Small-scale wastewater purification plant, comprises inlet, sludge storage for pre-clarification of the waste water, aeration basin for sequential clarification of the water, discharge pipe for pure water, and a supply device

摘要

The small scale wastewater purification plant comprises a supply device (5) for feeding aeration basin (3) with required from the sludge storage (2), a lift-up discharge set-up for discharging pure water formed in the aeration basin through the discharge pipe, sampling container arranged in flow direction between the lift-up discharge set-up and the discharge pipe for discharging the pure water out of the aeration basin, and an emergency discharge pipe (8) attached to the sampling container. The lift-up discharge set-up (6) exhibits feed pipe. The small scale wastewater purification plant comprises a supply device (5) for feeding aeration basin (3) with required from the sludge storage (2), a lift-up discharge set-up for discharging pure water formed in the aeration basin through the discharge pipe, sampling container arranged in flow direction between the lift-up discharge set-up and the discharge pipe for discharging the pure water out of the aeration basin, and an emergency discharge pipe (8) attached to the sampling container. The lift-up discharge set-up (6) exhibits feed pipe. The supply device is a feed lift-up mechanism with a feed pipe. The feed pipes form a deepest point with U-shaped pipe in the flow direction and exhibit a compressed air supply opposite to the flow direction. A non-reverse flow device is arranged in the emergency discharge pipe before the compressed air supply and is intended at inlet of the feed pipe of the discharge set-up, which is arranged at a height of a minimum water level (WB min) in the aeration basin (3). The feed pipe of the discharge set-up flows into the discharge pipe (4) on height of a maximum emergency water level (WN). The inlet opening of the feed pipe of the feed lift-up mechanism is arranged at a height of the minimum water level (WS min) of the sludge storage. The sludge storage area is shielded from the remaining sludge storage by a dip wall (55) that is hydraulically closed between a range above the maximum water (WS max) and below the minimum water level (WS min) of the sludge storage. The dip wall is composed of a foil or a dip tube section attached to wall of the sludge storage. The non-reverse flow device is a flow-direction sensitive shut-off valve with rubber flaps and exhibits a threshold resistance (R) through an elastic tension of the shut-off valves after which reverse flow valve opens.