A remote controlled raft for treatment of surface water using rotating bed reactor technology

Conditions: A pond containing tap water (2000 L), sodium hydroxide (150 mL, 1 M), and phenolphthalein (0.8 g) was neutralized within five minutes by two prototype rotating bed reactors, containing a total of 960 mL IRN99 H+ ion exchange resin, attached to a remote controlled floating prototype vehicle maneuvered across the water surface. The project was a cooperation between SpinChem, Umeå University and MTC centre for environmental technology.