@article{camargo_ratusznei_rodrigues_zaiat_borzani_2002,  title={Treatment of low-strength wastewater using immobilized biomass in a sequencing batch external loop reactor: influence of the medium superficial velocity on the stability and performance},  volume={19},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322002000300001},  DOI={10.1590/S0104-66322002000300001},  number={3},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Camargo, E.F.M. and Ratusznei, S.M. and Rodrigues, J.A.D. and Zaiat, M. and Borzani, W.},  year={2002},  month={Jul},  pages={267–275} }