Microbes in the Production of Biogas
Some bacteria that produce methane are called methanogens eg. Methanobacterium which grows anaerobically (in the absence of air) on cellulosic material and produces a large amount of methane along with CO2 and H2
Location of Methanogens
They are found in the anaerobic sludge (sewage treatment). They are also present in the rumen, a part of the stomach of cattle eg. cows, and buffalo. They break down cellulose and play an important role in the nutrition of cattle. Along with these, methanogens are also present in marshy areas.
Biogas Plant
It consists of a concrete tank in which bio-wastes are put and slurry is made. It has an outlet, which is connected to a pipe to supply biogas to nearby stations/houses for cooking and lighting. The spent slurry is removed through the second outlet and used as fertiliser. The technology of biogas production was developed by the efforts of the Indian Agricultural Research Institute (IARI) and the Khadi and Village Industries Commission (KVIC)
Microbes in Human Welfare Notes
CBSE Class 12 Chapter 8 Microbes in Huaman Welfare: Microbes are the smallest living organisms that can only be seen under the microscope. Microbes are found everywhere. Examples- are air, water, soil, inside and outside the bodies of plants and animals, thermal vents (1000 degree Celsius), under the layers of snow, and in acidic environments. All microbes are not harmful, some are very useful. Microbes are pathogenic in nature but some microbes are beneficial for humans.