Kelappaji college of agricultural engineering and
Sugar mills produces range of by-products during the process of
Each tone of raw sugar produce seven tonnes of waste product.
By-products include wastewater, molasses, bagasse, press mud
These wastes are mainly used, to producing fuel, to generate
electricity, used as nutrients for plant
WASTES FROM SUGAR INDUSRY
It is mainly used for fuel production and animal feed.
It contain 85% dry matter, 5.5% crude protein.
Energy value – 7 MJ/Kg.
Sugarcane tops drying pelletizing animal feed
Fibrous residue left after crushing and extraction of the juice
It contains fibre water and small quantity of soluble solids
cellulose - 45-55%
hemicellulose - 20-25%
lignin - 18-24%
ash - 1-4%
wax - <1%
Lignin from bagasse is used in fibre industry
Cellulose used as a material for manufacturing of pulp and paper
Fuel for electricity production
Mainly used for
Paper production from bagasse
Dewatering pulp thickening
Pulp washing paper
Ethanol production from bagasse
Pre-treatment by acid/steam
fermentation(30⁰C for 36-48 hr)
POWER GENERATION FROM BAGASSE
Sugar mills have been able to produce power in season as well as
off season by using bagasse.
3500 MV bagasse based cogeneration potential in our country.
It reduce the green house effect in terms of usage of biomass as
It is syrup left after the final stage of sugar extraction
Obtained as the result of boiling of sugar cane juice
Two type molasses – cane molasses and sugar beet molasses
Production of bio ethanol
Principle ingredient in distillation of rum
As additives in livestock feed
Source for yeast production
BIO ETHANOL FROM MOLASSES
Fermentation(at 30⁰C for 36-40 hr)
It is the precipitated impurities obtained after the filtration of cane
It is mainly used as a fertilizer
It contain 7% nitrogen and 1% phosphate
In combination with molasses and fish meal in the proportion of
50:35:15 used as feed for cow
WASTE WATER FROM SUGAR INDUSTRY
Anaerobic digestion, activated sludge treatment and trickling
filtration methods are used for waste water treatment.
In anaerobic digestion the dissolved organic solids are transferred
into methane , carbon dioxide, small amounts of other gasses
In trickling filtration and in activated sludge treatment the
microbial population utilises oxygen dissolved in the wastewater
to oxidise the dissolved organic matter to carbon di oxide and