3. Results and discussion
According to Table 1, when characteristics of
influent quality were compared to the central
wastewater treatment effluent standard and effluent
standard of Ministerial Decree No. 51 (B.E. 2541)
issued under the Building Control Act, B.E. 2522, they
exceeded both standards [6]. Whereas comparing to the
surface water quality standard, they showed that BOD
exceeded this standard. However, SS, surfactant, and
FOG values were not specified in the surface water
quality standard