Abstract
Enormous waste treatment facilities, construction costs associated with annual maintenance costs will grow gradually to is known as the decrepit facility maintenance costs also.
However, numerical evidence not about the renewal of the facilities so far have been determined as customary. We intended to build the current best time to update facilities by analyzing them to take advantage of accounting date of the municipality in this paper model. Also went to derive methods in the future our model 1 case verification to generalize and find out optimal renewal time of the facility easily and intended to.