Dear all
Previously, my plant was using floating aerators for aeration. The results were satisfactory. However, as a cost saving initiative, those aerators were replaced with fine bubble diffusers which were claimed to consume less energy than the aerators.
The air is provided by two blowers with each 45 kW and 30 m3 per min air flow capacity. The air is however very hot, measured at least 84 deg.C in the supply pipe. You cannot touch the pipes, they are very hot. If you pour water on the pipe, some steam will form. The results of the treatment are bad, with few parameters were off target, not like those results when using aerators.
We are planning to reuse the aerators to improve the results, or install an aftercooler to cool down the air. I suspect that hot air is the culprit. My questions are:
1. Can hot air kills bacteria in the water?
2. Does hot air provides less oxygen?
Thanks and best regards.
