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- Leak detection
- Water sustainability
- Oil storage maintenance & compliance
- Drainage & interceptor maintenance
- Flood defence
First stage – preliminary (anaerobic) treatment inside the septic tank. Separation of the light substances (oil, fat) from heavy ones, that fall on the bottom of the tank, creating sediment.
Second stage – biological treatment (aerobic) with filtration depot (drainage, filtration deposit).
Sewage from the septic tank flows through the filter into the distribution well which is connected to the drainage system laid on sub-crust made of washed gravel fraction 16-32 mm.
From the upper side the drainage is covered with geotextile which stop the sand and therefore allows the filtration of rainwater. Through this process a biological coating is created allowing the after-treatment of sewage.
60% after the first stage – 90% after the second stage