An anaerobic digester for PS and WAS in a WWTP, air-lift with sewage gas injection below the draft tube - are there better sparger designs than just an open pipe end?
AFAIK air lift pumps are more efficient with smaller bubble sizes (to a point the higher pressure loss is offset by better entraining of the fluid), however with a sludge apiclate there's the very real possibility of fouling of small pores on spargers. Are there successful sparger designs fo this application?
Note that in other air-lift reactors, transport phenomena between gas and liquid phase play a big role so bubble size is an important consideration - this is not the case here.
AFAIK air lift pumps are more efficient with smaller bubble sizes (to a point the higher pressure loss is offset by better entraining of the fluid), however with a sludge apiclate there's the very real possibility of fouling of small pores on spargers. Are there successful sparger designs fo this application?
Note that in other air-lift reactors, transport phenomena between gas and liquid phase play a big role so bubble size is an important consideration - this is not the case here.