Phosphorus is a vital component for agriculture. Phosphorus current sources are limited and will be exhausted in a few dozen years. Thus, phosphorus recycling for agricultural use is therefore imperative. On the other hand, the presence of phosphorus in wastewater is an environmental problem of increasing dimensions, mainly due to the eutrophication of water bodies. The aim of this project is to simultaneously solve two environmental problems: 1) phosphate extraction from wastewater thus preventing eutrophication of effluents; and 2) to provide a renewable source of phosphorus that could be used as an agricultural fertilizer. To achieve this aim we will construct a genetically modified bacteria able to take up large amounts of phosphate and accumulate it in the form of polyphosphate.