waste utilization in sugarmills
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Transcript of waste utilization in sugarmills
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WELCOME
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WASTE MANAGEMENT IN
SUGAR MILLBY
GEETHU S2011-06-007
Kelappaji college of agricultural engineering and technology,tavanur,malappuram
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INTRODUCTION
Sugar mills produces range of by-products during the process of sugar extraction
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
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Fig: layout of sugar mill
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SUGAR FROM SUGARCANEHARVESTING
CRUSHING
JUICE FILTRATION
BOILING OF JUICE
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Cont…..SYRUP TREATMENT
CRYSTALLIZATION
CENTRIFUGATION
STORAGE
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Fig: sugar cane crushing operation
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WASTES FROM SUGAR INDUSRY ARE….
Sugarcane topsBagasseMolassesPress mudWaste water
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SUGARCANE TOPS
It is mainly used for fuel production and animal feed. It contain 85% dry matter, 5.5% crude protein. Energy value – 7 MJ/Kg.
PROCESS
Sugarcane tops drying pelletizing animal feed
steam production
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BAGGASE
Fibrous residue left after crushing and extraction of the juice It contains fibre water and small quantity of soluble solids It contain cellulose - 45-55% hemicellulose - 20-25% lignin - 18-24% ash - 1-4% wax - <1% USES Lignin from bagasse is used in fibre industry Cellulose used as a material for manufacturing of pulp and paper Fuel for electricity production Charcoal producton
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Mainly used for
Paper production Ethanol production Electricity/cogeneration
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12Paper production from bagasse
Bagasse
Dewatering pulp thickening
Cooking bleaching
Pulp washing paper
Pulp screening
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13Ethanol production from bagasse Bagasse
Pre-treatment by acid/steam
hydrolysis
fermentation(30⁰C for 36-48 hr)
distillation
ethanol
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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
fuel.
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MOLASES
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 USES Production of bio ethanol Principle ingredient in distillation of rum As additives in livestock feed Source for yeast production
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BIO ETHANOL FROM MOLASSES
Molasses
Distillation Gelatinization
Refining hydrolysis
bio ethanolFermentation(at 30⁰C for 36-40 hr)
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PRESSMUD
It is the precipitated impurities obtained after the filtration of cane juice
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
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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 water.
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THANK YOU