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  1. birkATO

    Liquid Ring Vacuum Pump - will it remove ethanol vapor

    Thank you all for the responses. I need to digest this and decide what I need to do. I am an air quality engineer and I am trying to identify a justifiable means of estimating emissions of EtOH from this process. I believe there will be very little entrained, non-condensible gasses in the...
  2. birkATO

    Liquid Ring Vacuum Pump - will it remove ethanol vapor

    Hello. I do have a ChemE background but it has been 20+ years since I have been exposed to process engineering. I have a question. If we have a tank of ethanol (approximately 70F indoors) and we pull vacuum on it using a liquid ring pump (water as the liquid), would any significant amount of...
  3. birkATO

    vapor pressure of PEG 400

    Hi, I am trying to find out if there is such a thing as a published vapor pressure for polyethylene glycol 400 at a elevated temperature. SDS's I have found show the vapor pressure is < 0.01 mm Hg psi at 20C. My application is using PEG400 at about 300 F. The problem is that a state regulator...
  4. birkATO

    Convert scfd to lb/d

    This is probably way too late of a response, but to convert SCFD to lb/day, you would use the Ideal Gas Law. First we would need to know what the "standard" temperature and pressure are. Probably either 0, 20, or 25 Celsius and 1 atmosphere. Then plug values into ideal gas law (P*V=n*R*T) to...
  5. birkATO

    how much methanol in air at a given temperature

    Ah yes, partial pressures coming back to me now. Thanks for the step in the right direction. This should get me in the right ballpark as all I need is a best guess. I will calculate total moles of gas at condensing temp and 1 atm, then use the ratio of methanol vapor pressure/1 atm to...
  6. birkATO

    how much methanol in air at a given temperature

    Well, I may have a ChemE degree, but I can't for the life of me remember most of the gas phase equillibrium details that I probably once was tested on. I am working with a process that will consist essentially of a stream of air saturated with methanol and water vapor that will be routed to a...
  7. birkATO

    NESHAP ZZZZ Engine Rules at an Airport

    Most airports are required by the FAA to have emergency generators operating during periods of low visibility in the event that utility power would be lost so that runway lighting will not go down. The new engine rules (NESHAP ZZZZ) specify that "emergency" generators can comply with the rules...
  8. birkATO

    Learning AERSCREEN/AERMOD

    Hi Peter: There are probably several online and in-person training sessions available for AERSCREEN. I searched the internet for "AERSCREEN training" and there are several available although I can't personally reccomend any of them because I have not taken them. An introductory course on the...
  9. birkATO

    Welcome

    Hi Anouri. I work with permitting landfill gas (LFG) to energy facilities frequently. I know exactly what your concern is. There are several methods of removing H2S and siloxanes from landfill gas. The method chosen usually depends on how bad the gas is and how far down you need to go...
  10. birkATO

    Welcome

    I find that there are a lot of "environmental" forums on the internet, but they mostly relate to Civil topics and not enough towards Air Pollution/Control/Air Permitting. Air Permitting is a difficult topic to keep on top of with the speed with which US EPA changes rules. I hope that this...
  11. birkATO

    Thickness of rust on steel

    Hi: I know I probably will not provide enough informaiton to get what I need, but here goes...I need to estimate how much rust is sandblasted off of a large piece of steel which I beleive to be some type of mild carbon steel with a coating of surface rust. Are there any methods out there on...
  12. birkATO

    EPCRA reporting

    I am working with some EPCRA reporting and have some questions. For one, if a powerplant uses coal as fuel (and stores more than 10,000# onsite) is that reportable under EPCRA (sec 311)? I found an MSDS that states it is not hazardous for EPCRA, but other sources I run across say it is...
  13. birkATO

    Type of flowmeter for large water pipe

    Would anyone have a recomendation for the type or perhaps even a brand of flowmeter to install in a particular applicaiton? The pipe is 20" and 30" steel pipe pumping water at a rate of 2000-5000 GPM. The site happens to be fairly remote. Power is available, but no buildings. I am a little...
  14. birkATO

    PM Emission Factors for Wood Piles

    I am writing a permit for a company and they have wood chip storage piles sitting outside. The wood is fairly wet, 40% moisture or so. Does anyone know of a good source of information to determine the fugitive particulate emissions from wind erosion acting on the piles? The only part of AP-42...
  15. birkATO

    pump discharges at various elevations

    What happens to the head that a pump experiences when there are two or more outlets at different elevations? My situation is this...I have several high volume pumps (Pumps A) pumping water through steel pipe (20" and 30"). I know all the lengths of pipe and even some rough estimates of...
  16. birkATO

    Multiple pumps in a system, trying to determine individual flows

    I have an interesting problem here: I am working dewatering pumps. There are three 9 stage pumps pumping water into a 30" pipe. This 30" pipe goes about 6000 ft, then has a 12" line tapped into it, which splits again into a 5" and 1.5" pipe. The remainder of this water continues up the 30"...
  17. birkATO

    Centr. Pump Flow from kW readings

    I have a bunch of kW data (hour by hour)used by some pumps that are used for pumping water from one area to another. They are rather high volume pumps...around 3000 gpm each. What I want to do is take all the kW data and use that to estimate a flow rate for each pump during each hour to get a...
  18. birkATO

    Pump flow from kW?

    I do know the total head, but I don't know the efficiency.
  19. birkATO

    Pump flow from kW?

    I have a bunch of kW data (hour by hour)used by some pumps that are used for pumping water from one area to another. They are rather high volume pumps...around 3000 gpm each. What I want to do is take all the kW data and use that to estimate a flow rate for each pump during each hour to get a...
  20. birkATO

    Acetic acid +NaOH = Methane?

    I am a consultant. One of our clients has access to acetic acid as a waste stream and wanted to know if that reaction would be possible. The only way I know to make methane out of Acetic acid is using microbes. I just though I would run in through here to see if anyone has ever heard of a...

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