Laboratory, semi-pilot and room scale study of nitrite and molybdate mediated control of H(2)S emission from swine manure.
The effects of manure age on emission of H(2)S and required level of nitrite or molybdate to control these emissions were investigated in the present work. Molybdate mediated control of H(2)S emission was also studied in semi-pilot scale open systems, and in specifically designed chambers which simulated swine production rooms. With fresh 1-, 3- and 6-month old manures average H(2)S concentration in the headspace gas of the closed systems were 4856+/-460, 3431+/-208, 1037+/-98 ppm and non-detectable, respectively. Moreover, the level of nitrite or molybdate required to control the emission of H(2)S decreased as manure age increased. In the semi-pilot scale open system and chambers, average H(2)S concentration at the surface of agitated fresh manure were 831+/-26 and 88.4+/-5.7 ppm, respectively. Furthermore, 0.1-0.25 mM molybdate was sufficient to control the emission of H(2)S. A cost study for an average size swine operation showed that the cost of treatment with molybdate was less than 1% of the overall production cost for each market hog.
Moreno
Lyman
L
Prairie Swine Centre Inc., Saskatoon, SK, Canada S7H 5N9.
Predicala
Bernardo
B
Nemati
Mehdi
M
D000393:Air Pollutants / Q000032:analysis*; D000818:Animals; D006862:Hydrogen Sulfide / Q000032:analysis*; D007753:Laboratories; D008372:Manure / Q000032:analysis*; D008982:Molybdenum / Q000737:chemistry*; D009573:Nitrites / Q000737:chemistry*; D010865:Pilot Projects; D013552:Swine; D013997:Time Factors
D000393:Air Pollutants; D008372:Manure; D009573:Nitrites; C044659:molybdate; D008982:Molybdenum; D006862:Hydrogen Sulfide