Municipal wastewater treatment plants (100 – 5000EO)

are used for wastewater with an inflow higher than 30 m3/day (200 EO)
are biological wastewater treatment plants with activated sludge in sublime
are systems with a discontinuous through-flow (SBR – sequenced batch reactor)

System with discontinuous flow (SBR):

This is technology with an interrupted operation which has been the subject of interest in recent years together with the development of microprocessor control devices. Compared with continuous through-flow treatment plants these water treatment plants do not have a final sedimentation tank.

The process of wastewater treatment is performed in one tank, due to interrupted operation. The total cleaning cycle is divided into several phases:

filling,
activation,
sedimentation,
decanting (emptying).

Individual phases can be modified and set in such a manner as to be best adapted to the inflow onto wastewater treatment plant.

Advantages of SBR:

managing of unbalanced inflows
high and stable quality of water on the outflow
lower operating costs compared with the similar systems
high flexibility
reliability
simplicity
lower demands for space compared with continuous systems
does not have a direct hydraulic connection between the inflow and the outflow

The TopolWater company has developed two basic modifications of the SBR system:

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The Need for Cleaner Water

It is proven scientifically that 85% of child sickness and 65% of adult diseases are produced by water-borne viruses, bacteria and intestinal protozoa such as Cryptosporidium and Giardia. Inappropriate water treatment can lead to heath problems – hepatitis B, tuberculosis, meningitis, typhoid fever, tricomoniasis, and cholera, glaucoma, gastrointestinal pain, salmonella, poliovirus, and diarrhea. In North America, E.coli O157:H7, an extremely dangerous strain of E.coli bacteria, infects more than 80,000 people annually. Fortunately, E.coli O157:H7 is easily inactivated by UV light.

Disinfecting your recycle water with ultraviolet light (UV) makes good sense. It’s environmentally safe, it’s well proven, and it’s the way of the future for water disinfection requirements around the globe.

The Process

Ultraviolet (UV) disinfection uses a UV light source, which is enclosed in a transparent protective sleeve. It is mounted so that water can pass through a flow chamber, and UV rays are admitted and absorbed into the stream. When ultraviolet energy is absorbed by the reproductive mechanisms of bacteria and viruses, the genetic material (DNA/RNA) is rearranged and they can no longer reproduce. They are therefore considered dead and the risk of disease has been eliminated.

UV-rays are energy-rich electromagnetic rays that are found in the natural spectrum of the sunlight. They are in the range of the invisible short wave light having a wavelength ranging from 100 to 400 nm (1 nanometer = 10-9m).

UV, like distillation, disinfects water without adding chemicals, and therefore possesses some of the same benefits as distillation. It does not create new chemical complexes, nor does it change the taste or odor of the water, and does not remove any beneficial minerals in the water.

Ultraviolet devices are most effective when the water has already been partially treated, and only the cleanest water passes through the UV flow chamber. TOPAS WWTP uses both a biological process and a sand filter to clean the water prior to passing it through the UV light, to provide complete water quality solutions. Ultraviolet light is a natural, cost effective, environmentally friendly disinfection process for use in homes where healthy water is a concern.