TREATMENT PROCESS

1. Affluent water comes through a stainless steel separator in which rough and floating impurities are separated, and then washed with treated water. Rakes are dewatered by pressing, and removed to a large-capacity container. In the area itself mineral impurities (sand and fine grit) are separated, and then removed to the sand container. 
   The complete unit - washing, aeration and transport of separated portion - is controlled by processor unit. 
   Redundancy (for the event of drop-out) is provided with a stainless drum filter, which stays during normal conditions in stand-by mode.

2. Next, water flows into multistage (3 or 4 stages) aerobic selector of which task is to suppress the growth of fibre-form bacteria which can cause the washing out of the part of activated sludge (so called biological foaming in secondary settling tanks of waste water treatment plants).

3. Waste water coming into the selector is mixed with aerobically "regenerated" sludge that is pumped from the bottom of the secondary settling tank by means of controlled pump. The following aerobic regeneration improves physiological properties of activated sludge to be in good condition for further treatment process.

4. Then, the mixture of waste water and treatment culture flows into the denitrification area, where in anoxic environment (i.e. the environment in which the only source of oxygen is the oxygen contained in nitrates) and along with sufficient proportion of biologically easily decomposable pollution the biological denitrification is performed. The whole denitrification area is stirred, and in case the temperature falls under 10^oC it is equipped with aeration diffusers.

5. Then, the main stream flows into the activation area which is considered the "heart" of the biological water treatment. The activation area has in advance calculated capacity of biological filters (honeycomb plastic carriers of biomass) which are regenerated in regular intervals. The combination of activated sludge and sessile bio-culture possesses a lot of technological advantages of which the higher concentration of treating culture is the most important as it provides the process with stability in case of material or hydraulic shocks as well as proven very high treating effect.
   The activation area is provided with aeration stainless steel distribution system and silicone diffusers. That provides the system with a log service life and especially with high air-oxygen transfer into activation compounds, which results in lower energy requirements.
   The big advantage of these waste water treatment plans is their design which enables flexible changes of operating mode, i.e. to switch between one or two stage operating mode. It is a unique technology that among other things benefits from the advantage of division of dominant bio-culture in activated sludge. Mainly bacterial bio-culture of the first stage is subsequently exchanged by mainly protozoa activated sludge. This type of treating process (in consequence of and depending on organic loading) has many advantages compared to "classic" one-stage processes without integrated carriers. Nevertheless, this technology can be easily operated as one stage while no "classic" water treatment plant can be operated in two-stage or combined mode without costly reconstruction. Accurate oxygen ratio and sludge removing are controlled by the computer through a series of sensors.

6. Surplus of activated sludge is transferred into the area of aerobic stabilization (central part) from where it is led to the machined dewatering while the water is recycled back to the inlet of the water treatment plant.

7. Water from secondary settling tanks runs out through micro-screen which is able to eliminate dispersed particles bigger than 17 microns. The separated part is returned back to the area of aerobic stabilization.
   Thus treated water runs through the area of continuous tertiary filters into the final disinfection area.

8. Hygienisation itself is performed with chlorine dioxide. This proven and the most advanced disinfection process is in present perhaps the only and the most recommended way of disinfection of treated waters.

9. Automatic analysers monitor the quality of drained water and record basic characteristics in intervals set in advance. Data archival and instant visual checking of main nodal points is ensured by means of five cameras through the eternet bus to the monitoring and control station.
   An automatic control system enables intervention into the automatic process and controls every electrically controlled device. The automatic control system follows operation status, visualises them for the operator, and in case of failure puts in operation reserve systems. Data and information are further distributed by GSM net or throughout internet.
   The control system serves also as a protection facility.
   
   So we introduce the modern concept of fully automated technology which guarantees attainment of all required parameters while ensuring minimum level of investment and operating requirements.