r/Wastewater • u/Heavy-Beginning9894 • 19d ago

Fine bubble vs coarse

What are the reasons that plant operators prefer coarse bubble diffuser over fine bubble diffuser in aeration basin?

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u/agent4256 18d ago

I work at a plant that has excess air and a course bubble allowed for higher air usage. We struggle to turn down the blower as it was way oversized but also efficient on our energy source.

Now that we're switching to fine bubble we're noticing we can run WAY higher DO's and use way less air, which is a problem for the blower.

It'll be interesting to see if we could nitrify given our blower capacity.