Ammonia Emission Control for Liquid
Manure Storage Practices - Impermeable Covers
| Pro |
Con |
| Traps multiple gases, dust and odor |
Need replacing over time (5-10 yr) |
| Cost-efficient as a post excretion strategy |
Planning for snow load, wind effects |
Covering a manure storage area with an impermeable cover prevents
the release of gases into the atmosphere, and eliminates the effects
of wind and radiation on emission rates. Odor reduction efficiencies
of 70 to 85 percent have been observed when surfaces are completely
covered by impermeable covers. Although undocumented, ammonia reductions
may be similar. Polyethylene covers typically range in price from
$1.00 to $1.40 per square foot, installed. Wind and snow-load damage
present the greatest challenges with respect to implementation
and extended use of impermeable covers. Damage due to weather alters
the life of the cover and impacts the requirements for capital
investment over time. Many manufacturers list a useful life of
10 years for facilities constructed to prevent snow accumulation
on the cover, but do not provide any guarantee against wind damage.
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