High Rate Algae Pond

Flow diagram of a two stage wastewater treatment process. In first stage, wastewater passes through the UASB reactor where organic waste is decomposed, mineralising nutrients whist producing bio-gas as a by-product. While in the second stage, wastewater is passed to algae raceway, where a paddle wheel circulates its flow. This stage removes remaining organic waste and other nutrients via algal and bacterial growth.