GAOPeng,WANGPanxin,ZHANGLei,et al.Efficiency and Stability of Catalytic Ozonation for Biochemical Effluent from Baijiu Brewing[J].China Water & Wastewater,2026,42(9):18-23.
Efficiency and Stability of Catalytic Ozonation for Biochemical Effluent from Baijiu Brewing
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第9期
Page:
18-23
Column:
Date of publication:
2026-05-01
- Keywords:
- catalytic ozonation; biochemical effluent from Baijiu brewing; high hardness; scaling; catalyst
- Abstract:
- To address catalyst layer scaling and bed clogging during catalytic ozonation of high-hardness biochemical effluent from Baijiu brewing, this study employed comparative batch and continuous-flow experiments to evaluate organic pollutant removal efficiency and the impact of calcium ion migration on process stability. Results demonstrated that under optimal conditions (ozone dosage of 200 mg/L, temperature of 25 ℃), the catalytic system enhanced COD and TOC removal efficiencies by 15.9% and 10.5%, respectively, compared with sole ozonation. During 20-hour continuous operation, 42.6% of calcium ions were retained within the system, causing COD removal efficiency to decline from 38.5% to 26.7%, accompanied by a 15.1% reduction in TOC removal. Chemical elution and characterization revealed that approximately 70.4% of the retained calcium accumulated in catalyst pores via adsorption/precipitation, whereas initially formed CaCO3 solids detached almost entirely from the catalyst surface, forming suspended particles. For engineering applications, integrating backwashing with pre-softening or developing anti-scaling processes is recommended to overcome the engineering bottlenecks in catalytic ozonation of high-hardness wastewater.
Last Update:
2026-05-01