Pilot-scale study on advanced treatment of dyeing wastewater by enhanced ozonation with iron-based catalyst
Journal Title: Energy Environmental Protection - Year 2024, Vol 38, Issue 1
Abstract
A pilot-scale catalytic ozonation was conducted for the advanced treatment of dyeing wastewater from the secondary treatment process in a sewage treatment plant in Yulin, Guangxi Province. An iron-based catalyst derived from in-situ modification of iron shavings was used to investigate the performance of catalytic ozonation on COD and color removal of dyeing wastewater. The results showed that with the catalytic ozonation reactor and reaction conditions used in this study, the influent COD ranged from 40 to 60 mg·L-1, the color ranged from 80 to 120 PCU, and the pH value ranged from 6 to 9. The effluent water quality was stabilized to meet the Reusing Water for Textile Dyeing and Finishing (FZ/T 01107—2011) standard after undergoing this treatment process. Especially when the influent COD was maintained below 40 mg·L-1, the effluent COD could be reduced to 30 mg·L-1 or even 20 mg·L-1, and the effluent water quality met the Environmental Quality Standards for Surface Water (GB 3838—2002) Class IV water standard. The hydraulic retention time (HRT) on the treatment effect followed normal distribution. Under the experimental conditions, the optimal HRT for this wastewater was 60 min. The active components and the "micro-channel" structure of the iron-based catalyst were conducive to the combination of ozone and the catalytic components, and also promoted the release and action of hydroxyl radicals. Therefore, the ozone utilization rate was improved, with the O3/ΔCOD value remaining below 2.
Authors and Affiliations
FAN Jinhong|College of Environmental Science and Engineering, Tongji University, China, YANG Yuwei|College of Environmental Science and Engineering, Tongji University, China, MA Luming*|College of Environmental Science and Engineering, Tongji University, China
Keywords
Related Articles
- EP ID EP736943
- DOI 10.20078/j.eep.20240118
- Views 51
- Downloads 0
Research advance on the degradation of antibiotics through advanced oxidation technology using persulfate
In recent years, with the improvement of living standards, the production and use of pharmaceutical increased sharply in our country, and pharmaceutical and personal care products (PPCPs) is also growing rapidly, which l...
Prediction and optimization of struvite recovery from wastewater by machine learning
The recovery of nitrogen and phosphorus from simulated wastewater in the form of struvite was investigated through a Machine Learning (ML)-based approach. The Extreme Gradient Boosting Algorithm (XGBoost) and Random Fore...
Catalytic purification of nitrogen oxides for complex industrial flue gas
Nitrogen oxides, as one of the main atmospheric pollutants, cause potential risks to human health and the atmospheric environment. In recent years, nitrogen oxide emissions from power plants have been reduced, and contro...
Numerical simulation analysis of activated carbon injection adsorption in flue gas purification application
Sludge blending has become one of the means to transform the energy structure of coal-fired power plants. Based on the existing coal-fired flue gas system of Zhejiang Jinhua Ningneng Thermal Power Plant, this paper propo...
Computational study on pyrolysis mechanism of β-5 linked lignin dimers
Lignin is a highly complex amorphous three-dimensional network polymer connected by C—O bond and C—C bond. Understanding the bond cleavage mechanism during lignin pyrolysis is crucial for advancing efficient pyrolysis te...