Generation of electricity from mud is a highly green innovative technology which has now been implemented in Norway in a test phase to power street lamps and other utilities. It is based on an anaerobic microbial process, where the microorganisms in the mud mix with water causing a chemical reaction that gives out an electric ion and carbon dioxide as a by-product.
In order to extract this in from the mud, metals like copper and zinc are used that acts like electrodes to make it a circuit. These can be made into small batteries that are capable of giving out 1V of output. The only drawback in this technology is that the current tends to fluctuate. The advantage is as long as the mud is moist and has enough water to cause the chemical reaction, the batteries will continue to supply the 1V output.