The Brazilian Association of Parboiled Rice Factories (ABIAP) has strict rules with reference to best manufacturing practices in terms of environmental legislation, which are entirely followed by Nelson Wendt Alimentos. In addition, it requires approval in inspections carried out by competent agencies, in this case, the Federal University of Pelotas. Nelson Wendt is proud of surpassing these demands, as our care with nature is one the greatest features of our industrial process. In conjunction with this university, we have developed the UASB reactor for parboiled rice factories, a process considered highly successful in the treatment of liquid waste.