SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (2): 393-399.DOI: 10.1016/j.cjche.2017.06.006

• Biotechnology and Bioengineering • Previous Articles     Next Articles

Biodegradation of natural and synthetic estrogens in moving bed bioreactor

Mohammad Mehdi Amin1,2, Bijan Bina1,2, Karim Ebrahim1,2, Zeynab Yavari2,3, Farzaneh Mohammadi2,3   

  1. 1 Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran;
    2 Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran;
    3 Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
  • Received:2017-03-18 Revised:2017-06-06 Online:2018-03-16 Published:2018-02-28
  • Contact: Zeynab Yavari

Biodegradation of natural and synthetic estrogens in moving bed bioreactor

Mohammad Mehdi Amin1,2, Bijan Bina1,2, Karim Ebrahim1,2, Zeynab Yavari2,3, Farzaneh Mohammadi2,3   

  1. 1 Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran;
    2 Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran;
    3 Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
  • 通讯作者: Zeynab Yavari

Abstract: Estrogen hormones as a group of endocrine disruptive compounds (EDC) can interfere with endocrine system in humans and animals. The goal of this study was to investigate the elimination rate of Estrone (E1), 17β-estradiol (E2) and 17α-ethinyl estradiol (EE2) in Moving Bed Bioreactor (MBBR). These analytes extracted by Dispersive Liquid-Liquid Microextraction (DLLME) technique, followed by derivatization, and detected by GC/MS. Estrogen removal efficiency in MBBR improved at high solid retention times (SRTs), which notion is owing to development of nitrification. Estrogen specific removal rate was between 0.22-1.45 μg·(g VSS)-1·d-1 for natural and synthetic hormones. The adsorption rate was 0.9%-3.2%, 0-1.3%, and 0.7%-5.7% for E1, E2, and EE2, respectively. In addition, the biodegradation rates were more than 95% for these compounds. These results illustrated that in MBBR, the biodegradation and the adsorption to biomass are considered as two significant routes for elimination of estrogenic compounds. As a whole, the deterioration rate of estrogens enhanced by MBBR compared to other biological wastewater treatment processes such as conventional activated sludge.

Key words: Estrogen hormones, Adsorption, Biodegradation, Nitrification

摘要: Estrogen hormones as a group of endocrine disruptive compounds (EDC) can interfere with endocrine system in humans and animals. The goal of this study was to investigate the elimination rate of Estrone (E1), 17β-estradiol (E2) and 17α-ethinyl estradiol (EE2) in Moving Bed Bioreactor (MBBR). These analytes extracted by Dispersive Liquid-Liquid Microextraction (DLLME) technique, followed by derivatization, and detected by GC/MS. Estrogen removal efficiency in MBBR improved at high solid retention times (SRTs), which notion is owing to development of nitrification. Estrogen specific removal rate was between 0.22-1.45 μg·(g VSS)-1·d-1 for natural and synthetic hormones. The adsorption rate was 0.9%-3.2%, 0-1.3%, and 0.7%-5.7% for E1, E2, and EE2, respectively. In addition, the biodegradation rates were more than 95% for these compounds. These results illustrated that in MBBR, the biodegradation and the adsorption to biomass are considered as two significant routes for elimination of estrogenic compounds. As a whole, the deterioration rate of estrogens enhanced by MBBR compared to other biological wastewater treatment processes such as conventional activated sludge.

关键词: Estrogen hormones, Adsorption, Biodegradation, Nitrification