High Rate Clarifier (Sedimentation Tank)
TOSAQUA™
Four times higher flow rate than conventional clarifiers
Why Toshiba?
In the field of industrial water treatment, a large space is needed for conventional clarifiers (sedimentation tanks) due to the low efficiency of suspended solids sedimentation leading to a low flow rate of treated water.
We, Toshiba, have developed a High Rate Clarifier (sedimentation tank), which implemented latest fluid simulation to achieve appropriate flow dispersion and four times higher flow rate than conventional clarifiers.
Highlights
- This clarifier separates suspended solids from wastewater by sedimentation at a high water linear velocity of more than 4 m/h (four times higher than conventional clarifiers).
- It can reduce construction costs by reducing the diameter and height of the tank.
- By virtue of the higher flow rate, it requires only one fourth of the installation space, compared to conventional clarifiers.
Original Structure
With latest simulation technology that leads to higher sedimentation efficiency and flow rate than conventional clarifiers, we built the original structure.
1Structure to distribute flocs
Raw water from the feed well flows uniformly into the clarifier
(sedimentation tank).
2Structure to prevent flocs
Most of the flocs near the wall are prevented from being carried over.
3Structure to refeed flocs into the feed well
Some of the flocs carried over are fed into the feed well again.
Configuration Example
Process Flow
Pre-treatment and High Rate sedimentation are carried out.
Pre-treatment
Chemicals are added to the raw water, and small particles are formed into flocs that can be separated by sedimentation.
pH control is applied when necessary.
High Rate sedimentation
Flocs are separated from the pre-treated water by sedimentation. Sedimentation is carried out at four times faster flow rate than conventional clarifiers.
Sludge is pulled out of the tank and sent to the sludge treatment process.
High Rate Clarifier (Sedimentation Tank) TOSAQUA™ Leaflet
Please download the High Rate Clarifier (Sedimentation Tank) TOSAQUA™ leaflet.
Contents
- Why Toshiba?
- 2Highlights
- Original Structure
- Configuration Example
High Rate Clarifier (Sedimentation Tank) TOSAQUA™ (PDF)(718KB)
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