Fast filtration speed.

1,000 m/day for the daily maximum sewage volume. Approximately 3 times higher flow velocity than sand filtration

Resistant to raw water fluctuations (filtration rate, raw water SS concentration).

Volume filtration + surface filtration treatment by fixed filter media method, and stable treated water quality can be obtained.

Initial cost reduction

High-speed filtration and low head loss reduce overall height and construction costs.

Low running cost

It has a proven track record of a filter media life of 15 years or more, and maintenance costs are low because replenishment is not required during that time.

Concrete (RC) has also been used. high flow filtration