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Chemosphere

Title:		The effect of nitrification inhibitors on the aerobic biodegradation of tetracycline antibiotics in swine wastewater
Author(s):		Yang L; Yuan C; Chen X; Xue W; Cao G; Meng S; Bai L;
Address:		"National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai, 200237, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China; School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China. Electronic address: lyyang@ecust.edu.cn. School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China. Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, 350116, PR China. National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, East China University of Science and Technology, Shanghai, 200237, PR China; School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China. School of Space and Environment, Beihang University, Beijing, 100191, PR China. Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, PR China"
Journal Title:		Chemosphere
Year:		2023
Volume:		20221014
Issue:		Pt 1
Page Number:		136849 -
DOI:		10.1016/j.chemosphere.2022.136849
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"The aerobic biotreatment process for the dual goals of antibiotic removal and ammonia retainment for the field-return-based treatment of swine wastewater was optimized by adding 2-chloro-6-trichloromethylpyridine (TCMP), commonly used as a nitrogen fertilizer synergist. The results show that the dosage of 5-10 mg/L TCMP daily effectively inhibited nitrification. The COD and tetracycline antibiotics (TCs) in the absence of TCMP was removed by 91% and 76%, and became 87% and 78% with 5 mg/L TCMP and 83% and 70% with 10 mg/L TCMP, respectively. The removal efficiency of four TCs generally followed a decreasing trend of chlortetracycline (CTC) > doxycycline (DC) > tetracycline (TC) > oxytetracycline (OTC). A dosage of 5 mg/L TCMP daily inhibited ammonia nitrification effectively and only slightly affected the removal of conventional organic pollutants and TCs. The contribution of volatilization and hydrolysis to the removal of TCs was negligible. The overall removal efficiency of four TCs in removal pathway experiments was 98%, 94%, 97%, and 96% for OTC, CTC, DC, and TC, of which 69%, 41%, 56%, and 62% was contributed by absorption, and 29%, 53%, 41%, and 34% was contributed by biodegradation, respectively. This study may have significant implications for the proper management of livestock wastewater intended to be used as fertilizers, which aims to reduce the exposure risk of antibiotics and preserve its nutrient value"
Keywords:		Swine Animals Wastewater Nitrification Ammonia Tetracycline/metabolism Anti-Bacterial Agents *Oxytetracycline *Chlortetracycline Doxycycline *Heterocyclic Compounds Aerobic biodegradation Nitrification inhibitor Swine wastewater Tetracycline antibiotics;
Notes:		"MedlineYang, Linyan Yuan, Cheng Chen, Xueming Xue, Weibo Cao, Guomin Meng, Shujuan Bai, Lichun eng England 2022/10/18 Chemosphere. 2023 Jan; 311(Pt 1):136849. doi: 10.1016/j.chemosphere.2022.136849. Epub 2022 Oct 14"