4.3. Pollution control options for livestock waste:
a few cases in Asia. An economic assessment of
pollution control methods used by dairy cattle-raising
households in the North Vietnamese district of Gia
Lam was made by Nguyen (2004). The study found
that the pollution resulting from dairy cattle raising
increased with the scale of production, causing negative
impacts on the environment and health of both
people and animals. Among the available pollution
control options, biogas digesters were found to produce
the most positive economic and environmental
benefits. However, the expansion of the technology
faced difficulties. The main methods adopted to further
promote the biogas option were choosing the
appropriate pollution control technology for each
region, providing technical and financial support,
encouraging the installation of large-scale biogas
digesters at the commune level, and changing the behavior
of local residents i.e., moving them away from
traditional waste disposal methods (without pollution
control) towards biogas technology.
A study of environmental, health and other negative
effects of pig waste in the Philippine province of
Majayjay showed that the worst of these adverse
environmental effects were surface and ground
water contamination, air pollution from odors and
greenhouse gas emissions (Catelo, Dorado and Agbisi,
2001). The researchers found that the pollution
4.3. Pollution control options for livestock waste:
a few cases in Asia. An economic assessment of
pollution control methods used by dairy cattle-raising
households in the North Vietnamese district of Gia
Lam was made by Nguyen (2004). The study found
that the pollution resulting from dairy cattle raising
increased with the scale of production, causing negative
impacts on the environment and health of both
people and animals. Among the available pollution
control options, biogas digesters were found to produce
the most positive economic and environmental
benefits. However, the expansion of the technology
faced difficulties. The main methods adopted to further
promote the biogas option were choosing the
appropriate pollution control technology for each
region, providing technical and financial support,
encouraging the installation of large-scale biogas
digesters at the commune level, and changing the behavior
of local residents i.e., moving them away from
traditional waste disposal methods (without pollution
control) towards biogas technology.
A study of environmental, health and other negative
effects of pig waste in the Philippine province of
Majayjay showed that the worst of these adverse
environmental effects were surface and ground
water contamination, air pollution from odors and
greenhouse gas emissions (Catelo, Dorado and Agbisi,
2001). The researchers found that the pollution
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