GIẢM SỰ KHÍ AMMONIA TỪ CHUỒNG HEO BẰNG CÁCH SỬ DỤNG BÙN HIẾU KHÍ CŨNG NHƯ SỰ TUẦN HOÀN CHẤT LỎNG
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Liwslock Pruduclion Science, 3 I (1992) 121-<br />
Elscvier Science Publishem, B.V ., Amsterdam<br />
132 121<br />
Reduction of ammonia volatilization from pig<br />
houses using aerated slurry as recirculation liquid<br />
This paper describes the results obtained from a pilot plant research into Ihe reduction of ammonia<br />
emission from pig houses. The slurry of 240 fattening pigs was separated and treated aerobically, thus<br />
Croviding ammonia free liquid. The Iiql;id was used as recirculation water lo remove fresh slurry from<br />
the pig house. Three systems for removing the slurry were tested. In IWO uf these systems the fresh<br />
slurry was diluted by cokcling it in a layer of recirculation (flushing) liquid. The dilured slurry was<br />
removed from the pig houw 1 10 4 times per day. The ammoniz emissions from Ihe three pig unils<br />
wills the slurry removal systems were compared with the em&Ions from 1wo control units.<br />
The rcsJts show a maximum reduction of ammonia emission from the treated uni;s of 7G% comp3red<br />
to the control unil wirh fully slatted floors, measured over a vriod of 280 days. !% differewes<br />
were measured in the performance uf the animals.<br />
Ke.c’+vurds: pig houses; ammonia volatilizaGon; aeration; slurr,~ removai.<br />
IN-l-RODUCTlON<br />
?‘he ammonia volatilization from. animal husbarldq contributes by about<br />
30% to the acidification in the Netherlands (Asman and Van Jaarsveld, 1986).<br />
Approximately 25% of the ammonia originates from pig farming (reference<br />
year 1986). The gouvernmcnt has state& that the ammonia emission. compared<br />
to 1980, has to be reduced with 70% in the year 2000 (Anonymous,<br />
1990). Ammonia vaporizes from pig slurry on the pen floor, during slurry<br />
storage inside and outside the building and af’ter lagd spreading.<br />
Reduction of ammonia emission can be achieved by processing the slurry.<br />
by technical measures with respect to housing, storage and spreading and b,<br />
optimizing ?ht: composition of the fodder. The addition to the fodder of certain<br />
enzymes which improve the utilization of proteins and the use of synthetic<br />
amino acids. will reduce the excretion of nitrrigen in the slurry (Jongbleed,<br />
199 1 ). The emission from land application is reduced conklerabl~~ if<br />
0301-52L6/92/SOS.O0 g:: 1992 EIsebier Science Publishcls B.V. .G fitits rtiried.
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