Dear Miria, The process is ...

Dear Miria,

The process is the same for large scale or small scale, if you have small then power generation KW rather than MW.

Incineration technology is the controlled combustion of waste with the recovery of heat to produce steam that in turn produces power through steam turbines .Sewage sludge incineration – in some locations sewage sludge are incinerated separately from other wastes in dedicated installations, in others such waste is combined with other wastes (e.g. municipal wastes) for its incineration. Two suitable methods to directly convert sewage sludge into useful energy on-site at the waste water treatment plant. Both processes consist mainly of four devices: de watering and drying of the sewage sludge, gasification by means of fluidised bed technology (followed by a gas cleaning step) and production of useful energy via CHP units as the final step.

Energy output/Input ratio=

∑(HHV of the Product X(mass of the product)

                             Energy Input

The approximate energy efficiency of each process can be estimated by the equation above, while depending on different requirements and characteristics of each process, the energy input calculation may differ method to method and may be difficult to determine due to shortage of experimental data reported.

During the process of incineration, the waste material that is treated is converted in to gases, particles and heat. These products are later used for generation of electricity. The gases, flue gases are first treated for eradication of pollutants before going in to atmosphere. Waste-paper solid waste has to go somewhere and one of the easiest ways of dealing with the stuff is to incinerate it. But turning sludge to ash means adding an additional energy cost to the long chain of waste management needs.