Installation for biological waste water purification.

摘要

The invention relates to an installation for the biological purification of waste water (effluent), where, essentially, plants having a strong root system are used in the filter tank and, furthermore, additional tanks are used as stilling tanks and settling tanks. An essential aspect of the invention is the readiness for service even in periods of frost; in frost-free periods the waste water is fed to a tank with a vertical flow pattern on the surface, while at times of frost it is fed distributed through a network of pipes under the surface on a layer of gravel.