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Stone wool as filter for runoff water

Stone wool is an effective filter medium

Runoff rainwater is not clean

Rainwater that falls is relatively clean. But once it ends up in the gutter, undesirable and harmful substances from roofs, cars, and streets are washed away with the water.

 

 

In a scientific study by Boogaard et al (2014), the concentrations of polluting substances in Dutch runoff rainwater were measured. The measured concentrations of many substances, including nutrients, copper and zinc, exceeded the Dutch standard for maximum allowable concentrations (MAC) for receiving waters. Microplastics are also becoming an increasing source of concern.

 

Stone wool captures pollution - with the power of stone

Rockflow stone wool is made from rock. The mineral fibres of stone are microscopically small. These fine fibres form a dense network with a large surface area, effectively filtering out pollution. Therefore, a Rockflow buffer not only captures water but also cleans it: The fibre structure effectively holds back suspended particles and common dissolved pollutants in urban stormwater.

 

Stone wool fibre network

The dense network of mineral stone wool fibres effectively captures pollution.

The microscopically small fibres of Rockflow retain solid particles. Dissolved pollution particles attach to (small) solid particles and are also captured along with the particles. Additionally, dissolved pollution particles also bind to the mineral fibres themselves.

Discover our solutions:

20230421 RW-LF PHO 772
Solutions

Rockflow® filterbuffer

Efficient rainwater storage as well as a positive contribution to water quality

Discover other solutions with Rockflow stone wool:

Solutions

Rainwater attenuation & infiltration

With Rockflow systems, you can effectively capture and attenuate rainwater and gradually infiltrate it into the soil. This prevents urban flooding and contributes to groundwater replenishment, even in urban areas where space is at a premium.

Solutions

Reuse water for urban green

Rainwater collected with Rockflow can be reused for improved water supply for green areas. Thanks to the capillary force of stone wool, water can be retained for absorption by vegetation.