[2] Solid-state anaerobic digestion, which contains six genera of methanogens including Methanobacteria, can ferment rice straw and then produce methane.

Since conventional treatment is burning rice straw in field, applying Methanobacteria to waste disposal process can reduce the air pollution caused by straw burning and also alleviate energy shortage problem, especially in rural areas.

Methane in breath is produced by anaerobic methanobacteria in human colon as a metabolic end product.

[5] The status of Methanobacteria product detected in breath tests can be used to evaluate patients' particular gastrointestinal disorders.

It is shown that the proportion of breath methane excreters among patients with colorectal cancer is much higher than that of normal people.