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  1. B_DeW

    Mystery chemical (alkane?) in wastewater

    Thank you bimr and 1503-44 for the suggestions. I'll see if there are tests available in our lab to isolate/quantify alkanes and possibly identify them. I think jet fuel is unlikely as it's a mixture and more alkanes should show up. bimr: we've currently got a pilot plant up and running with...
  2. B_DeW

    Mystery chemical (alkane?) in wastewater

    We have an activated glass media and carbon filtration pretreatment to remove 50-70% of ammonia. Scaling isn't as much of a problem for us as we use forward osmosis at low pressure <5 bar. Thanks for the suggestions though, I'll make sure we look at the phosphorus as a possible problem. We...
  3. B_DeW

    Mystery chemical (alkane?) in wastewater

    Thanks bimr, It's treated residential wastewater from a medium sized city (800000 pop eq.) with some industrial wastewater (but not a lot) and including storm/rain water. Treatment consists of sedimentation, flocculation, and aeration. No chemical treatment. Sludge removal and sludge polymer...
  4. B_DeW

    Mystery chemical (alkane?) in wastewater

    Hi all, In a forward osmosis membrane process we recently found unexpected loss of performance due to damage or fouling (not sure yet). We use treated wastewater (final effluent) as our feedwater for the process. To find out what was causing the damage or fouling we sent a sample off for GC-MS...
  5. B_DeW

    Pure VOC recovery from solution in product water tank

    Thank you LittleInch, We do have a very low flow rate, approx 200L/minute of product with at most 5kg/hr inflow of the VOC (it's a relatively large tank). We did think about a tower-like structure but not a vacuum deaeration tower, will have a look if that suits our flow rate. Thank you! -b
  6. B_DeW

    Pure VOC recovery from solution in product water tank

    Thanks all for the tips! Andrew: We're removing it because of the cost and fire risk (we're bound to our industrial partner's ATEX zones and HSE management...). We'll look into warming or cooling the water, and test if any of those will make a significant difference. I'm afraid we don't have the...
  7. B_DeW

    Pure VOC recovery from solution in product water tank

    Dear all, My first post so please let me know if anything is wrong, and thank you in advance for your help! Without going into detail about the process our company designed (we're a scale-up), I'll try to give relevant details. We have designed a process that produces nearly pure water (think RO...

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