The Ostrava Water and Sewerage Company uses an innovative method for the cleaning of their wells
After last year’s pilot testing of the unique Hydropuls technology, this year the Ostrava Water and Sewerage Company (OVAK) uses this innovative method for the cleaning of 7 wells in its well-spring in Ostrava-Nová Ves and Ostrava-Dubí.
What is the Hydropuls method? The number of drinking water sources has been decreasing lately. It is very important to maximize care for existing sources, with the emphasis on using modern, environmentally friendly methods. Hydropuls is such a method.
The basic principle of impulse generation by the rapid expansion of highly compressed gas or liquid has been in use since the early 1950s for various purposes, both in seismic exploration and oil exploration. In the early 1990s, the first modulation of the pulse technology was developed for use as a well-regeneration method.
The principle of action consists in the effects of a pressure pulse being produced by means of gas or water doses pulsating under high pressure supplied using a pulse generator embedded in the well by a pressure hose. The pulse generator is equipped with a valve system which, during a short switching time (milliseconds), is able to release the energy stored in the generator in the form of gas or water under high pressure, resulting in hydraulic shock waves. At the same time, due to sudden volume changes, a cavitation effect (cavitation) results in a “vacuum bubble” which subsequently collapses and creates a hydraulic suction wave”.
The alternating effect of load and pressure relief results in the release of fine-grained, ferrous and manganic elements, sinters, etc. deposited in gravel pits and in the porous parts of the aquifer. The loose silt is transported by the “suction wave” to the centre of the well where it is drained.
This method is approved according to DVGW (German Association for Gas and Water) – Document W 130.