Anaerobic digestion (AD) is a series of natural biological processes whereby organic waste material is broken down by micro-organisms and converted into energy, known as biogas.A typical anaerobic digester is a sealed vessel, or series of vessels, in which bacteria act without oxygen. The organic material contents need to be fully mixed and warmed, usually to blood temperature.
Biogas is the name given to the mixture of gases formed during the anaerobic digestion of organic wastes.
Biogas consists of methane (c70%) and carbon dioxide (c30%).It can be used in stationary engines to generate electricity, but it is not suitable as a vehicle fuel.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers.
Last date updated on June, 2014