<b>Biological systems combined for the treatment of coffee processing wastewater: II - Removal of nutrients and phenolic compounds</b> - doi: 10.4025/actascitechnol.v35i3.13628

• Main Authors: Ronaldo Fia, Antonio Teixeira de Matos, Fátima Resende Luiz Fia
• Format: Article
• Language: English
• Published: Universidade Estadual de Maringá 2013-06-01
• Series: Acta Scientiarum: Technology
• Subjects: anaerobic reactor; constructed wetland systems; phenols; nitrogen; phosphorus; coffee
• Online Access: http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/13628

<p class="aresumo">Three treatment systems consisting of anaerobic filters with upward flow followed by constructed wetland systems (CW) were evaluated for the removal of nutrients and phenolic compounds, in the treatment of coffee processing wastewater (WCP) in Viçosa, Minas Gerais State. Filters were made of PVC (1.5 m high and 0.35 m diameter) filled with gravel # 2 and CW were made of wooden boxes (1.5 m long, 0.4 m high and 0.5 m wide) sealed by HDPE geomembrane and filled with gravel ‘zero’. The WCP had the pH adjusted with lime to values close to 7.0 and the nutrient concentration changed to obtain a BOD/N/P ratio of 100/5/1. As a result, hydraulic retention times longer than 160 h in all treatment systems during phase III had not promoted greater efficiencies for removal compared with the phase I, because the recovery time of the systems was inadequate. The F₁+CW₁ system that received the lowest organic load, showed a satisfactory performance with regard to the removal of nutrients (above 50%).</p> <p class="apalavrachave"> </p>