Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. FiltrationEngineer

    waste water treatment/components recovery

    You could recover the water and concentrate the waste stream if you wanted.
  2. FiltrationEngineer

    Primary treatment component arrangement

    From what I've heard (and I'm not an expert), you want the grit chamber before the fine screen to minimize the wear on the mechanical apparatus of the fine screen. This appears to be in general agreement with the post above. Pumping is site specific. You need to select pumps capable of...
  3. FiltrationEngineer

    Problem with excel hyperlink inside excel

    I'm using Excel 2007. It is so weird. The formula doesn't act the same, depending on the mood of microsoft. Sometimes it jumps me to the wrong cell, sometimes it tells me it can't open the file. I inserted the hyperlinks manually. In the end it took less time than hunting for a solution online.
  4. FiltrationEngineer

    Problem with excel hyperlink inside excel

    When I use the formula: =HYPERLINK('SheetName!A8,"?") The hyperlink works. When I copy the formula to other cells, like this: =HYPERLINK('SheetName!A200,"?") and follow the hyperlink, it puts me back into cell A8, not cell A200. Any ideas why?
  5. FiltrationEngineer

    Reverse Osmosis

    I'm guessing you wouldn't use RO for that. I'd start with looking at the size of the colloidal partical you want to remove and then select a membrane. Possibly UF followed by RO?
  6. FiltrationEngineer

    Replacement Aeration System Design

    Metcalf and Eddy method in the textbook is different than the method used by fine bubble diffuser manufacturers, which is the EPA method. In any case, you need the following information: -Basin dimensions -AOR (oxygen demand) in this case you have what is called a step aeration process I think...
  7. FiltrationEngineer

    Control of Feed & Bleed Membrane System for Product Concentration

    Can you use an equalization tank to take out the variable inlet flows and then run the system at a constant feed and bleed flow rate? The control strategy woud include a constant feed flow and constant permeate rate, controlled with a control valve on the permeate and a vfd or control valve for...
  8. FiltrationEngineer

    Dairy Process Wastewater Treatment, Odor Control

    For odor control, I think you have a couple options: 1. Aerate the EQ. There are lots of products out there for this, and if you're interested I can send you several different contacts. 2. Cover the EQ, and treat the offgas with an odor scrubber. If the influent is pretty stinky, you won't...
  9. FiltrationEngineer

    UV Dose for Wastewater Disinfection

    NWRI guidelines required 80 mj/cm2 at 65% UVT for an application I worked with. I'm pretty sure that NWRI sets different requirements depending on if the wastewater is being used for re-use.
  10. FiltrationEngineer

    UF and NF operating logical

    Just think about Net flow vs. gross instantaneous flow. The UF system should provide an average (net) flow, so as long as your transfer tank is large enough to handle the rise in level during filtration period and fall in level during backwash, you should be fine.
  11. FiltrationEngineer

    RV waste disposal into septic tank

    I recently worked on a pilot study testing an activated sludge system on RV waste - primarily because the existing septic system for the RV waste are failing. We were able to achieve good treatment with activated sludge. Toxicity levels in RV waste weren't high enough to prevent biological...
  12. FiltrationEngineer

    SS304 with bleach?

    Thanks guys... I guess what I'm looking for is literature in regards to limits for chloride solution concentration for austenitic stainless steel. Something about the authority of print will work better for me than gr2vessels said so. Its interesting how much time I spend documenting things...
  13. FiltrationEngineer

    SS304 with bleach?

    I'm interested in how I would prove that putting a .5 to 1% solution of sodium hypochlorite on 304 stainless steel for about 2-3 hours per month (CIP process) is not going to significantly affect the material. I can look up chemical compatability charts, but I would like to know how this...
  14. FiltrationEngineer

    Zinc Levels higher than permited

    I know of an industrial pretreatment plant that had a similar problem. They searched for a source of zinc in the chemicals they used and couldn't find one. On a whim, the plant manager sent some tap water out for zinc testing and it came back out of limits. The city was using some kind of...
  15. FiltrationEngineer

    Big interview, need big help

    I'd talk about your career goals and why you want to work in the defense sector. I would leave out the part about why you want to work for them. Also, I think its very important to interview the company as much as they interview you. Research them and ask them hard questions like, "where do...
  16. FiltrationEngineer

    Which offer to accept?

    I'd take the ABB job. I believe there is no substitute for field work for a new engineer and your learning is greatly accelerated in the field. I would also plan on leaving that job in 1-2 years and follow a design engineering path. Tell Allen Bradley that you want to get field experience...
  17. FiltrationEngineer

    First Time Review, Ask For Raise

    I would clearly define your accomplishments and reasons for goals not being met. This is an opportunity to document to the managment the shortcomings that are out of your control. I would also offer solutions if possible. Also, research what a design engineer in your industry makes. If this...
  18. FiltrationEngineer

    Material of construction in coastal environment

    I'm designing some equipment to go in a coastal environment. Specifically, a simple equipment skid that supports pumps and blowers, etc. The skid is placed outdoors and is not subjected to chemicals, etc. I'm trying to decide between SS316 and galvanized, or painted galvanized, etc. Your...
  19. FiltrationEngineer

    Peristaltic Hose Pumps in Waste Water Treatment?

    I've used one in a pilot. I think it had about a 1.25" hose on it. I used it for wasting sludge from a bioreactor that had about 1% sludge. It worked ok. Because I was using it intermittently and it had sludge sitting in it the inlet hose before the pump rotating thing would have to be...
  20. FiltrationEngineer

    Keeping the ice chest cold

    Here's my take: You use ice to take advantage of the latent heat of melting. The temperature in the inside of the cooler should be zero C until all ice has melted. Assumption: the R value of the insulation is >>> than the difference in convective heat transfer between the inside wall of the...

Part and Inventory Search

Back
Top