The focus of this paper is to study the asynchronous generator (generator of squirrel-cage induction), as an alternative distributed generation technology, in particular the driving of machines using methane gas from pig farms as their fuel. Pig farming has grown dramatically over recent years. This agroindustrial activity produces huge quantities of methane gas which is released into the atmosphere depleting the ozone layer, in addition to contributing to the greenhouse effect. When the subject is environmental concerns, methane is known to be many times more aggressive than carbon. Since the production of this gas is inherent to the pig farming industry, its effects can be mitigated by using it as fuel in an engine to drive an electricity generator, while adding value to the production chain.