... Comparative performance of an UASB and a biofilm reactor with Opuntia imbricata as a support in the treatment of textile industry wastewater . ... Department of Biotechnology of Autonomous University of Coahuila, Saltillo has been working with Opuntia imbricata as a natural support for t-he development of aerobic and anaerobic biofilm reactors to be used in the treatment of various kinds of wastewater for the last four years. ... Moscow University Chemistry Bulletin . 2006, Vol. ...