Ozone micro-bubble disinfection method for wastewater reuse system
M Sumikura1, M Hidaka, H Murakami
1Power & Industrial Systems R&D Laboratory, Hitachi, Ltd., 7-2-1 Omika, Hitachi, Ibaraki, Japan. misaki.sumikura.mf@hitachi.com
Summary
Wastewater reuse is crucial for water security. This study shows that using micro-bubbles in ozonation systems can significantly improve disinfection efficiency, reducing equipment needs and ozone dosage for effective water treatment.
Area of Science:
- Environmental Science
- Water Treatment Technologies
- Chemical Engineering
Background:
- Global potable water shortages necessitate innovative water reuse strategies.
- Wastewater disinfection is a critical step for safe water reclamation.
- Micro-bubble technology offers potential advancements in water treatment processes.
Purpose of the Study:
- To evaluate the efficacy of a micro-bubble disinfection system for wastewater reuse.
- To investigate the disinfection capabilities of air and ozone micro-bubbles.
- To assess the impact of micro-bubbles on ozonation system performance.
Main Methods:
- Experimental examination of micro-bubble characteristics.
- Disinfection of secondary effluent using air and ozone micro-bubbles.
- Analysis of ozone decomposition and dose rate in micro-bubble ozonation.
Main Results:
- Micro-bubbles demonstrated effectiveness in wastewater disinfection.
- Ozone micro-bubbles significantly enhanced the ozonation process.
- Application of micro-bubbles led to reductions in reactor size, ozone decomposition equipment, and ozone dose.
Conclusions:
- Micro-bubble technology is a promising approach for enhancing wastewater disinfection.
- Integrating micro-bubbles into ozonation systems offers substantial efficiency gains.
- This technology contributes to sustainable water management and water reuse.
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