Colloide provides circular and rectangular scraping systems (plastic and steel) for settlement and flotation tanks. These tanks are generally rectangular or circular, designed to separate out the solids from the liquid by either settlement or flotation.
We offer two alternatives for circular tanks:
A chain and flight principle is used for rectangular tanks, consisting of two main chains which move the scraping booms up and down the tanks. When scraping at top water level, the booms push the floated material to one end of the tank, where it is collected by a rotating sludge pipe or, alternatively, a collection channel with an adjustable weir.
Applications include: primary settlement tanks for wastewater treatment; final settlement tanks for wastewater treatment; rectangular settlement tanks for wastewater treatment; rectangular dissolved air flotation tanks for drinking water application; rectangular dissolved air flotation tanks for wastewater treatment.