Majority of Wastewater treatment plants in Thailand faces the problem of over design, as this is
based on the Biochemical Oxygen Demand (BOD) content of the inputted wastewater having a
lower concentration than the efficiency of the design system. To meet the purpose of this study the
findings of the optimum recommended BOD concentration for the effectiveness of the treatment
and high operating costs. Water samples were collected from January 2009 to December 2017 (N
= 90). The results showed that the BOD concentration differ shows an inconsistence variation over
time as this is due to the wide range of wastewater sources from various activities. The results of
this paper showed that the recommended BOD concentration for the wastewater treatment plant
should be 80 mg/L in the vicinity of the city, while 60 mg/L is the recommended concentration
for wastewater that has been transited for over 5 hours into the treatment plant system away from
the city, as the transferring processes of the wastewater through the close pipeline resulted in an
anaerobic treatment which reduces the BOD concentration. Thus, the overall concepts suggested
that the BOD concentration entering the wastewater treatment plant of 80 and 60 mg/L respectively
falls under the 80% confident range.
Keywords
Domestic wastewater; BOD concentration; Wastewater treatment; Self-purification; Sewer system
ENIVRONMENT ASIA
Published by : Thai Society of Higher Education Institutes on Environment Contributions welcome at : http://www.tshe.org/en/
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