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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 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...

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 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 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...

Hi Folks, I am looking into cooling the discharge stream from a Bio-Reactor containg 30% lignin at 150 C and 5 bar a pressure. It is supposed to be cool-down to 70 C. Does any one have idea to cool it down? Lignin fration seems more problematic. Any standard practice? Thanks in advance for your...

Hi Folks, I have to design a flash tank for the discharge stream of a Reactor. The reactor is operating at 4. 78 bar a amd the flast tank is supposed to be operated at 0.8 bar a. My concerns are; -Do I need to create vaccum in the flast tank? Why and how? -Would it more logical to flast the...

Dear Folks, I have a general question on how steam demand should be specified. In some documents I read, the steam demand is mentioned in xxx kg/h. Should the pressure of the steam be mentioned as well? Is it a standard engineering practice? Is not it somehow mis-leading the reader? If yes, then...

Dear folks, I want to calculate sulphur contents in a Bio-mass product. From my process simulation, I can see how much sulfuric acid is going there. Can I calculate the sulphur contents from this or should I send the sample to a lab??? Thanks in advance for your advice on the subject.

Hi Folks. I am considering to use a multi effect evaporator for the watewater leaving from a biogas reator. Any one can give an idea, how much energy can be saved by adding one more effect?? I presume for single effect evaporator the energy demands would be 1 watt/kg of water evaporated (simple...

Dear Group members. I am looking into heat recovery by flashing the stream at high conditions to lower conditions. I want to recover the heat from the dischrge stream (65% liquids and 35% solids) of the reactor (leaving at 150 C and 10 bar g)by flashing it in flast tank (.8 bar g). Would it be...

Hi Guys, I am looking into the cooling water requirement for a bio-reactor where fermentation is taking place. Since the heat is generated in the fermentation reaction, I will have to keep the temperature to the desired value. Any suggestion/recomendations?Thanks in advance for your input on the...

Hi Guys,I am looking into the cooling water requirement for a bio-reactor where fermentation is taking place. Since the heat is generated in the fermentation reaction, I will have to keep the temperature to the desired value. Any suggestion/recomendations?Thanks in advance for your input on the...