Effect of ciprofloxacin dosages on the performance of sponge membrane bioreactor treating hospital wastewater

Thanh-Tin Nguyen; Xuan-Thanh Bui; Bao-Trong Dang; Huu-Hao Ngo; Deokjin Jahng; Takahiro Fujioka; Shiao-Shing Chen; Quoc-Tuc Dinh; Cong-Nguyen Nguyen; Phan-Thai-Vy Nguyen

doi:10.1016/j.biortech.2018.11.058

Effect of ciprofloxacin dosages on the performance of sponge membrane bioreactor treating hospital wastewater

Bioresour Technol. 2019 Feb:273:573-580. doi: 10.1016/j.biortech.2018.11.058. Epub 2018 Nov 16.

Authors

Affiliations

¹ Environmental Engineering and Management Research Group & Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam. Electronic address: [email protected].
² Faculty of Environment and Natural Resource, University of Technology, Viet Nam National University - Ho Chi Minh, Ho Chi Minh City, Viet Nam. Electronic address: [email protected].
³ Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam.
⁴ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
⁵ Department of Environmental Engineering and Energy, Myongji University, Republic of Korea.
⁶ Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
⁷ Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei 10608, Taiwan.
⁸ NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam.
⁹ Faculty of Environment and Natural Resources, Da Lat University, Viet Nam.
¹⁰ Faculty of Environment and Natural Resource, University of Technology, Viet Nam National University - Ho Chi Minh, Ho Chi Minh City, Viet Nam.

PMID: 30476866
DOI: 10.1016/j.biortech.2018.11.058

Abstract

This study aimed to evaluate treatment performance and membrane fouling of a lab-scale Sponge-MBR under the added ciprofloxacin (CIP) dosages (20; 50; 100 and 200 µg L^-1) treating hospital wastewater. The results showed that Sponge-MBR exhibited effective removal of COD (94-98%) during the operation period despite increment of CIP concentrations from 20 to 200 µg L^-1. The applied CIP dosage of 200 µg L^-1 caused an inhibition of microorganisms in sponges, i.e. significant reduction of the attached biomass and a decrease in the size of suspended flocs. Moreover, this led to deteriorating the denitrification rate to 3-12% compared to 35% at the other lower CIP dosages. Importantly, Sponge-MBR reinforced the stability of CIP removal at various added CIP dosages (permeate of below 13 µg L^-1). Additionally, the fouling rate at CIP dosage of 200 µg L^-1 was 30.6 times lower compared to the control condition (no added CIP dosage).

Keywords: Ciprofloxacin; Dosage; Hospital wastewater; Sponge membrane bioreactor.

MeSH terms

Biomass
Bioreactors*
Ciprofloxacin / pharmacology*
Hospitals
Waste Disposal, Fluid / methods*
Wastewater / chemistry*

Substances

Waste Water
Ciprofloxacin