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Advanced Treatment of the Antibiotic Production Wastewater by Ozone/Zero‐Valent Iron Process
Author(s) -
Ji Yanping,
Pan Zhicheng,
Yuan Donghai,
Lai Bo
Publication year - 2018
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201700666
Subject(s) - ozone , zerovalent iron , chemical oxygen demand , chemistry , wastewater , degradation (telecommunications) , oxygen , fourier transform infrared spectroscopy , biochemical oxygen demand , nuclear chemistry , chemical engineering , environmental engineering , adsorption , environmental science , organic chemistry , telecommunications , computer science , engineering
In this study, ozone/zero‐valent iron (ZVI) process is investigated to treat the refractory noxious antibiotic production wastewater. Effects of reaction conditions such as initial pH (2.5–8), ozone flow rate (0–0.5 L min −1 ), Fe 0 dosage (0–7 g L −1 ), stirring speed (0–400 rpm), temperature (8–80 °C), and reaction time (0–60 min) on biochemical oxygen demand after five days (BOD 5 ), chemical oxygen demand (COD) removal are studied, respectively. The results showed that high COD removal (79.9%) and BOD 5 /COD ratio (0.36) are obtained under the optimal conditions (initial pH 2.5, Fe 0 dosage = 60 g L −1 , ozone flow rate = 0.25 L min −1 , reaction temperature = 30 °C, stirring speed = 300 rpm, reaction time = 60 min). The results indicate that refractory noxious compositions can be transferred and decomposed by the ozone/ZVI process dramatically. In addition, three control experiments (i.e., air/ZVI process, ZVI process, and ozone process) are performed to confirm the superiority of the ozone/ZVI process. Moreover, the degradation process is analyzed by UV–vis, Fourier‐transform infrared (FTIR), and excitation‐emission matrix (EEM) fluorescence spectroscopies. Therefore, the ozone/ZVI process is a potential and effective method for the advanced treatment of antibiotic production wastewater.