The Pontiac Clinton River Water Resource Recovery Facility recently completed the construction of a new Thermal Hydrolysis Pretreatment (THP) system, sludge dewatering system improvements, expansion and improvement of the existing dewatered biosolids storage facility, and construction of a new septage receiving facility. The THP system is a newer and innovative process that involves conditioning of the sludge under high heat prior to anaerobic digestion. This process results in a more easily digested sludge and a Class A Exceptional Biosolids.