Methane is called a marsh gas because it is formed by methanogenic organisms that can be found is marshes (thus concentrations can be found in marches). read more
methane is called a mash gas because of where it is found. it is produced during the decomposition of plant matrials in the absence of air under the earth crust. read more
Bio gas is commonly called as marsh gas whose principal component is methane along with hydrogen sulfide and carbon dioxide. Henceforth methane is also sometimes called as marsh gas. Methane is the major component of marsh gas, other gases are found in very minute quantity. read more
The third stage is acetogenesis where the simple molecules from acidogenesis are further digested to produce carbon dioxide, hydrogen and mainly acetic acid, although higher-molecular-weight organic acids (e.g., propionic, butyric, valeric) are also produced. The fourth stage is methanogenesis where methane, carbon dioxide and water are produced. read more