The factory has already built a wastewater treatment facility to treat their wastewater with
the capacity of 160 cubic meters per day. While in operation the neighbors often
complain to the factory about bad smell and bad water quality discharged from the
factory. The Department of Environmental Affairs has also issued warnings from time to
time.
Alan, owner of the factory, wants to solve this problem and has contacted Dr. Kong from
Singapore to design a new wastewater treatment plant so that the factory will be able to
treat their waste according to the government standard.