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To check the pH level and C/N ratio to Sewage treatment plant waste. pH should be 6.5 to 7.5 and CN ratio will be16 to 25 for better biogas Production. Mainatain the temperature in the anaerobic digester (A.D) 30 to 40 avg. 

Domestic plant Installation will be done in 1 day and for commercial plant it will take upto 6 weeks.  

Biogas is commonly made from animal slurry, sludge settled from wastewater and at
landfills containing organic wastes. However, biogas can also be made from almost
any organic waste has the ability to produce biogas: human excreta, slurry, animal
slurry, fruit and vegetable waste, slaughterhouse waste, meat packing waste, dairy
factory waste, brewery and distillery waste, etc. Fiber rich wastes like wood, leaves,
etc. make poor feed stocks for digesters as they are difficult to digest. Many
wastewaters contain organic compounds that may be converted to biogas including
municipal wastewater, food processing wastewater and many industrial
wastewaters. Solid and semi-solid materials that include plant or animal matter can
be converted to biogas.

Biogas plant produces biogas and bio manure. Biogas can be used for thermal
application like cooking, lighting and power generation through diesel/petrol
gensets. Bio manure can be used as fertilizer in agriculture. Bio manure increases
annual grain yield.

Under the family size biogas plant 1, 2, 3, 4, and 6 CUM plants are considered as
standard design.

A biogas plant consist of the following parts-
a. Mixing tank and inlet
b. Digester
c. Gas holder or gas storage dome
d. Outlet and compost pit
e. Gas main outlet valve, pipeline, gas stove  

It depends on the size of the biogas plant. Generally 2
cum biogas plant requires 15 feet × 15 feet plane
surface. The site must be open to receive sun
radiation for most part of the day that keep the plant
warm.

Biogas digestibles receive organic matter, which decomposes in the digestive tract. The digestive chamber is completely immersed in water, creating an anaerobic (oxygen-free) environment. The anaerobic environment allows microorganisms to break down organic matter and convert it into biogas.