H2S
Control for Dry 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. Although documented effectiveness
for reducing hydrogen sulfide emissions is not available, impermeable
covers are used to block any gas transfer, suggesting that emission
reductions should be high and similar to those observed with odor
(70 to 85 percent). 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 of the extended use of impermeable covers.
Damage due to weather alters the life of the cover, impacting the
capital investment required over time. Many manufacturers list
a useful life of 10 years for storage areas constructed to prevent
snow accumulation on the cover, but do not provide any guarantee
against wind damage.
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