In wastewater treatment the digestion of sludge produces a useful gas (carbon dioxide and methane), and consumes volatile solids. Assuming steady state conditions, let the feed solids be 4%, of which 60% are volatile solids, and the feed flow rate be 1 m/s. The gas, methane and carbon dioxide, contains no solids. The supernatant solids are 4%, with 40% being volatile, and the digested sludge is at a solids concentration of 3%, with 60% volatile.
In wastewater treatment the digestion of sludge produces a useful gas (carbon dioxide and methane), and consumes volatile solids. Assuming steady state conditions, let the feed solids be 4%, of which 60% are volatile solids, and the feed flow rate be 1 m/s. The gas, methane and carbon dioxide, contains no solids. The supernatant solids are 4%, with 40% being volatile, and the digested sludge is at a solids concentration of 3%, with 60% volatile.
Chapter2: Loads On Structures
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In wastewater treatment the digestion of sludge produces a useful gas (carbon dioxide and methane), and consumes volatile solids. Assuming steady state conditions, let the feed solids be 4%, of which 60% are volatile solids, and the feed flow rate be 1 m*/s. The gas, methane and carbon dioxide, contains no solids. The supernatant solids are 4%, with 40% being volatile, and the digested sludge is at a solids concentration of 3%, with 60% volatile. Gas Ce=0 Feed sludge C,=4%,Qs =? C, = 4% (60% vol.) (40% volatile) 0O, = 1 m¥sec < _ o _ Cy= 3%,Qo=? (60% volatile ) a3 15 the flow rate of supernatant Q in m*/min:- hala)
Transcribed Image Text:In wastewater treatment the digestion of sludge produces a useful gas (carbon dioxide
and methane), and consumes volatile solids. Assuming steady state conditions, let the
feed solids be 4%, of which 60% are volatile solids, and the feed flow rate be 1 m³/s.
The gas, methane and carbon dioxide, contains no solids. The supernatant solids are
4%, with 40% being volatile, and the digested sludge is at a solids concentration of
3%, with 60% volatile.
Gas
CG = 0
Production
Feed sludge
Supernatant
> C = 4% , Qs =?
(40% volatile)
or
C, = 4% (60% vol.)
consumption'
Qo = 1
m/sec
Digested sludge
Cp = 3% , Qo =?
(60% volatile )
häi 15
the flow rate of supernatant Q, in m³/min:-
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