1. Amity Institute of Organic Agriculture
Group presentation
(AGRI 411)Manure , fertilizer and agrochemicals
Topic-Biogas, slurry and sewage their uses and importance
Group member – Damini panigrahi
. Mahima dogra
Anupam anand
Kishan kumar
Rajat Srivastava
. Yash Chaudhary
2. Amity Institute of Organic Agriculture
Bio-gas Plants
• A biogas plant is the name often given to an anaerobic digester that
treats farm wastes or energy crops. It can be produced using anaerobic
digesters.
• These plants can be fed with energy crops such as
maize silage or biodegradable wastes including sewage sludge and
food waste.
• During the process, the micro-organisms transform biomass waste into
biogas (mainly methane and carbon dioxide) .
4. Amity Institute of Organic Agriculture
Biogas
• Biogas is a mixture of gases, primarily consisting of methane, carbon
dioxide and hydrogen sulphide, produced from raw materials such
as agricultural waste, manure, municipal waste, plant
material, sewage, green waste, wastewater, and food waste. It is
a renewable energy source.
• Biogas is primarily methane (CH4) and carbon dioxide (CO2) and may
have small amounts of hydrogen sulfide (H2S), moisture
and siloxanes.
5. Amity Institute of Organic Agriculture
Uses of Biogas
• Biogas is environment friendly and has various applications in cooking,
drying, cooling, heating, etc. It is used in the production of electricity,
methanol, and steam.
1. Applications of Biogas in Homes:
• Biogas can be transferred to the kitchen with the help of a digester through
a tube. Biogas, when compared to other fuels, produces less pollution while
cooking (with an exception of electric current). Furthermore, the byproducts
of biogas can be used as fertilizer. Biogas also helps in producing indoor
light.
6. Amity Institute of Organic Agriculture
.
2. Biogas for Electricity:
• External combustion engine – When biogas is combusted externally,
Stirling motors can be heated with the help of heat exchanger. On the
expansion of the gas in the Stirling motor, electricity is generated.
Since its efficiency is low and it is relatively expensive, the use of
biogas for this purpose is limited.
8. Amity Institute of Organic Agriculture
Slurry
• Biogas slurry is a secondary product produced by anaerobic
fermentation of bio-materials.
• Biogas slurry is not only an environmentally friendly organic fertilizer,
but also an efficiently utilized waste material.
• The main product of anaerobic fermentation is biogas, which is an
important and clean energy. The by-product, biogas slurry can be
used in agricultural and forestry production. Currently, the use of
biogas slurry as a fertilizer has drastically increased in China and many
other Asian countries.
9. Amity Institute of Organic Agriculture
Two types of bio-slurry can be used as fertilizer:
• 1. Solid or dry bio-slurry:
This solid bio-slurry will come out of the outletto the slurry pit or
slurry shelter. Solid bio-slurry can be applied as afertilizer or
mixed intothe soil when processing it for the first time.
• 2. Liquid or wet bio-slurry:
Besides being used as fertilizer, wet bio-slurry can also be used
for pesticides. You can pour it on the part of the land that is
planted regularly. To get liquid bio-slurry, you need to mix it
with water. The mixing ratio can be 1: 1 or 1: 2.
