The MBBR is a purely biological wastewater treatment plant. The biofilm required for the cleaning performance settles on floating growth bodies with a very large surface. The oxygen is supplied by a compressor installed outside the moving bed reactor in the container.
The composition of the waste water is a prerequisite for effective cleaning. The wastewater entering the treatment plant must be biodegradable. Surfactants, strong detergents or disinfectants should be avoided.
Wastewater is collected in a pumping station and pumped into the buffer tank or into the MBBR reactor (depending on capacity). Before the wastewater flows into the containers, the coarse materials are separated by means of an automatic fine sieve and transported to a suitable container.
In order to compensate for inflow fluctuations, a buffer tank is installed, where the wastewater is temporarily stored during the strong inflow periods (morning, midday, evening) and pumped evenly into the MBBR tank.
The actual biological cleaning takes place in the fluidized bed reactor, in the so-called. “Moving Bed Bio Reactor – MBBR” will take place. The bacteria settle on the carrier material - BioChip 25 and move freely in the reactor.
In the MBBR, the wastewater is intermittently aerated. Aeration takes place via appropriately designed aerators with fine-bubble aeration. As a result, both the microorganisms are supplied with oxygen and the complete reactor contents are mixed. An air compressor is used to generate compressed air. The microorganisms themselves are fixed on small BioChips.
The biologically treated wastewater flows into the secondary clarifier, which is designed as a sloping plate separator. In the secondary clarification, the cleaned wastewater and biomass are separated.
The cleaned wastewater flows off via a drainage channel, the so-called excess sludge settles on the floor, where it is periodically sucked off by a pump.
The separated sludge is either disposed of directly, pumped into a sludge storage tank or mechanically dewatered to significantly reduce the volume. The dewatered sludge (about 20-50% dry matter) can be used as fertilizer, disposed of locally or incinerated.