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  • Users: nbuc7
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  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

    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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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"...
  9. nbuc7

    Stage Exceedance Forecasts

    I'm looking to get a one year stage exceedance forecast for a specific river gauge in the USGS network. I was looking at NOAA and they have quarterly forecasts, but I was wondering if anyone has found or have any links to a full year forecast. Thanks!
  10. nbuc7

    Mean Frequency Distributions beyond 100 yr. Recurrence

    Does anyone know of any utilities to determine events beyond the 100 year reccurence? Some heavy flooding hit NE Ohio, and I was trying to categorize the event. I was using the Rainfall Frequency Atlas of the Midwest, but this event was way off the charts (9.7" in 16 hours). Any help would be...

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