Comparing to the central wastewater effluent
standard, the effluent did not meet the requirement.
The effluents from both grease traps were still
exceeded the central wastewater treatment effluent
standards. However, when comparing to the standard
from the Ministerial Decree No. 51 (B.E. 2541) issued
under the Building Control Act, B.E. 2522, it was
found that effluent from the modified grease trap had
the SS value complied with the effluent standard of the
class C buildings and had BOD value complied with
the effluent standard of the class E buildings. For the
effluent from the simple grease trap, it was found that
the BOD value complied with the effluent standard of
the class E buildings whereas the SS value exceeded