Concrete Sustainability: Recycled Water
We previously struggled with the washing station capacity and now with the recycling plant, we have the competence for every one of our trucks with a more efficient and environmentally friendly solution.
One of the challenges of concrete production is the amount of waste water that is created by the necessary process of washing the truck mixers and batching plants. The water that is usually unloaded can overflow the disposal sites, causing harm to the surrounding natural environment. With our German partner, AJF Group, a developer and manufacturer of innovative water treatment plants, we have succeeded in providing the sustainable solution. That solution is the automatic water recycling plant.
The containerized unit is called CWAS. The goal of the automatic recycling plant is to have a closed water cycle and deplete water waste. The water is treated in such a way so that it can be used again for concrete production in a safe and sustainable manner. Depending on concrete specifications, concrete water can be reused 100% without adding fresh water. In addition, the water will be cleaned only to a certain water density of maximum 1.07kg/Ltr or 1.05kg/Ltr, contrary to what conventional plants are currently processing. This, in turn, lowers the overall costs of water disposal.
Regarding sediments in the concrete water, only particles with a diameter of less than 0.2mm will be washed out with the water. Larger particles coming out of the recycling plant are for reuse as aggregates. The recycled granulates are used by farmers to fertilize land improvement material and it has been tested specifically for this purpose. In the concrete making process, the material could be used as recycled material as well. Lujabetoni has made some tests, but has not implemented this future potential yet.
According to Service Manager at Lujabetoni, Timo Röyttä, they previously struggled with the washing station capacity and now with the recycling plant, they have the competence for every one of their trucks with a more efficient and environmentally friendly solution. The recycling plant works automatically and controls water density 24h/day. This ensures constant production conditions independent of manpower. It can solve the issue of water waste and clients will eliminate disposal costs. It is the complete system for possible independent concrete production, which also creates an environment that is more sustainable and green!