(D) Sludge recycling
The recycling ratio (r) can be computed as follows:
where Xr = MLVSS in the recyolcd effluent = 0.8 x (10,000 - 5000) (mg/L)
Hence the recycling flow=0.5 Ç=0.5x1710 (m3/day)=855 m3/day. (E) Sludge production
(i) Net VSS production=Xy/ 6C
0.S x 5000 (mg/L) x JO * (kg/mg) x 1377.5 (m3) x 10* (L/m7)
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