The installation of a mechanical pre-treatment system upstream of the wastewater pumping extends the life of the pumps as water containing sand will thus not have to be pumped.

The primary material used for the construction of the components of the technology is stainless steel.

The final settling tanks (with a diameter of up to about 10 m) are designed using a vertical flow technology without the need for the classic raking device. This minimizes the escape of non-dissolved substances and reduces the cost of the technological components. If any repairs or maintenance are required, the complete technological elements can be removed while the plant is under full operational load - patent protected.

In the case of smaller-sized WWTP, one circular concrete tank is built containing only one final settling tank, which can serve two or more activation tanks. In this way, the problem of phase-type construction and/or the problem of large differences in inflow of contaminated waters to the treatment plant in different seasons can properly be solved - patent protected.

All of the technological components required for the biological treatment of the wastewater treatment are installed into two concentric concrete circular tanks. The built-up area of the site and, in particular, the construction costs for the WWTP are thus dramatically reduced - patent protected.

In the case of larger WWTP, two or more final circular settling tanks should be installed into a single circular concrete tank. In this way, the constructional costs and also the costs associated with the technological components of the system and the long-term operating costs are minimized, compared with the classic design approach to such a facility - patent protected.

With the requirement for high efficiency in the nitrification and denitrification, it is appropriate to again use a circulatory activation technology in the circular tank with the circular final settling tank installed in the center and completed with the sludge regeneration. The activation volumes necessary are thus reduced. In particular in the case of low inflows of contaminated water, it is possible to simply put the sludge regeneration out of operation and thus increase the mass load of sludge in the circulatory activation as in case of the two-line treatment plant - patent protected.

The automation of the function of pumping-off surplus sludge from the system of biological treatment plant will dramatically reduce the need for supervisory staff to attend the operation of the system. This is particularly applicable in the case of smaller treatment plants of up to 1,000 EI - patent protected.

A system of biological wastewater treatment using the UNIVERZAL type (patent protected) regeneration of sludge. The UNIVERZAL technology combines three generally well-known systems of activation: continuous plain activation with a final settling tank, the SBR activation system and the contactor-regenerator activation system or activation with sludge regeneration. In particular, this system has the effect of reducing the volume needed for the tanks, offers a dramatic simplification of the whole technological process and offers reduced costs for the technological part with its maintenance of a semi-continuous flow with high treatment efficiency.

Mechanically-stripped trash racks with a sand trap, including a hydraulic press and a raked material conveyor, the lowest price in a stainless version offering a long service life and the reliability of an hydraulic drive.

The floating fine-bubble aerating unit PAMP for aeration of the sludge pit and used in small, medium and large-sized WWTP.

Disinfection by means of ultraviolet radiation.

The greatest problem associated with the operation of a WWTP is the disposal of surplus sludge. In our SBH PROX type treatment plants, this problem is solved by dehydrating containers for surplus sludge - type OKX. These OKX type containers are suitable for small WWTP (100 to 5,000 EI). The disposal of the sludge in these containers is realized by means of sun light and a greenhouse effect with no requirements for direct energy inputs or professionally trained staff. Machine sludge dehydration by means of OKX reduces the volume of sludge to be removed by 80 to 90 % annually - patent protected. Belt presses or centrifuges are used for mechanical dehydration of sludge in WWTP above 5,000 EI.

Aeration utilizing the patent protected mechanical fine-bubble deep chamber turbine HKA.

Compared with the best fine-bubble aeration systems, the HKA aeration turbine for aerating biological wastewater treatment plants has the following advantages:

• Investment costs reduced by approximately 25%.
• A comparable consumption of energy and oxygen to be supplied to the tank.
• All of the technical equipment that is installed under the water level can be removed for possible maintenance and service while the plant is under full operating mode, without having to pump out the tanks .
• Simple and reliable operation, assembly, maintenance and service.
• Compared to fine-bubble systems, the costs for maintenance, operations and possible repairs are substantially reduced (several times multiple). Bearing replacement is assumed only once every 4 to 6 years. The equipment is effectively maintenance-free.
• Frequency converters are used for the regulation of the system and the mixing and aeration are done by a single device, in one activation tank (replaces the need for a stirrer).
• In addition, the turbine can be regulated quite simply - by switching on/off - as the turbine has a direct drive without a gearbox. Additionally, it doesn't require any additional special control device.
• The material used for the construction of the turbine - stainless steel - provides for a substantially longer service life compared with the rubber membrane of the fine-bubble systems.
• The HKA aeration turbine is of a vertical design; it is seated on three foundation bolts fixed to a bridge structure. The rotor in the bottom part of the turbine is formed of a central tube to which two arched wings are welded. Between the central tube and the wings, there is a space - chamber. After starting up the rotor, water does not remain in the chamber; under operating speeds, air flowing in will fill the chamber and penetrate by mixing down to the lower layers of the tank. An intense amount turbulence takes place in the chamber; very fine air bubbles thus created saturate the activation mixture with oxygen. The aerated water rises to the surface. The hydraulic process is provided for by a powerful stirrer at the rotor end.

dehydrating containers for surplus sludge – type OKX