Process Design

The following equations show the design of an extended-aeration process without nitrification and with zero-sludge yield (Ramalho 1983):

where:

Y = sludge yield Q = influent flow rate, l/day Si = influent BOD, mg/l Se = effluent BOD, mg/l kd = sludge decay (endogenous respiration) rate, l/day X = MLVSS concentration in the aeration basin, mg/l V = basin volume, l 0 = LRT, day

These equations incorporate 0.77 since approximately 77% of the sludge produced is biodegradable. The recycling ratio (r) is calculated as follows:

where Xr = MLVSS concentration in the recycled sludge flow, mg/l.

Waste Management And Control

Waste Management And Control

Get All The Support And Guidance You Need To Be A Success At Understanding Waste Management. This Book Is One Of The Most Valuable Resources In The World When It Comes To The Truth about Environment, Waste and Landfills.

Get My Free Ebook


Post a comment