5.5. How to backwash ............................................................................................................. 20
5.5.1. Backwash velocity for pressure and RGF filters ......................................................... 20
5.5.2. Air scour ..................................................................................................................... 21
5.5.3. Bed Expansion ........................................................................................................... 22
5.6. Pressure filter System Schematics .................................................................................... 24
5.7. Differential pressure and injected mass ........................................................................... 25
5.8. Pressure Filter backwash procedure ................................................................................. 26
5.9. RGF Rapid Gravity Filter backwash procedure ................................................................. 26
6.
Storage ................................................................................................................................... 27
6.1. Precautions for safe handling ........................................................................................... 27
6.2. Conditions for safe storage .............................................................................................. 27
7.
Disposal of waste and spillage ............................................................................................... 28
Annex 1: Some Key Applications for AFM® ................................................................................ 29
Annex 2: UK Municipal wastewater treatment .............................................................................. 30
Annex 3: The removal of Arsenic, Ferric and Manganese ............................................................. 33
Annex 4: Removal of Phosphate from water ................................................................................. 36
Annex 5: Analysis of product water prior to connection of drinking water filtration system to a
network .......................................................................................................................................... 40
Dryden Aqua Ltd
Butlerfield-Bonnyrigg,
Edinburgh EH19 3JQ Scotland
Page 3 of 44
Annex 6: Water quality standards ................................................................................................ 42