Either of the two will allow us to stabilize our pH readings, which in turn will result in a more even disbursement. The temperature would be very difficult to control. The settling ponds as well as the large post-treatment pond are both outdoors. It would be cost prohibitive and unsightly to have huge domes covering the ponds. The chlorine input could be much better controlled and is a much better solution.
Chlorine is fed into the water in gaseous form.
One valve adjusts the amount of Chlorine sent into the water. This valve is manually adjusted by the plant operator every few days after the pH and residual Chlorine tests are done. Chlorine content continuously and make small electronic adjustments to the amount of Chlorine going into the water for treatment. Initially, it may be a somewhat formidable and costly task to develop an electronic system which would be able to monitor so many complex variables. If, however, very strict controls were desired, this method would work.