Geoscience Reference
In-Depth Information
Solution:
(
)
×
(
)
+
Biosolids(lb/day)%Moi
×
st. 100
Compost(lb/day)%Moist. 100
%Moisture
of mixture
=
Biosolids(lb/day)Compost(lb/day)
+
5000 lb/day
×
(75 100)
+
2000 lb/day
×
(30 100)
=
5000 lb/day
+
2000 lb/day
3750 lb/day 600 lb/day
7000 lb/day
+
=
= 62%
24.14.5.2.2 Compost Site Capacity Calculation
An important consideration in compost operation is the solids processing capability (fill time),
expressed in lb/day or lb/wk. Equation 24.169 is used to calculate site capacity:
3
)
Totalavailable capacity (yd
Fill time days
=
(24.169)
Wet compost(lb/day)
Compost bulkdensity (lb/yd )
3
■
EXAMPLE 24.137
Problem:
A composting facility has an available capacity of 7600 yd
3
. If the composting cycle is
21 days, how many lb/day wet compost can be processed by this facility? Assume a compost bulk
density of 900 lb/yd
3
.
Solution:
3
)
3
Totalavailable capacity (yd
yd
lb/day
900 lb/yd
7600
x
Fill time
(days)
=
=
Wet compost(lb/day)
Compost bulkdensity (lb/yd)
3
3
3
3
7600 yd
900 lb/yd
lb/day
×
21 days
=
x
3
3
7600 yd 900 lb/yd
21 days
×
x
lb/
day
=
6,8
40,000 lb
21 days
x
lb/day
=
=
325,714lb/day
24.15
WASTEWATER LABORATORY CALCULATIONS
24.15.1 W
asteWater
l
ab
Waterworks and wastewater treatment plants are sized to meet current needs, as well as those of the
future. No matter the size of the treatment plant, some space or area within the plant is designated
as the lab area, which can range from being the size of a closet to being fully equipped and staffed
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