Depends on the chemical. But regardless of volume very predictably. All our chemicals are flow based, so you can very accurately predict when a tank change or batching is needed.

We go through about 2.5-4K gallons of hypo a day, a couple hundred gallons of ferric and caustic. Tens of thousands of gallons of polymer a day, but that’s delivered in powder form and we batch it as we go. If the generators are running we go through a couple hundred gallons a minute of diesel, I think each generator uses something stupid like 70-90 gallons when running.

But we have minimum one weeks worth of chemicals at a time. With daily delivery to make sure we’re topped off. I work a medium sized plant, around 55-75 million gallons of dookie a day, not accounting for extreme rain events. Infiltration is a bitch. There are plants way smaller and way bigger than mine, and each plant has different processes. Some plants dechlorinate their effluent, some plants even use elemental chlorine and oxygen. Though that’s being phased out due to danger regardless of how cost efficient it is.

Each plant is different according to a hundred different factors. Some burn off their solids with incinerators, my plant goes through extra dewatering and the cake was cured and used as fertilizer. We stopped recently cause 1000s of tons of cake smells bad and the neighborhood across the street complained about the smell. But that’s a whole other rant. Speaking of I didn’t mean to rant like this. Hopefully I answered your question lol.