INTRODUCTION
Virtually all of the aqueous wastes
produced by humans are returned to the
environment with the result that water
supplies may be polluted, eutrophication
may occur, and aquatic forms of life may
suffer. In primitive ages, the self-purification
capacity of nature was much greater than the
rate of water pollution caused by human
activity. However, as time passed with the
increasing density of population, the rate
of environmental pollution has exceeded
the rate of natural purification. The
Bangkok Metropolitan Administration
(BMA) already has central sewage
treatment plants in practice. They rely on
biological oxidation. Most modern
biological processes are capable of
removing organic pollutants efficiently,
but it is difficult to remove nitrogen and
phosphorus compounds efficiently, causing
eutrophication in the receiving body of
water. Additionally, the central treatment
plant concept cannot be serve the whole
country.
INTRODUCTION
Virtually all of the aqueous wastes
produced by humans are returned to the
environment with the result that water
supplies may be polluted, eutrophication
may occur, and aquatic forms of life may
suffer. In primitive ages, the self-purification
capacity of nature was much greater than the
rate of water pollution caused by human
activity. However, as time passed with the
increasing density of population, the rate
of environmental pollution has exceeded
the rate of natural purification. The
Bangkok Metropolitan Administration
(BMA) already has central sewage
treatment plants in practice. They rely on
biological oxidation. Most modern
biological processes are capable of
removing organic pollutants efficiently,
but it is difficult to remove nitrogen and
phosphorus compounds efficiently, causing
eutrophication in the receiving body of
water. Additionally, the central treatment
plant concept cannot be serve the whole
country.
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