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Recent content by nbuc7

  1. nbuc7

    Seals for aluminum dome covered tanks

    Hi everyone - I have large (90 ft. dia.) concrete sludge storage tanks covered by aluminum domes. I am designing an odor control retrofit for the tanks and need to seal the gap (approximately 1-2" but it varies) between the top of the concrete walls and the aluminum domes. The walls are 2 ft...
  2. nbuc7

    Bar Screen in Sewer Manhole

    How are they planning on cleaning screens installed in a manhole??? Under extreme events when high peak flows are experienced, blinding of screens in the collection system sounds like a recipe for trouble.
  3. nbuc7

    Chlorine Contact Tanks

    What are you planning on using for dechlorination? Remember that the contact time required for dechlorination is much less than that needed for chlorine contact (1-5 minutes at the most). So if you follow RWF7437's calc steps with your actual depth, you can see how much tankage you still have...
  4. nbuc7

    Fabricated Inflatable Dams

    We started to take a look at using alternate technologies (bending weirs, etc.) however this is being done as part of a total system improvement, and the client has invested money in rehabilitating the controls and automation for the blowers already. Basically - they want dams, so dams are what...
  5. nbuc7

    Fabricated Inflatable Dams

    A client of ours has fabricated inflatable dams installed within the sewer system to regulate flows. We're looking at replacing some of these dams, however I'm having a tough time finding anyone that still makes these for such applications. Bridgestone used to make them, but they're getting...
  6. nbuc7

    Low concentration mercury removal from scrubber water

    Thanks for the tip Muggle - I'll be in contact with you shortly.
  7. nbuc7

    Low concentration mercury removal from scrubber water

    Thanks for the tip and update monaco8774, I appreciate it.
  8. nbuc7

    Low concentration mercury removal in liquid stream

    Mercury has been an on-going issue with a client of ours at a large wastewater treatment plant (120 MGD average). Multiple hearth incinerators are currently in place, with scrubber water being sent to lagoons for decanting. The decant and overflow is sent back up to the headworks of the plant...
  9. nbuc7

    Low concentration mercury removal from scrubber water

    Mercury has been an on-going issue with a client of ours at a large wastewater treatment plant (120 MGD average). Multiple hearth incinerators are currently in place, with scrubber water being sent to lagoons for decanting. The decant and overflow is sent back up to the headworks of the plant...
  10. nbuc7

    Low concentration mercury removal from scrubber water

    Mercury has been an on-going issue with a client of ours at a large wastewater treatment plant (120 MGD average). Multiple hearth incinerators are currently in place, with scrubber water being sent to lagoons for decanting. The decant and overflow is sent back up to the headworks of the plant...
  11. nbuc7

    Reference Material

    mbeychok - We have chemical and process engineers at our firm that are doing the actual design of the process, etc. However, the project as a whole falls under the guise of a civil/environmental project at our firm. Trust me - no one is relying on me to design this stuff! But being part of...
  12. nbuc7

    Reference Material

    I'm currently working on a project that has me getting my hands dirty with a little more process stuff than I've had experience (or eduacation) in. We're using many different types of separation processes to remove unstable contaminants from ground water (liquid-liquid extraction, absorption...
  13. nbuc7

    Residential Homes - Structural Evaluation

    Thanks for all the help everyone, I appreciate it. I'm just going out now to start looking to narrow things down. Once we think we might have a winner, I'll definitely fork out the cash for a home inspector. Until then, all of these are great tips for the initial review. Thanks again!
  14. nbuc7

    Residential Homes - Structural Evaluation

    This is a personal use post, so if you don't feel the need to reply, then that is quite ok. Being a Biological Engineer, I never had any formal structural training. My wife and I are in the process of buying a home, and I was hoping some of you structural folks may be able to point me in the...
  15. nbuc7

    Sludge Collectors - Technology Comparison

    I'm trying to find any publications or info comparing (pros and cons) of sludge collectors in primary and final settling tanks - specifically traveling bridges and longitudinal chain and flight collectors. I've been looking through various texts ("Wastewater Engineering Treatment and Reuse"...
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