The diagram below shows a possible future means of home energy production. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram in figure illustrates the steps of a process that is designed to autonomously produce energy at home without relying on external suppliers. The first step implies the need for organic material, or compost that is mixed with water in a relatively large tank. Fermentation will generate methane gas which is intubated into a wide storage and then a compressor. Such device will increase overall exiting preassure of methane while the gas is directed towards a combustion engine. Here, the pressurized gas is ignited and the deriving chemical energy will move specific devices which convert chemical energy into mechanical energy. The resulting energy is fundamental for the last phases of the process. In fact, mechanical energy will be used in a generator to produce electrical energy. Finally, electrical energy, the wanted byproduct of the entire process, is stored in a battery before being used for domestic reasons.