Process of treatment:

Waste water flow into the equalization basin, which at the same time functions as the 1^st activating step. In this case coarse pre-cleaning is not necessary. For SDU of smaller capacities up to EO 300 the equalization basin also functions as a storage tank ofexcessive sediments from activation. With larger systems it is usual to set up an individual ventilated sediment trap.
From the equalization basin the pre-cleaned water is pumped into the SBR reactor. When the reactor is full to the maximum level the computer switches off the pump for uncleaned water and the aerating phase begins. During the aerating phase the equalization basin is also aerated. After aerating is completed the system comes to a rest and the sludge settles. Then the clean water pump draws off the cleaned water to the pre-set minimal level. This is the impulse for further pumping into the reactor and the cycle is repeated. The system meters the period from the last blowing and if it oversteps the pre-set period a short-term aeration is performed to preserve activation of sludge. This is essential especially if the waste water flow is insufficient.
If the waste water flow is increased ie. when the critical water level is reached in the equalization basin, the system reacts by pumping a larger amount of cleaned water, than is usual in the current cycle, into the outflow. The reactor then subsequently fills up to 70% of its volume. This will significantly increase the hydraulic capacity of the system. If continual monitoring of the level in the equalization basin (by pressure probe) is installed it is possible to regulate the amount of clean water pumped continually. This is usually realized in systems over 300 EO.
The optimal amount of activated sediment in the SBR reactor is automatically maintained by a sludge pump. After each cycle a determined layer of cleaned water with sediment is pumped either into the equalization basin or into an individual sediment trap. In a system with an individual sediment trap the optimal amount of sludge in the equalization basin is regulated in a similar way by means of the SBP reactor.
Denitrification can be ensured by three methods, or a combination of all three together. After completion of the activation phase it is possible to set the post denitrification phase with agitation or possibly with addition of substrate from the accumulating tank. The second method leaves a substantial amount of the cleaned water in the reactor - it is not pumped into the outflow - and is denitrified during the phase of filling together with agitation. In the third method part of the cleaned water is pumped together with surplus sediment into the accumulating tank and then during the phase of filling is pumped back into the reactor. The combination of all three possibilities is the most advantageous.


Advantages of wwtp MONOBLOK-T:

- High quality of treated water - if the tanks have enough volumes then BOD5 value is approx. 5 mg/l and nitrification, denitrification and partial biological phosphorus removal processes are ensured.

- Fully automatic operation with a remote control. It allows to control a number of waste water treatment plants from one dispatching centre with minimal maintenance costs. By this means it is also possible to essentially reduce purchase costs for sewerage system in comparison with a system of one central waste water treatment plant with long sewerage system and pumping stations. However required safety of operation and high treatment efficiency are ensured at the same level as in big central waste water treatment plants.

- Because of high adaptability of the system the waste water treatment plant can be put into operation even before building up of the sewerage system. In that case the wwtp serves for treatment of wastewater supplied by cesspool emptiers.   

- Wwtp MONOBLOK-T is also suitable to treat industrial wastewater which are biologically treatable.

- Low investment costs.

- Low maintenance costs - the whole operation of wwtp is fully automatic and does not require any special training of operating personell. In the case of remote control of wwtp a daily check of operation is not required as well.


This product has the Technical Agreement No. 020-05/303 – 2004 issued by Permanent Technical Council for Civil Engineering.