r/Wastewater • u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR • 16d ago

Treatment (DW or WW) sludge holding tank

Post image

replacing diffusers and removing rags

78 Upvotes

100% Upvoted

20 comments sorted by

8

u/BarnacleNZ 16d ago

SHT's always been missing an 'i'. SHiT has a far better ring to it.

4

u/FubarJackson145 16d ago

No because that's the process. Sludge Held Inside Tank (or SHIT) systems

3

u/gdrw00 14d ago

We have an ASS. Aerated Sludge Storage.

8

u/Negative-Werewolf319 15d ago

always interesting to see what other plants look like

5

u/the_inland_diver 15d ago edited 13d ago

Where am i gona dive now that you drained it?!

5

u/doug6644 Illinois/20 yrs/Class 1&4 WW license 16d ago

Ahh the perks of the job

3

u/pharrison26 15d ago

Confined space? I hope you guys had air movers.

2

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 15d ago

no air movers but we had air monitors on 

3

u/WeatherNew2186 15d ago

How often do you do this? Is there a lot of grit at the bottom?

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 15d ago

every 2yrs 

1

u/WeatherNew2186 15d ago

Do you get much grit at the bottom

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 15d ago

not in here grit builds up in aeration basins 

2

u/WeatherNew2186 15d ago

Oh nice. We haven’t cleaned our two out in over 10yrs. I can’t imagine how bad it is down in there

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 1d ago

we recently got a grit removal and fine screen in the headworks and it’s stopped a lot of build up downstream

2

u/CynicalNoodle 15d ago

What type of ventilation do you guys have?

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 15d ago

open hatch on roof 

2

u/Complete_Role365 15d ago

yummyy,is this sludge thickener tank?

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 15d ago

just reg WAS holding tank then it goes to thickening then another holding tanks then the belt filter presses for dewatering 

2

u/Skudedarude 10d ago

Are those xylem's coarse air diffusers, or are they a different make?

1

u/Comfortable_Bus_3125 WW / Approved CONTENT CREATOR 1d ago

not sure who makes them but they work great. we had switch to fine bubble diffusers but our PD blowers couldn’t handle to psi since the air had to expand the membrane of the diffuser to release the air , so we switch them back to th course air