GUIDE FOR CALIBRATING VALVES IN A TIM PLANT.

There are five categories of valves, described as follows:

1. Valve(s) A:Restrict the airflow to the air diffusers in the aerobic zone. This valve or group of valves (depending on your plant model) must remain completely open. When properly calibrated, you'll observe permanent and homogeneous aeration with visible fine bubbles in the aerobic zone.
2. Valve B:Regulates the coarse bubbling at the grate, which disintegrates toilet paper and fecal matter to form a homogeneous sludge that will be moved through the process. Its opening should be partial. The position of this valve is determined by opening it little by little until bubbling is observed in the area.
3. Valve C:Regulates sludge recirculation in the anoxic zone. This recirculation occurs via the pipe that emerges from the last compartment of this zone to the plant's inlet next to the grate. The opening of this valve should be partial. The position of this valve is determined by opening it gradually until sludge return is observed in the grate area.
4. Valve D:Regulates sludge recirculation from the bottom of the USBF separator cone to the aerobic and anoxic zones. The opening of this valve should be partial, and its exact position is determined by observing that the sludge return covers approximately half the diameter of the elbow at the end of the pipe.
5. Valve E:Regulates the bubbles that keep the clarified water outlet mesh clean. The opening of this valve is minimal. Its exact position is determined by achieving the formation and intermittent breaking of a bubble every 5 to 10 seconds.

TIM has prepared the following video with a complete explanation of the process: