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Thanks for your reply Stone Cold. The CAPEX and OPEX are not justifed against the amount of ethanol recovered for atmospheric distillation. Vaccum distillation or flashing under vaccum might be a better solution. Though I have a feeling with vaccum distillation the CAPEX would be higher due to...

Hi folks, I have a Ethanol-Water solution containing 3 vol% of Ethanol. I am looking into the possibilities to do the vaccum distillation in order to concentrate it to 90 vol% Ethanol. Can someone suggest how to see the effect of vaccum on the boiling point of the solution? and how the...

Hi Drexl, Thanks for your reply. How much is this few percent of Boiler capacity? 3-5%??

Hi folks, I am investigating steam losses in a process plant.Generally most of the steam is recycled as condensate to the boiler but still there are some losses and need some make-up water for boiler. Is there any rule of thumb for these steam losses.?? Thanks in advance for your help on the...

The stream is ethanol water solution with ethanol conc. between 2-3% and 0.13% solids. The idea is to recover the ethanol and further purify this with pressure swing adsorption to the fuel grade ethanol. I hope it calrify the issue.

Hi folks, I am doing a sensitivity analysis for ethanol recovery by distillation unit (coupled with dehydration unit) from a ethanol water mixture at various ethanol concentrations. By changing the conc. of ethanol in the feed the height of distillation unit will be change. and also the price...

Hi folks, I am looking in to the possibility of recovering 1,3 PDO in a liquid liquid extraction unit using Butanone as solvent. How it can be calculate the solvent flowrate and % recovery and etc. Does anyone of you have experience withiin this area. Thanks in advance for your input on the...

Dear all, I am looking in to a feasibility if it is possible to recover Bio-ethanol from liquid stream by Reverse Osmosis (or pressure swing adsorption). The stream has very little soilds as the solid fration of the biomass is removed in earlier stage. Any references or recomendation?? Thanks in...

Hi folks, I was looking for the composition of Biomass (wheat straw or some other one). They mentions the amount of cellulose, hemi cellulose and lignin but nothing about the rest of the components(oragnic or inorganic compounds)present in it. Ash composition is also available where all these...

Hi folks, I need to calculate the chemical oxygen demand for a waste stream leaving from biogas reactor. One way to to send the sample to lab or calculate it. does someone have some input on how to calculate COD for waste water stream?? Thanks in advance for helping me out. /Z

Hi ione, My appologies, I did extracted table 5 rule of tumb for my calculation from the document you sent. I should read the whole paper. Thanks a lot. Its really a good document.

Thanks for your reply siretb, What does Np and N stands for?

Hi folks, I need know the power demand for agitater to be installed a fermentation tank. Is they some online programme which can do the job. Thanks in advance for your input on the issue. Best Regards Zahid Mushtaq

Hi Folks, I am trying to calculate the electrical power demand for a process plant. Where pumps and agitator motors are main consumers for the electricity. Is there some rule of thumb to calculate the electricity demand for the pumps (based on flowrate) and motors. Thanks in davnce for your...

Hi process folks, Is they any data base of fermentation tank supplier?? Where size can be seen as function of price? Thanks for your input on the issue.

Hi all, I am looking for ISO numbering system for engineering documents. Can someone have any idea from where I can get that. Does it applies to bio-industry as well or some other standard??? Thanks in advance for your help.

Hi Mbeychok, Thank you very much for your reply. I can see its was a bit hard to follow what I asked. Lets me explain. We are in R&D phase for Bio-ethanol production from biomass (C5 mainly liquid and C6 solid phase) and sulfuric acid acid in these stream comes from the pre-treatment step and...

Hi folks, I am adjusting the pH of liquid solution (containng C5 liquid) by adding NaOH. Sodium sulphate will formed. Can I assume the reaction to be 100% complete at 70 C? Is Sodium sulphate soluble in liquid fration? This stream is then mixed with C6 (solid fraction)before distillation and...

Thanks for your reply StoneCold. The amount of water is too high and require too much heat to evaporate this water in the final processes!!!

Hi Whammett, Thank you very much for your reply. The flash stream is low pressure steam and I wanna use it for some other consumers. Not really interested in condensing it. What's about a steam ejector? thanks in advance for your reply..