João Paulo Francisco,Jonathas Batista Gonçalves Silva,Leonardo Duarte Batista da Silva,Ana Carolina Cruz de Azevedo,Rhegia Brandão da Silva, Universidade Federal Rural do Rio de Janeiro, Departamento de Engenharia, jonathasbsilva@gmail.com
ABSTRACT
Currently, the aluminum is the chemical coagulant most used in Brazil. Use of this coagulant may cause health problems caused by residual aluminum in treated water, also hindering the final disposition of sludge, because aluminum is an element harmful to plants and animals. The use of natural coagulants and inexpensively, can provide mitigation of the problems linked to consumption of unsafe drinking water and sewage wastewater, untreated, into receiving water bodies. The seeds of Moringa act as flocculators of suspended solids in the water, for presenting clotting properties attributed to cationic proteins that interact with organic material from water, destroying the colloidal stability and facilitating their removal by sedimentation. Therefore, this study aimed to evaluate the use of moringa seed crushed in the flocculation of suspended solids present in wastewater from dairy. We observed an average efficiency of removal of total solids equal to 67.32%. However, there was no difference between averages, according to the Tukey test at 5% probability.
KEYWORDS: sedimentation, naturals coagulants, seeds of Moringa