Antibiotic removal from waste milk by electrochemical process: degradation characteristics in concentrated organic solution

Abstract

The use of antibiotics in lactating dairy cows produces waste milk containing antibiotic residues. Antibiotics have been one of the emerging pollutants in the environment. Waste milk is a concentrated wastewater because it contains organic matter at high concentrations. The objective was to clarify the removal characteristics of chlortetracycline and cefazolin contained in waste milk using the electrochemical oxidation by a comparative study with in aqueous solution. This paper discussed partial and preferential oxidation of the antibiotic dissolved in milk to reduce the energy consumption during the treatment. The preferential degradation of antibiotic as a target compound on the basis of pseudo-first-order reaction kinetics led the charge saving treatment. The results indicated that the electrochemical oxidation can effectively treat the low levels of the antibiotic residues even in concentrated wastewater not only in usual dilute solutions.

Experimental assessment of the efficacy of copper ion treatment against penicillin G contained in UHT milk and PBS

“…Kitazono et al (2012), who found an 83% reduction in the concentration of oxytetracycline after a 6-hour treatment, used electrochemical oxidation of metals for the degradation of antibiotics in WM. In a later study, Kitazono et al (2017) demonstrated the degradation of chlortetracycline and cephalozine with ions produced by electrical stimulation of a titanium cathode. The degradation of antibiotics in other aqueous matrices in the presence of various metal compounds has also been demonstrated (Wang & Zhuan, 2020).…”

“…In experimental trials, there is evidence of the efficacy of electrochemical oxidation of metals for the degradation of antibiotics in waste milk. Kitazono et al (2017) demonstrated the degradation of chlortetracycline and cephalozine with ions produced by the electrical stimulation of a titanium cathode, while Elmola & Chaudhuri (2009) demonstrated the degradation of amoxicillin, ampicillin, and cloxacillin using the Fenton reaction, which involves the use of iron ions and hydrogen peroxide. Electrochemical oxidation is a process in which organic substances are oxidized and converted into nontoxic substances under the action of an electric current (Wang & Zhuan, 2020).…”

Contaminants in the cow's milk we consume? Pasteurization and other technologies in the elimination of contaminants

“…227 For the elimination of antibiotics in cow's milk, methods such as ozonation have been applied, with about 95% degradation for amoxicillin, doxycycline, ciprofloxacin, and sulfadiazine. 236 Electrochemical oxidation applied for the removal of small concentrations of chlortetracycline, cefazolin, 237 and oxytetracycline 238 was also described. Gamma radiation was also found to be effective for the removal of amoxicillin, ciprofloxacin, and doxycycline by 90% in cow's milk samples.…”