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In recent years, with the vigorous development of our nation, the
economy of rural area has also increased significantly; in which livestock
activities have contributed major income for many farmers. However, the
negative side of this quick development is environmental pollution caused
by the waste of livestock activities. It is estimated that only 40-50% of total
livestock waste is properly treated before discharging to environment, the
rest is directly released into ponds, lakes and canals.
To solve the environmental problem, several technologies have been
proposed and conducted to treat livestock waste like physical methods
which separate solid and liquid waste, or biological methods based on
anaerobic or aerobic condition. Among biological methods, biogas
technique has been proved to be an appropriate method to treat livestock
waste, and it has been widely used nowadays. However, some limitations of
biogas technique such as high P and N in outlet water that does not meet the
permitted standards lead to the necessary to construct an extra-treatment
step before discharging into the environment.
The extra-treatment step aims to reduce the remained P, N and
organic matters in effluent to meet standards before discharging. One of the
potential methods that are suitable for such a goal is eco-technology that
uses aquatic plants as a factor to treat the pollutants. This method has been
reported to have several advantages compared to regular wastewater
treatment system. Eco-technology is environmentally friendly, low cost,
easy to operate, and has a high and stable treatment efficiency. Many
countries in the world have studied to apply this method.
Vietnam is a promising country for applying Eco-tech to use aquatic
plants in water pollution treatment. However, the research and application
of this technology in Vietnam remains limited and/or unsystematic, only in
small experimental scale and lack of practical research to put the technology
into practice. Therefore, we conduct the study entitled: "Research on the
application of aquatic plants in the treatment of pig waste water" aiming
to propose an effective technology for livestock waste treatment, suitable
for Vietnam technological conditions, contributing to minimize
environmental pollution in residential areas. This is a promising strategy to
develop sustainable livestock farming along with environmental protection
and life quality improvement.
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