Related Experiment Video
Updated: Aug 18, 2026

Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods
Published on: December 9, 2022
The effects of preozonation on the biodegradability of mixed phenolic solution using a new gas-inducing reactor
Yung-Chien Hsu1, Hsiang-Cheng Yang, Jyh-Herng Chen
1Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Sector 4, Keelung Road, Taipei 106, Taiwan. hsu@ch.ntust.edu.tw
Abstract:
In this study, the effects of preozonation on the biodegradability of mixed 2-chlorophenol/4-cresol solution were investigated using a new gas-inducing reactor, which can provide high ozone utilization efficiency. The decomposition rate of phenolic mixture, COD removal and TOC removal increases with increasing pH. A half-order overall kinetic model can correctly describe the decomposition of phenolic mixture. The BOD(5)/COD ratio of the preozonized solutions increases with increasing preozonation time, indicating that preozonation can enhance the biodegradability. Based on high ozone utilization rate, it is concluded that the best characteristic time can be chosen at the rapid increase of ozone gas outlet concentration. Since the ozone gas outlet concentration can be easily monitored, it is a useful real-time control parameter in preozonation.
Related Concept Videos
Bioreactor Controls-II
Microbial Bioremediation of Pesticides
Oxidative Cleavage of Alkenes: Ozonolysis
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Oxidation of Phenols to Quinones
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Bioremediation

