Small domestic wastewater treatment plants (WWTPs) are designed for biological-mechanical treatment of municipal wastewater. Biological wastewater treatment plants enable septic tank or cesspool replacement, therefore, they are most often used for the treatment of sewage water from family houses, guesthouses or cottages. The AS-VARIOcomp K home water purifier is the most suitable for the family home, with its main advantages being minimal operating costs and fast return on investment.

As in other industries, if you want to find a professional solution, the most effective one is probably not going to be a one-size-fits-all solution.

That is why we are ready to provide you with a complete professional implementation service. 

AS-MONOcomp – technology description

The wastewater flows through the influent basket into the influent part of the SBR reactor of the WWTP, where the influent is calmed and mechanical impurities are partially separated. The effluent in the SBR reactor is subject to a treatment process that uses a controlled treatment cycle that takes place during the day and alternates between aeration, sedimentation, flushing, effluent and sludging phases. During the aeration phase, the tank is filled and aerobic cleaning processes take place simultaneously. The floating micro-organisms clustered in flakes remove organic pollution by aerobic degradation and convert it into biomass. Sedimentation of the flakes is ensured by creating an interface between the activated sludge and the treated water. Flushing prevents unwanted dissolved solids from being carried down the drain. The treated water is then drained into a drainage trough. Excess sludge generated in the WWTP is eventually pumped to a dewatering facility for sludge stabilisation and subsequent disposal.

The wastewater flows into the settling area (A) of the influent part of the WWTP, where it is stripped of mechanical floating and settling substances, which are further subjected to anaerobic decomposition. From the settling area, the mechanically pre-treated water flows through the overflow into the activation area (B).

The activation area (B) is used for biological treatment of wastewater. This space is equipped with a fine-bubble aeration system at the bottom, into which air is blown by a blower, and possibly a biomass carrier (C) to improve the stability of the process of an overloaded or underloaded WWTP. The advantage of the solution is the accumulation space (D) in the entire area of the treatment plant, which is designed to accumulate wastewater and to ensure the uniformity of the outflow from the treatment plant. The activated mixture from the activation flows into the vertical settling tank (E), from where the treated water is then drawn off through the mammoth (F) into the outlet trough. Excess aerobically stabilised sludge is drawn off by means of a mammoth to the settling and sludge compartment (A) as required.

The treatment plant has undergone an additional verification test of efficiency under the supervision of the “Technical and Testing Institute of Construction Prague, s.p.”. During the test, the basic efficiency parameters including ammonia and phosphorus were verified, thus proving compliance with the requirements of National Decree No. 57/2016 Coll., “on indicators and values of permissible pollution of wastewater and the requirements for the permit for the discharge of wastewater into groundwater”. The values measured in the original type test measurement and the values of the additional verification test show that the WWTP can be used:

• for the water permit procedure – also for discharge to groundwater – see guaranteed values,

• for notification – as a Class I WWTP.

The water treatment plant is installed in an excavation pit on a concrete base plate (concrete encasement is not necessary), connection by joining pipes to the sewer system and air connection from a blower that is placed outside the water treatment plant. Setting of individual functions is done by the manufacturer; except for the connection of the blower in the socket, the water treatment plant does not require any additional wiring works. Commissioning of the water treatment plant is done by the supplier of an authorised servicing company. Owing to the dimensions and the weight, the types for 5 and 8 EO are transportable by a trailer; placement in an excavation pit is possible without a crane.