Table 12
Wastewater Stabilization Lagoons
Typical
Typical Loading
Detention
Typical
Lagoon Type
Application
Parameters
Times
Dimensions
Comments
Facultative
Raw municipal
15-100 lb BOD5/ac/d
25-180 d
4-8 ft
Most commonly used
wastewater
(17-110 kg BOD5/ha/d)
(1.2-2.5 m)
waste stabilization
deep
pond type
Effluent from
May be aerobic
trickling filters,
through entire
aerated ponds, or
depth if lightly
anaerobic ponds
loaded
Aerated
Industrial wastes
6-20 lb BOD5/1,000
7-20 d
6-20 ft
Use may range from
cu ft/d
(2-6 m) deep
a supplement of
Overloaded
(100-320 kg BOD5/1,000
photosynthesis to
facultative ponds
cu m/d)
an extended
Situations where
aeration activated
limited land area
sludge process
is available
Requires less land
area than
facultative
Aerobic
Generally used to
75-150 lb BOD5/ac/d
5-20 d
1-1.5 ft
Application limited
treat effluent
(85-170 kg BOD5/ha/d)
(30-45 cm
because of effluent
from other
deep)
quality
processes;
Maximizes algae
produces effluent
production and--if
low in soluble
algae is harvested--
BOD5 and high in
nutrient removal
algae solids
High loadings
reduce land
requirements
Anaerobic
Industrial wastes
10-50 lb BOD5/1,000
20-50 d
8-16 ft
Odor usually a
cu ft/d
(2.5-5 m)
problem
(160-800 kg BOD5/1,000
deep
Subsequent
cu m/d)
treatment normally
required
Previous Page
