Wastewater treatment plants for single-family homes

摘要

This invention refers to a waste water purifying plant for a one family house comprising a reaction tank (1) to which waste water is pumped batchwise from a collection tank (2), which reaction tank (1) is provided with means (8, 17, 18) for aerating waste water fed to the reaction tank (1), means (9) for feeding precipitation chemicals to said waste water, and means (19, 20) for removing purified water from the reaction tank (1). The invention is characterized in that the reaction tank (1) is a lightweight structure with a substantially cylindrical mantle manufactured by spirally winding a hollow thermoplastics profile, which reaction tank (1) by means of a hanging floor (5) is divided into an upper dry chamber (6) for necessary process equipment and a lower liquid chamber (7), said reaction chamber (1) being dimensioned for a batchwise purifying process with a liquid chamber (7) holding slightly more than two batches waste water having a liquid depth giving an aeration height of at least two metres.