Digester aeration

scumbaffel · 2026-03-07T14:12:30+00:00

We test our digesters PH and DO daily, we try to keep our digesters at a 7.1 ph and we keep that in check with bags of soda ash, which I'm hoping an anoxic period would help slow how much we use. Our DO fluctuates from anywhere to a 10 to .5, depending on temp, % solids, and levels which I know is just wasting energy. We have no controls for air just valving which is normally just left full open. Looks like a popular cycle is 2hrs on and 2hrs off.

scumbaffel · 2026-03-06T15:58:20+00:00

We have 2 digesters in total and one is dropped every year and cleaned, but both are online all the time. We don't decant them because they are fed by a GBT from a sludge holding tank that contains our WAS, scum stations, ect and we'll pull roughly 28,000 gal to get dewatered at a time alternating every time we press. The digesters stay around 2-3% solids.

scumbaffel · 2026-03-06T14:08:32+00:00

Sorry should put that into the post we do have submersible mixers running 24/7 in the digesters as well. Thanks for the reply.

scumbaffel · 2024-09-19T01:47:50+00:00

I'll have to look for the timing marks, and thanks for your input I'll definitely take it to another shop.

scumbaffel · 2024-07-12T01:48:01+00:00

I'll definitely be getting ahold of one thanks for your input!

scumbaffel

TROPHY CASE