Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum
Biotransformation and biodegradation of estrogenic compounds by bacteria and even fungi have been reported widely, but the role of microalgae in the elimination of estrogens from municipal wastewater treatment plants and their interaction with other microorganisms in wastewater are not clear. This s...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-12-01
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| Series: | Water Science and Technology |
| Subjects: | |
| Online Access: | http://wst.iwaponline.com/content/88/11/2837 |
| _version_ | 1797389182964858880 |
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| author | Ping Wang Jianwen Luan Lijuan Luo |
| author_facet | Ping Wang Jianwen Luan Lijuan Luo |
| author_sort | Ping Wang |
| collection | DOAJ |
| description | Biotransformation and biodegradation of estrogenic compounds by bacteria and even fungi have been reported widely, but the role of microalgae in the elimination of estrogens from municipal wastewater treatment plants and their interaction with other microorganisms in wastewater are not clear. This study reported the feasibility of repeatedly removing a mixture of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2), each was 100 μg L−1, from primary settled municipal sewage by Selenastrum capricornutum (SC), a ubiquitous microalga, in four exposure cycles, each lasted 7 days, and how they interacted with the microbial consortium in sewage. Mixed estrogen in sewage stimulated the growth of SC, and the indigenous microorganisms in sewage also affected the microalgal growth. The indigenous microorganisms, particularly bacteria, could easily remove E2 (with 99.5% removal), so the role of SC was insignificant. On the contrary, EE2 was difficult to remove by indigenous microorganisms but the removal was significantly enhanced by SC, with almost all spiked EE2 being removed, even at the end of the fourth cycle (with 99.0% removal). These results indicated that SC, together with the indigenous microorganisms in wastewater, could be repeatedly used for simultaneous removal of E2 and EE2 from municipal sewage.
HIGHLIGHTS
Growth of S. capricornutum (SC) was affected by estrogen and sterilization.;
The role of SC to remove E2 was insignificant as indigenous microbes were effective.;
The inoculation of SC significantly enhanced the removal of EE2 in sewage.;
SC could be repeatedly used to remove synthetic EE2 from sewage.; |
| first_indexed | 2024-03-08T22:52:08Z |
| format | Article |
| id | doaj.art-fd45d6d8f834487ea48edf98754730cc |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-03-08T22:52:08Z |
| publishDate | 2023-12-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-fd45d6d8f834487ea48edf98754730cc2023-12-16T11:36:08ZengIWA PublishingWater Science and Technology0273-12231996-97322023-12-0188112837284810.2166/wst.2023.390390Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutumPing Wang0Jianwen Luan1Lijuan Luo2 National Testing & Certification International Group Jingcheng Testing Co., Ltd, Guangzhou 511494, China National Testing & Certification International Group Jingcheng Testing Co., Ltd, Guangzhou 511494, China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China Biotransformation and biodegradation of estrogenic compounds by bacteria and even fungi have been reported widely, but the role of microalgae in the elimination of estrogens from municipal wastewater treatment plants and their interaction with other microorganisms in wastewater are not clear. This study reported the feasibility of repeatedly removing a mixture of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2), each was 100 μg L−1, from primary settled municipal sewage by Selenastrum capricornutum (SC), a ubiquitous microalga, in four exposure cycles, each lasted 7 days, and how they interacted with the microbial consortium in sewage. Mixed estrogen in sewage stimulated the growth of SC, and the indigenous microorganisms in sewage also affected the microalgal growth. The indigenous microorganisms, particularly bacteria, could easily remove E2 (with 99.5% removal), so the role of SC was insignificant. On the contrary, EE2 was difficult to remove by indigenous microorganisms but the removal was significantly enhanced by SC, with almost all spiked EE2 being removed, even at the end of the fourth cycle (with 99.0% removal). These results indicated that SC, together with the indigenous microorganisms in wastewater, could be repeatedly used for simultaneous removal of E2 and EE2 from municipal sewage. HIGHLIGHTS Growth of S. capricornutum (SC) was affected by estrogen and sterilization.; The role of SC to remove E2 was insignificant as indigenous microbes were effective.; The inoculation of SC significantly enhanced the removal of EE2 in sewage.; SC could be repeatedly used to remove synthetic EE2 from sewage.;http://wst.iwaponline.com/content/88/11/2837biotransformationestrogensindigenous microbesmicroalgaewastewater |
| spellingShingle | Ping Wang Jianwen Luan Lijuan Luo Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum Water Science and Technology biotransformation estrogens indigenous microbes microalgae wastewater |
| title | Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum |
| title_full | Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum |
| title_fullStr | Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum |
| title_full_unstemmed | Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum |
| title_short | Removal of estrogens from primary settled sewage by repeated culture of Selenastrum capricornutum |
| title_sort | removal of estrogens from primary settled sewage by repeated culture of selenastrum capricornutum |
| topic | biotransformation estrogens indigenous microbes microalgae wastewater |
| url | http://wst.iwaponline.com/content/88/11/2837 |
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