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  1. Mattysdad

    individual wastewater treatment

    Consider a non-biological system - no drain field, mound, leachbed, etc. makes water as clean as rain and goes goes with rainwater - like to a footer drain. Power consumption is proportional to sewage flow. EPA says DESIGN FOR 100 GAL / PERSON / DAY AND THAT'S FINE BUT AVERAGE WATER...
  2. Mattysdad

    Acceptable headloss?

    head pressure @ static conditioon same regardless of size - it's measuring height of a colum of water. the cameron head loss would be the dynamic pressure - i.e. static head less friction loss in nozzle - make sure to account for additional friction loss if there is any associated length of pipe...
  3. Mattysdad

    Sanitary Drainage Fixture Count Preliminary Estimate

    look for "Ten states standards" via google Where are you located ? Many states have min. standards for dwellings based on home type - e.g. 100 gpd / person if you are going to sanitary sewers. If you are designing an onsite WWTP that may be a different story. 1 water saver toiler = 1 gallon...
  4. Mattysdad

    Grey Water

    One can get much greywater but there are only so many toilts to flush ....
  5. Mattysdad

    copper water services corroding

    If these are older homes with galvanized piping, and/or other metallic materials you may be seeing galvanic corrosion.
  6. Mattysdad

    Distance from inlet to suction -wet well

    Do not confuse air entrainment with cavitation - cavitation is hydraulic phenomenon - not related to air. Air entrainment is a function of several items - most important that suction meets minimum submergence in all conditions - usually worst case is maximum flow rate at pump off liquid level...
  7. Mattysdad

    Convert low temperature waste heat into power

    in what form is the heat - hot water, hot oil, hot air ?
  8. Mattysdad

    Biomass drying

    How dry do you want it ? What is the destination of dry bulk material. Thermcools' statement on rough approximation is correct - except I don't understand what He means by "heat absorbed by bulk biomass" and "loss to the ambient". While as a unit operation Themcool is correct on rough...
  9. Mattysdad

    Heat Transfer of open topped tanks

    What sort of a climate are you in ? Is this domestic sewage or industrial wastewater ? Are tanks concrete, steel, fiberglass ? Are tanks in ground or above grade ? What is typical sludge concentration ? If it were simply heat transfer through sidewalls and bottom of tank, how would you...
  10. Mattysdad

    type of cooler for a sludge?

    What is maximum solids size ?
  11. Mattysdad

    Supercritical Steam Tables

    Combustion enginnering publishes free handbook of steam tables & drawingsk. Have had and used mine for many years.
  12. Mattysdad

    Biomass drying

    describe what you are doing a bit... I have a lot of ideas !!!
  13. Mattysdad

    What is the best way to heat water fast?

    Insinkerator and hotshot make hot water dispensers for 180+°F...
  14. Mattysdad

    30% Propelyene Glycol/Water Mixture

    you can get from sizing software @ flatplate" www.flatplate.com/software.htm
  15. Mattysdad

    how many kcal needed to get 10000 kg sat. steam

    what do you need to do with the steam, there may be a better way ?
  16. Mattysdad

    Performance calculations of plate and fin heat exchanger

    www.flatplate.com/software.htm
  17. Mattysdad

    Designing a tubebundle for heating a tank, need help

    maybe you should loook aflatplates website. They have a java sizing tool that can be extremely helpful. This an a better way than shell & tube for any application. www.flatplate.com/ www.flatplate.com/software.htm
  18. Mattysdad

    Heat Transfer of open topped tanks

    Whoa a bit here ... Digestion is a biological process in which there are many and complex reactions are taking place. There are bacteria eating other bacteria and producing gases. There is digestion of primary sludge (primary digestor) which is essentially large organics, greases, oils...

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