http://www.makebiofuel.co.uk/bioethanol-production

The first step involves the pretreatment of lignocellulosic biomass (if it is expected to start from the latter). It consists of physical-chemical, chemical, mechanical, biological processes, etc. They are provided because they allow to make biomass more easily attacked by enzymes that are used in the subsequent hydrolysis step.

This is followed by the alcoholic fermentation with the use of bacteria or yeasts that have the function of converting the fermentable sugars obtained after the hydrolysis process in ethanol. Finally there is provided a distillation to recover ethanol from the fermentation products.

If you want you can read also others papers written by  Prof. Mohammad Taherzadeh or Prof. Parameswaran Binod.

Regards,

gaetano

The bioethanol production procedure depends on the nature of the raw material used.

The ethanol production from sugars includes mainly steps such as fermentation and purification. The production from lignocellulosic materials includes in addition the degradation od such materials in fermentable sugars.

See also:

https://www.researchgate.net/publication/228365492_Biofuels_a_survey_on_pros_and_cons

and 

https://www.researchgate.net/publication/263542808_Bioethanol_Production_from_Cotton_Stalks_or_Corn_Stover_A_Comparative_Study_of_Their_Sustainability_Performance

Best regards

Article Biofuels: A Survey on Pros and Cons

Article Bioethanol Production from Cotton Stalks or Corn Stover? A C...

Four main Step are

1.  Biomass pretreatment

2. Enzymatic hydrolysis of pretreated biomass using commercial or in-house fungal produced cellulase

3. Ethanol fermentation of the sugars obtained after hydrolysis (either using simultaneous asaccharification and fermentation or separate hydrolysis and fermentation)

4. Distillation/ethanol recovery

You may follow our paper our paper, where you will find all the procedure and calculations in an easy to understand language

https://www.researchgate.net/publication/264430537_Bioethanol_production_from_wheat_straw_via_enzymatic_route_employing_Penicillium_janthinellum_cellulases

Article Bioethanol production from wheat straw via enzymatic route e...

you can see the simple steps of biofuel production from sorghum biomass from attached paper. regards

SS RAO

Dear Amr,

In addition to my colleagues, I suggest to take a look in the reference below, available for download in ResearchGate, where this subject is presented in the Chapter 3, 4 and 5, considering conventional and in bench technologies. 

regards, Horta

https://www.researchgate.net/publication/269038981_Sugarcane_based_bioethanol_energy_for_sustainable_development?ev=prf_pub 

Book Sugarcane based bioethanol: energy for sustainable development

From sugar cane, sugar cane milling, fermentation of sugary liquid using sacharomynces and distillation. From corn, treatment with amylase, and subsequent fermentation of the product.

Tap palm wine from oil palm. Distill the liquor to obtain ethanol.

From sugarcane: subject to size reduction; add brewers' yeast; ferment the broth; distill the fermented liquor to get the ethanol

Thanks for all

Steps for Bioethanol production

.Pretreatment

.Hydrolysis

.Fermentation

.Distillation

.qualitative test for ethanol

-harvest sugarcane

-milling

-addition yeasts

-distillation

http://www.cropenergies.com/Pdf/en/Bioethanol/Produktionsverfahren.pdf