Abstract
One of the applications of ozone for wastewater treatment is the destruction of difficult-oxidizing organic contaminants, including dyes. An important stage of development of water purification technology is the determination of the required degree of pollution destruction, effective doses of ozone and the period of water treatment. For example, in some cases when the dyes are degraded in textile sewage, the color reduction occurs with a slight decomposition of the organic substance of the dyes. The purification process is controlled by several indirect indicators, such as oxidizability, total organic carbon content, etc. We have conducted experimental researches and have studied the material balance of the ozonation process for wastewater containing dyes. Generalized method for determination of the consumption of ozone in the oxidation of contaminants in sewage waters and the technological indicator “chemical demand of ozone” are proposed. The method is quite universal and allows, while carrying out trial ozonation of water, to obtain dependence of ozone consumption for the processes of pollution destruction and determine the required specific dose of ozone.
Highlights
Usage of ozone as a strong oxidant is increasingly used in the technology of purification of industrial wastewater that contain artificial dyes
To develop water purification technology and design equipment, and to assess of the effectiveness of technological methods and equipment, it is necessary to have technological indicators describing the process of destruction of contaminants and ozone consumption
To assess the ability of contaminants in waste water to oxidize by ozone, we proposed a water quality indicator: "chemical demand of ozone" (CDO3) Oz, mgO3/l
Summary
Usage of ozone as a strong oxidant is increasingly used in the technology of purification of industrial wastewater that contain artificial dyes. To develop water purification technology and design equipment, and to assess of the effectiveness of technological methods and equipment, it is necessary to have technological indicators describing the process of destruction of contaminants and ozone consumption. Many industrial dyes are substances with large molecules consisting of cyclic groups connected by a double nitrogen bond (azogroup) or a carbon bond. Such organic substances possess low biodegradability [1]. Reducing the color of waste water, and removing of other biologically non-degradable organic contaminants is a complex technological challenge [2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
