it shows that the amount of sludge generated from flotation was 0.27–0.45%of the daily
discharge flow of this restaurant and its mean value was 0.34% . It implied that the amount of sludge
generated was about 1.36 m3 per day for a restaurant with a daily discharge flow of 400 m3. In other words ,
the higher is the flow , the more will be the sludge generation . However,it is commonly recognized that the
dirtier theeffluent is,the more chemicals that will be used for treatment, which means more money will
be spent.