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Both terms are used. MLVSS is more representative and is now preferred, but MLSS is easier to determine in the lab and has been in use for a long time.

That didn't come out right at all! I meant to say that, in my experience, most wastewater treatment plants lack equalization basins and when they do have them, they are usually downstream of the plant's headworks, to remove the grit and screenings from the influent to the equalization basin...

Au contraire, my friend. Headworks processes, such as grit chambers and screens, should be sized to handle peak flows that can get to the plant. This is standard practice. Not many plants have flow equalization facilities either, as that is not the typical case at all. In those cases where...

This is a very simple problem. If you are stumbling, I suggest you brush up in basic water/wastewater concepts. Vol = Qpeak * t = 8,300 ft^3

Re: Metcalf & Eddy. The international editions are less expensive and the content matches the US editions page by page. The paper they are printed on is a lot thinner and the photographs don't look as nice, though. For example: Metcalf & Eddy

Well, here's where we disagree. I have seen F/M expressed with dimension 1/T in more than one occasion. I do believe that many years ago it was always expressed as mass BOD5/lb mass of MLSS, but I've also seen it expressed with different units, as I explained in my other message. I don't see why...

Yep, a quick Google search yields several: F/M = 1,669 lbs/day / 3,552 lbs = 0.47 day-1 CE 356: Fundamental (sic) of Environmental Engineering For conventional aeration tanks the F/M ratio is 0.2-0.5 lb BOD5/day/lb MLSS... Environmental microbiology By Raina M. Maier, Ian L. Pepper...

#2 is similar to #1. It's all in the units. Usually people get confused when converting between lbm/gal and mg/L. By the way, you may find F/M expressed in different ways, sometimes dimensionless, sometimes with dimension of 1/time. #3. The 85% removal efficiency would apply to the whole...

I also passed on my first attempt last April. I second the recommendations for the books by Kuo, LaGrega and Salvato (although I would try to find the 5th ed. of the latter). I also took with me the Metcalf & Eddy tome but I can't remember if I used it. Regardless, I think good references on...

I do believe the instructions called for a certified professional translator, which is what I used; he stamped each sheet and provided contact information. However, I'm pretty sure that NCEES would accept your translated documents if they came from the school directly, with official stamps or...

Whether your degree is from Germany, China or Pluto is immaterial. There are good and not-so-good schools everywhere, the US included. The fact is that if the degree is from a non-ABET school, the State Board wants the transcripts, syllabus, etc., evaluated. I requested two official copies of...

Last night I received an e-mail from the board congratulating me for having passed the PE exam.

Did you check your Junk Mail, redsouther? In my case the message from the Board was flagged as junk even though I had previously added their e-mail address to the legitimate list. Gotta thank Outlook for that one...

Another way to check: the link you received in an e-mail from the GA Board when they received your application becomes inactive once you've passed. If you click on it you will get a web page directing you to verify your license. At least that's what happened to me when passing the FE and PE...

For those who didn't pass. I'd recommend taking a sample exam, and based on the results decide whether a review course would help or not. I couldn't find a local review course and I don't do that well with online material, but by taking a sample test I was able to determine where I should...

I passed! First time taking the PE Exam, 26 years after obtaining my ChemEng degree. Congratulations to everyone else who passed...

I get a properly formatted page, but without results.

I also have M&E's international edition, and when I compared it to the US edition I found them to be the same, except for the paper stock used.

Never mind, I think the one I mentioned is volume 2, and the other two volumes are ISBNs 0470083034 and 0470083050.

Is this this one you recommended? Environmental Engineering: Prevention and Response to Water-, Food-, Soil-, and Air-borne Disease and Illness It's also a 6th edition, and it may be one of the three volumes. But if so, which are the other two?