Biosolids Handling and Septage Receiving Facility

Tooles-Allied was recently awarded this exciting new high profile project. The Pontiac WWTP Biosolids Handling and Septage Receiving Facility project includes 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 biosolids.

The Construction includes, but is not limited to the following:

• A new biosolids handling building, a new septage receiving building and septage receiving storage tank and new biosolids cake storage pad with cover.
• Installation of the following: New belt conveyors and walkway from the biosolids handling building to the sludge storage pad, new process water system including both high pressure process water system and a low pressure process water system, new primary (raw) solids pumping system and new secondary digester cover, new primary and secondary digester mixing systems and new digester gas piping and conveyance, new digester solids recirculation system,  new septage receiving equipment, new solids screening and blending systems and new pre-dewatering system and cake hopper, new post-dewatering system and solids conveyors, new dewatering polymer systems and new steam boiler system.
• Reconstruction of the waste gas burner.
• Installation of the Thermal Hydrolysis Pretreatment (THP) system.