Treatment of sewage in a sewer
By introducing nanobubbles and ozone into wastewater followed by thermal treatment, the method addresses sewer odor and corrosion issues, ensuring efficient wastewater treatment and heat exchanger longevity.
WO2025172396A1 Publication Date: 2025-08-21BÖTTCHER INGMAR
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Patent Information
- Application Number
- PCT/EP2025/053788
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-14
- Filing Date
- 2025-02-13
- Publication Date
- 2025-08-21
AI Technical Summary
Technical Problem
Sewer systems face challenges due to increased bacterial activity and odor formation from hydrogen sulfide, leading to oxygen depletion and corrosion, with existing wastewater treatment methods being inefficient and prone to heat exchanger contamination.
Method used
Introduce gas bubbles containing oxygen and/or ozone with diameters of 500 nm or less into wastewater, followed by thermal treatment using a heat exchanger within 5 m, to condition and prevent biofilm formation, thereby reducing odors and corrosion.
Benefits of technology
The method effectively maintains heat exchanger efficiency by preventing biofilm, enhancing oxygen uptake, and reducing sewer corrosion and odors, while also allowing for waste heat recovery.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method for treating sewage (3) in a treatment portion (2) of a sewer (1), wherein, in the treatment portion (2), * gas bubbles (7) containing oxygen and / or ozone are introduced into the sewage (3) at a first introduction point (4), at least 50% of which gas bubbles have a diameter of at most 500 nm, and * the sewage (3) is then guided over at least part of a heat exchange device (8) and thermally treated in the process, wherein the heat exchange device (8) is spaced apart from the first introduction point (4) at a maximum distance of 5 m.
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