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Project:Carotenoids from spent coffee grounds
Description:Production of carotenoids from the hydrolysis and fermentation of spent coffee grounds from the HoReCa sector

Selected functional unit
QuantityUnitFunctional unit description
1gProduction of 1 gram of carotenoids from spent coffee grounds.

Input materials
QuantityUnitDescription
1250gSpent coffee grounds sourced from the HoReCa sector
12.5kgProcess water for hydrolysis and fermentation stages
125gSulfuric acid used for the acid hydrolysis process
90gSodium hydroxide used for pH neutralization of hydrolysate
20gNutrient supplements including yeast extract and mineral salts
Output materials
QuantityUnitDescription
1249gSolid coffee ground residue remaining after hydrolysis and fermentation stages.
12.735kgLiquid wastewater containing neutralized salts and dissolved organic nutrients.
Energy inputs
QuantityUnitDescription
1.15kWhPre-treatment including drying and milling of spent coffee grounds
1.85kWhThermal energy for heating and agitation during acid hydrolysis
3.2kWhEnergy for sterilization and bioreactor operation during fermentation
0.95kWhDownstream processing including centrifugation and carotenoid extraction
Energy outputs
QuantityUnitDescription
0kWhNo energy produced
CO2eq emitted
QuantityUnitDescription
0.46Kg CO2eqPre-treatment including drying and milling of spent coffee grounds
0.74Kg CO2eqThermal energy for heating and agitation during acid hydrolysis
1.28Kg CO2eqEnergy for sterilization and bioreactor operation during fermentation
0.38Kg CO2eqDownstream processing including centrifugation and carotenoid extraction
0Kg CO2eqNo CO2eq emitted directly
Captured CO2eq
QuantityUnitDescription
0Kg CO2eqNo energy produced
0Kg CO2eqNo CO2eq absorbed

Production of 1 gram of carotenoids from spent coffee grounds.