENT EFFICIENCIES OF TYPICAL PHARMACEUTICAL MICROPOLLUTANTS BY MBBR AND UVC-BASED ADVANCED OXIDATION PROCESSES

doi: 10.13205/j.hjgc.202205006

1. School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;
2. Ningbo Sentrol Environmental Conservation Equipment Co., Ltd, Ningbo 315000, China;
3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China

Received Date: 2021-07-09
Available Online: 2022-07-02

Abstract

Abstract

This study investigated the biological degradation behavior of 6 typical pharmaceutical micropollutants in wastewater by a moving bed biofilm reactor(MBBR). The tertiary treatment of the residual target micropollutants from the MBBR effluents by UVC-activated H₂O₂, HSO^-₅ and S₂O^2-₈ processes were further investigated under a continuous-flow mode. The results showed that the MBBR process was capable of efficiently degrading N,N-diethyl-meta-toluamide, gemfibrozil and ibuprofen(e.g., their mean degradation rates achieved 835.5, 889.2, 653.3 μg/(L·d), respectively); which however was inefficient in degrading carbamazepine, crotamiton and trimethoprim. The presence of the target pharmaceuticals exhibited negligible impacts on the organic carbon source removal and ammonium nitrification in the MBBR. The high-throughput sequencing results indicated that the majority of microbial communities in the MBBR were classified to the phylum Proteobacteria(65.6%), Planctomycetes(14.8%), Bacteroidetes(7.4%) and Chloroflexi(4.2%); and the major genera included Hyphomicrobium(31.6%), Methylotenera(10.7%), SMIA02(9.6%) and OLB12(4.9%). UVC-activated H₂O₂, HSO^-₅ and S₂O^2-₈ processes could efficiently degrade the residual pharmaceutical micropollutants from the MBBR effluent, 92.7%~99.4% degradation efficiencies of the target pharmaceuticals were obtained by using 1.0 mmol/L of oxidants under the given conditions. In comparison with UVC/H₂O₂ process, UVC/S₂O^2-₈ and UVC/HSO^-₅ processes exhibited higher selectivity toward the degradation of the target pharmaceutical micropollutants.
- micropollutants,
- pharmaceuticals,
- MBBR,
- advanced oxidation,
- tertiary treatment

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References(31)

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