PAD® Processes

The PAD® process (Pre-thickened Aerobic Digestion) is a controlled aerobic digestion system specifically designed to handle thickened sludge and to meet the Class B requirements for pathogens and vector attraction.

There are 3 different PAD approaches depending on the thickening technology being employed. The PAD®-K system provides integrated operation with a Kubota® fl at plate membrane thickener, the PAD®-M system provides integrated operation with a mechanical thickener such as a gravity belt or drum thickener, and the PAD®-G system provides integrated operation with a gravity thickener tank. In addition to thickening, all of the approaches use two or more aerobic digesters to optimize performance while keeping capital and operational costs to a minimum.

Key features & benefits

• Capable of Digesting up to 5% Total Solids
• Class B biosolids
• Lower Nitrogen levels in the treated biosolids
• Enhanced pH and temperature control
• Improved pathogen destruction
• Smaller sludge volumes for disposal

How we create value

• Our designs provide operational flexibility, process enhancement and reliability
• Our systems offer low maintenance and operational costs
• Our systems optimize aeration requirements leading to smaller carbon footprints