18.104.22.168.2 Greywater challenge water: Systems treating laundry source water
Prepare the challenge water according to the following formula:
|Wastewater components1||Amount/100 L|
|liquid laundry detergent (2X)||40 mL|
|test dust2||10 g|
|secondary effluent||2 L|
|raw influent screened to ≤ 1mm||1 L|
|liquid laundry fabric softener||21 mL|
|urea||As needed to bring influent TKN within the specified range|
|NaOH||As needed to adjust pH|
|HCl||As needed to adjust pH||1 See Annex C for example products.
2 See ISO 12103-1, Road Vehicles – Test Dust for Filter Evaluation. The test dust shall meet the specification of ISO 12103-1, A2 – Fine test dust. A test dust that meets these specifications is available from Powder Technology, Inc. Inc., PO Box 1464, Burnsville, MN 55337. Source.