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Usually, the design of sanitary technologies is thought for the removal of nutrients. In order to promote nutrients recycling, new project design thinking has to be incorporated. This work starts with a reflection in order to dialogue with the community-scientific in this field. In addition, a technology based on these principles is presented. Its is capable of promoting the recycling of the phosphorus present in the sewage. The technology is composed of 4 reactors: digester pit, decanter, vertical constructed wetland and constructed wetland partially filled with ferric sludge. The system presented removal efficiency of 94.4% ± 3.2% for COD and 91.2% ± 7.8% for suspended solids. The efficiency of removal of the soluble reactive phosphorus (Psoluble) was of 95% and decreased until reaching the saturation of the adsorbent. The authors conclude that the application of ferric sludge is interesting to promote a technology of low cost and low operational demand for recovery of phosphorus. The lifetime of the adsorbent was estimated between 1.6 and 9.7 years.

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Uma tecnologia de saneamento ecológico para a recuperação de fósforo e reflexões sobre a prática de design tecnológico: incorporando valores socioambientais