Our new, innovative wastewater treatment technology is based on a Rotating Bed (RB) bioreactor with specialised bacteria growing on carrier elements consisting of plastic granules. The bacteria decompose any chemicals and other impurities contained in the ambient water. Inside the reactors the carrier element is kept in a continuous rotary motion which secures the carrier element’s oxygen supply and keeps it clean at the same time.

Biower wastewater treatment plants consist of the following sub-processes:

• A sedimentation tank to remove the phosphorus.
• Bioreactor 1: oxygen-free denitrification that releases the chemically bound nitrogen.
• Bioreactor 2: carbon removal that converts carbon compounds into water and carbon dioxide and initiates the oxygenation of nitrogen compounds.
• Bioreactor 3: nitrification that oxygenates the nitrogen into nitrates.
• A mechanical clarifier.

Compared to conventional technologies, such as the Moving Bed method, the RB bioreactor is unbeatable on efficiency. At best, its energy consumption is only 10% of that of conventional methods. The use of space is also efficient: the reactor’s space requirement is only a fraction of that required by ordinary activated sludge and carrier-based processes.

Our carrier-based process with specialised bacteria technology can decompose ordinary impurities as well as phenols, formaldehydes, isocyanate, cyanide, acetone, methyl tertiary butyl ether (MTBE) and hydrocarbons.


Intelligent aeration minimises energy and space requirements

The bacteria living on the carrier surface need oxygen to decompose the impurities in the water. The required oxygen is fed into the reactor by means of an air blower. The blower also generates a rotary motion in the water bed.

The RB reactor’s carrier filling ratio is over 90%, compared to the mere 40% of conventional carrier-based processes, while the activated sludge process uses no carrier at all. Thanks to the high filling ratio, the amount of bacteria is high, which means that the water purification process is much faster compared to conventional methods. In addition, the reactor’s water column is of minimal height, which essentially reduces the aeration energy consumption. The high filling ratio also contributes to the remarkably low space requirement.

Since the carrier elements do not move in relation to water, the reactor is completely free from turbulence, which also minimises its energy consumption. The turbulence-free movement also prevents the carrier elements from wearing out and keeps the microbes tightly attached to the carrier surface.

When using conventional methods, air bubbles move directly up from the aerator bed at the bottom. In the Biower reactor, air bubbles remain longer within the process and keep revolving inside the aerator drum, thus enabling effective bacterial activity. This enhances the cleaning effect and reduces the aeration requirement, which cuts energy consumption.


Efficient removal of sludge

Since the carrier elements and water are in constant movement, the bacteria-generated sludge will not accumulate at the bottom of the reactor. Instead, it can be efficiently removed directly from the treated water.

The RB bioreactor used by Biower is based on the technology developed by Clewer. For additional information, please visit: www.clewer.com