BIOGAS

HIS GRACE ACADEMY

PRESENTS

SEMINAR ON

BIOGAS TECHNOLOGY AND ORGANIC FERTILIZER PRODUCTION

WHAT IS BIOGAS?

Biogas is a naturally occurring mixture of 60-80% methane, 20-40% carbon (IV) oxide (CO₂), less than 1% of hydrogen sulfide (H₂S) and traces of water vapor which burns similar to so called natural gas from fossil fuel. Only methane is the combustible gas found in the mixture of gases that make up the biogas.

HOW IS BIOGAS FORMED?

Organic waste materials can be converted into gas or biogas which is composed of different gasses by microorganisms under anaerobic condition. The organic waste contains complex organic compounds such as cellulose, protein, starch, tannins, etc. The complex compounds are first broken down into simpler water soluble substances such as glucose, fructose, fatty acids and amino acids which are easily acted upon by some of the methanogens in the digester to release the biogas.

WHAT IS A DIGESTER?

The digestion process or methanisation is performed in a physical structure called digester or bio-digester. The main purpose of the digester is to provide the anaerobic condition required for the digestion of organic materials by methanogens. The methanogenic bacteria required to perform the anaerobic digestion are generally present in the organic materials are that feed into the bio-digester.

WASTES THAT CAN GENERATE “BIOGAS”

v Cattle dung

v Pig dung

v Cattle and pig dung from a floating removal system

v Poultry dropping

v Kitchen waste

v Saw-dust

v Rice and maize straw

v Grasses

 In general, all organic wastes that can decompose fast

What are the benefits of biogas ?

Benefits of biogas to the society

v Renewable energy source

v Reduced greenhouse gas emissions and mitigation of global warming

v Reduced dependency on imported fossil fuels

v Contribution to EU energy and environmental targets

v Waste reduction

v Job creation

v Flexible and efficient end use of biogas

Benefits of biogas to the farmers

v Additional income for the farmers

v Digestate is an excellent fertiliser

v Reduced odours and flies

v Veterinary safety

What is Organic fertilizer?

          The slurry which comes out or collected from the biogas plant or digester is directly or after drying used as organic fertilizer for improving soil-fertility and reducing use of chemical fertilizers.

The bio-slurry is rich in main nutrients such as Nitrogen, Potassium and Sodium (NPK) along with micronutrients - Iron & Zinc etc. Due to the anaerobic digestion of organic matter, these nutrients concentrations were easily taken up by plants.

Digestate has a high commercial value when exported. The dried effluent could also be used as an adsorbent to remove lead from industrial wastewater.

Benefits of Organic Fertilizer

(Bio-slurry)

Scientifically and practically proven by farmers that bio-slurry contains more nutrients than inorganic fertilizer and manure. Also, there is an increment in the yield of agricultural produce when bio-slurry is used compared to others.

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