Robuta

https://periodicos.ufpb.br/index.php/juee/article/view/42885?articlesBySimilarityPage=8 EFFECT OF RECYCLE RATIO AND HYDRAULIC RETENTION TIME ON DENITRIFICATION-NITRIFICATION PROCESS |... hydraulic retention time effect recycle ratio denitrification https://www.tj-es.com/ojs/index.php/tjes/article/view/390 Effect of Recycle Ratio and Hydraulic Retention Time on the Performance of Extended Aeration... hydraulic retention time the performance extended aeration effect recycle