Hydrolysis acidification tank sludge production consider

Hydrolysis acidification tank sludge production generally consider like this:

Sludege calculation mainly two aspects: one is that the sludge cell growth generated; and inert sludge inlet water TSS generated.
1, The organic part of the sludge production
W1 = Yobs * (So – Se) * Q / 1000 * (1-η hydrolysis rate) = 50.4kg / d
Yobs: BOD5 apparent yield coefficient: Generally used for biological assimilation growth, generally for biological growth organics occupy about 1/3, can be considered to take 0.3-0.4kgVSS / kgBOD.
Sludge hydrolysis rate is about 30% -40%
2,The inert sludge part of the sludge production W2 = ηss * SSo * Q / 1000 = 37.5kg / d
inert components proportion of TSS total suspended solids ηss take 30-50%, 45-50% hydrolyzed removed in addition, about 10-20% of water.
Note: The former is an organic part of the sludge production, and latter usually there is no inert part in total suspended solids, the organic portion is biochemical out, forming a completely inert sludge.
Activated sludge output W ‘= W1 / fvss + W2 = 72 + 37.5 = 109.5kg / d: fvss: is the organic part quality proportion in the sludge, generally between 0.7-0.8.