The Energy Equation

Ifthe resident energy in sewage sludge is as high as coal, why not use that energy as a renewable fuel?

That seems a logical question, and yet more money and time is spent by community leaders and wastewater management in finding someone else’s back yard to dump it in, than there is in finding effective ways of using it for all its worth.

The most modern trend is to capture less than 50% of the available energy in the form of methane gas and burn it in gas-fired turbines. Unfortunately, that practice does not get rid of the toxic solids that must still be dumped somewhere, and conversion losses result in only 15% -20% of the total energy being recovered.

In the case of the DIBS process, it has been proven that 95% of the energy resident in sludge can be recovered when it is in a dry fuel form and in a state suitable for fluid firing.

Many cultures worldwide have at some time in their history burnt dry animal dung on cooking and heating fires, proof that animal waste burns and therefore has measurable energy content.

Sewage sludge emanating from treatment plants is in some cases incinerated. In recent years it has been dried to pellet form and used as a supplemental fuel, primarily as a convenient method of disposal, but not without dispersing toxins into the atmosphere. As a result, many communities have now banned the practice of incineration.

“we use the energy in sewage sludge, to convert sewage sludge to a clean high energy renewable fuel”