BIOTIP kompakt – a standard device for biological wastewater treatment with the capacity of 5 to 10,000 PE (population equivalent).
Purpose: for gas stations, apartments, boarding houses, hotels, camps, shopping malls, border crossings, etc. Possible installation on parking lots.
SPECIFICITY OF BIOTIP kompakt
The specificity of this device is its installation without the primary clarifier and the disposal of primary sludge, without the need to construct and connect the device to the vent pipes.
BIOTIP kompakt is used for biological wastewater treatment of sanitary sewage wastewater and it is suitable for treatment of wastewater released from tourist facilities, urban settlements, industry and facilities with variable hydraulic load.
The device is entirely made of waterproof reinforced concrete, whereas compressed air supplied with the help of low pressure compressors is used to activate it. An aerial basin which stops all non-biodegradable waste is installed at the entrance to the bio-aeration tank, while at the same place it is also possible to install a vertical or slanted screw sieve. Mechanically treated raw wastewater, return activated sludge from the secondary clarifier and biomass from the bio-aeration tank flow into the tank for additional denitrification in which anoxic state occurs.
Biomass in the tank takes the oxygen from the nitrates (NO4) which creates new compounds, that is nitrates are converted into nitrites (NO3). The resulting nitrites are broken down into elemental oxygen and nitrogen in the gaseous state, which are released from the surface of the tank into the atmosphere in such form. In this way, nitrogen is removed from wastewater. Compressed air is blown into the wastewater through membrane aerators which create small bubbles. Fresh wastewater is thus mixed with fine air bubbles, and the oxygen from the air is dissolved in the water.
Activated sludge consisting of microorganisms (bacteria, algae, protozoa) is periodically transferred from the secondary clarifier into the aeration basin with the help of the air lift pump. Microorganisms need food and oxygen to survive and they take the food from wastewater (organic matter) and thus purify it, whereas they get the oxygen form the air blown into the water.
Such mixture of wastewater, air bubbles and microorganisms flows into the secondary clarifier where activated sludge is separated from the purified water which goes into the overflow section. After that activated sludge returns to the aeration basin for additional denitrification and the process is continuously renewed. Such clarified and purified water flows into the recipient.
The effluent water has less than 20 mg (BOD5)/l, which represents the degree of treatment greater than 95% of the degradation of the organic matter. Such result is achieved by dimensioning the aeration basin to a volume load less than 0.2 kg (BOD5)/m3,d, retaining water in the secondary clarifier for more than four hours and introducing oxygen of at least 2.5 kg O2/kg (BOD5). Such effluent water meets all requirements to be discharged into the natural recipient of category II or III.