This plant is based on the process of biofiltration in an aerobic environment, and has been used for many years for the treatment of discharge water, both civil and industrial.
By using a number of small tanks the treatment ensures a high yield of organic substance for each unit of volume meaning a reduction in surface area that is necessary for the installation. Although it is possible to increase the capacity of the treatment by simply adding more tanks to the existing ones.
Essentially, the biofilter is made up of a vessel containing body filling on which an aerobic biomass can develop.
- reduced space required for installation
- possibility of increasing capacity
- easy to operate
- high volume load (kg. COD) * m3 reactor/d
- sedimentation stage not necessary
- low production of excess sludge
- excess sludge easily dehydrated
- very effective reduction of organic substances
- Although a reduction in surface agents is possible, the water retention time is very low.
How does it work?
The discharged water that is to undergo treatment passes though the biomass which uses the substances in the water for its metabolism. The water travels in a downwards direction through the tank and using the special oxigenation method, the water can be recycled innumerable times through the biomass before being discharged. This means that there is very close contact between the water to be treated and the biomass, thereby avoiding a hydraulic short circuit.
Air for oxygenation is blown in from the base of the reactor tank, this encourages the recycling of the liquid from top to bottom. The special type of reactor (with the biomass attached to a body filling) means that decantation is not necessary.