Siltbuster's Roadside Concrete Waste (RCW) recovery system is designed for the onsite disposal of waste concrete and alkaline waste wash water generated in the construction industry.
The unit works by passing washed out wastewater into two large dewatering bags at the front of the RCW unit.
The dewatering bags act as a filter system to remove the solids from the water as it passes through the bags into the main chamber for pH adjustment.
The disposal of waste concrete, mortar and untreated alkaline waste water (pH 10 to 12) to ground contravenes most environmental management systems and can result in breaches in UK environmental legislation.
For this reason, the highly alkaline wastewater undergoes pH adjustment using carbon dioxide to lower the pH, which in turn causes the solids to precipitate.
The discharged water is then within required pH limits (pH 6.5 to 8.5), and can be discharged to sewer or water course.