Effluent rate (drip rate out of reactor): To tune the reactor for best performance you first need to set the effluent rate. I suggest adjusting the peristaltic dosing pump to deliver a slow drip rate of around 1 drop every 4 seconds (15 drops a minute). Once the reactor is set up the effluent rate can be increased to match the demand of the tank.
Internal reactor pH: Once the initial effluent rate has been set we need to look at the internal pH of the reactor and CO2 bubble rate. First, set the pH controller to switch the C02 supply solenoid off at a pH of 6.4. Using the needle controller, adjust the CO2 bubble count to around 30 bubbles per minute to begin with. Leave this for two hours then check the pH controller display, the pH inside the reactor should have dropped down to the desired pH i.e. 6.4. If you find the pH has not dropped sufficiently, slowly increase the
Effluent