Abstract:
The invention provides an apparatus that comprises at least a first channel providing a first liquid flow path for a liquid to be treated and a second channel arranged adjacent the first channel providing a second liquid flow path downstream the first flow path for the liquid to be treated, wherein the first and second channels each comprise a light receiving surface provided with respective first and second photocatalysts arranged for initiating a photoreaction inside the respective channel to produce a photoreaction product, wherein downstream the first and second channels, first and second separators, respectively, are arranged for removing the photoreaction product from the liquid passing said respective separator, wherein the first and second channels are conductively interconnected such that the liquid passing along the first liquid flow path is in electrical contact with the liquid passing along the second flow path.