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Mixing nanoparticles with swine manure to reduce hydrogen sulfide and ammonia emissions
Alvarado, A. C.; Predicala, B. Z. & Asis, D. A.
Abstract
Addition of nanoparticles into swine manure
was investigated as a possible measure to mitigate the
emissions of hydrogen sulfide and ammonia from swine
production facilities. Bench-scale experiments were conducted,
followed by room-scale tests in controlled environment
chambers closely representing actual swine
production rooms. Among the 12 types of commercial
nanoparticles tested, zinc oxide nanoparticles achieved
significant reduction in gaseous hydrogen sulfide and
ammonia concentrations when mixed into the manure at a
rate of 3 g zinc oxide nanoparticles per liter of manure
slurry. Room-scale experiments showed that mean initial
hydrogen sulfide concentrations of 596, 57 and 39 ppm
measured at the pit, animal and human levels within each
chamber, respectively, were reduced significantly to 5, 1
and 1 ppm, respectively, after the addition of zinc oxide
nanoparticles into the manure. Effectiveness of the treatment
was persistent in maintaining low hydrogen sulfide
level up to 15 days after treatment application. Pig performance
and manure nutrient properties were not adversely
affected by the application of zinc oxide nanoparticles.
Keywords
Environmental emission; Abatement; Zinc oxide; Nanoparticles; Swine
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