Well briefly explained sludge is created by every Waste Water Treatment Plant in the process of disposing the broken down and cleaned waste water produced by every house hold that is sent to the treatment plants through sewerage pipes.
Disposing of Sludge just in one City (Like the one I live in)
roughly requires at least 2 to three treatment plants and thousands of miles of underground pipes. Then a place to put it in land fill sites. This is a big operation hundreds of employees, people equipment, millions of dollars just in ONE city.
If "Sludge-Away" works like it saids it does, by reducing sludge by 80% and in a way that you can actually use the 20% for fuel.
Your talking millions of dollars saving for each local utility companies waste water systems. **** THATS JUST ONE CITY ***