Ammonia Control for Animal
Housing Systems with Dry Manure - Barriers
| Pro |
Con |
| Prevents transmission of dust and any particles carried on the dust |
In some cases, may just change the shape and direction of the plume |
An alternative to filtering particles during
air movement is to stop the movement altogether. Windbreak walls
or air dams have proven effective in reducing downwind, dust particle
concentrations, and odor concentration. As a consequence of the
presence of impermeable barriers, one might expect a reduction
in ammonia concentrations. However, no scientific data is available
so far to support this argument. Windbreak walls have been constructed
with 10-ft ´ 10-ft pipe frames and tarpaulins, and placed
at the end of swine-finishing buildings, immediately downwind of
the exhaust fans. Downwind dust and odor concentrations were reduced
on demonstration facilities, in areas with windbreak walls, due
to plume deflection. The kind of material used for the barriers
(tarpaulins on a frame or solid wood, for example) will determine
the life of the barriers, which can be from a few years to decades
before replacement is needed.
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