Biological clarifying device

摘要

Biological clarifying device (10) comprises: devices comprising a clarification chamber (16), devices for transport and treatment of waste water, a pneumatic regulator (30) with a riser pipe (36), whose lower end has a compressed air connection (46) and the upper end is connected to a clear liquid outlet, an aerator, and a compressed air source for supplying the compressed air regulator. The aerator with compressed air leads via a compressed air line which branches from compressed air source into a first branch line and a second branch line. Biological clarifying device (10) comprises: devices comprising a clarification chamber (16), devices for transport and treatment of waste water, a pneumatic regulator (30) with a riser pipe (36), whose lower end has a compressed air connection (46) and the upper end is connected to a clear liquid outlet, an aerator, and a compressed air source for supplying the compressed air regulator. The aerator with compressed air leads via a compressed air line which branches from compressed air source into a first branch line and a second branch line, where the first branch line leads to the pressure connection of the compressed air regulator, and the second branch line leads to the aerator. The devices further comprise: a float valve, which is floating in the clarification chamber for controlling the distribution of the air flow of the compressed air line, where float valve is arranged on the first and/or the second branch line, and includes a hollow body and a valve body, which is movably mounted between a first and a second switching position in the hollow body, and comprises an inlet through which the hollow body is acted upon with compressed air; at least one output, which is connected to the compressed air source via at least a portion of the first branch line, and has a valve seat, which is closed by the valve body in the second switching position, and opened in the first switching position, and hollow body is tiltably arranged about an axis, depending on the liquid level of the clarification chamber such that it reaches a predetermined level exceeding in a tilt angle at which the valve body can move from the second switching position into the first switching position; and an electrical switch, which upon opening of the first branch line and/or during insertion of the conveyance of liquid from the upper end of the riser pipe, changes its switching state and generates a switching pulse for controlling the compressed air source. An independent claim is also included for operating the biological clarifying device, comprising intermittently running the compressed air source in a first operating phase, blocking the first branch line and opening the second branch line when a filling level of the clarification chamber is below a predetermined level, and releasing the first branch line for pressurizing the compressed air regulator, where the compressed air source terminates the first operating phase and begins a second operating phase, which comprises at least a period of continuous operation of the compressed air source.