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Title: Fate of tetracycline in enhanced biological nutrient removal process
Authors: Liu, Hang
Yang, Yongkui
Sun, Huifang
Zhao, Lin
Liu, Yu
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Liu, H., Yang, Y., Sun, H., Zhao, L., & Liu, Y. (2018). Fate of tetracycline in enhanced biological nutrient removal process. Chemosphere, 193, 998-1003. doi:10.1016/j.chemosphere.2017.11.136
Journal: Chemosphere
Abstract: This study investigated the fate of tetracycline at four different concentrations of 20 μg L-1, 50 μg L-1, 2 and 5 mg L-1 in the enhanced biological nutrient removal processes. At the tetracycline concentration below 50 μg L-1, no obvious inhibition on the biological N&P removal was observed, while the inhibition appeared after the tetracycline concentration was increased to 2 and 5 mg L-1. It was found that about 44%-87% of tetracycline was removed through biodegradation, while only 3%-6% of removal was due to biosorption. These results clearly suggested that a substantial amount of tetracycline eventually ended up in sludge with the tetracycline content of 23 mg to 4.5 g kg-1 sludge depending on the tetracycline concentration. Obviously, this could pose an emerging challenge to the post sludge disposal and reuse. Furthermore, phthalic anhydride was detected as a biodegradation byproduct of tetracycline, which has been known to be more toxic than tetracycline to aquatic organisms. Consequently, this study offers in-depth insights into the fate of tetracycline in the enhanced biological nutrient removal process, highlighting on the emerging ecological risks associated with sludge disposal and effluent discharge.
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2017.11.136
Rights: © 2017 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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