Moringa Seeds (Moringa olifiera L.) Application as Natural Coagulant in Coffee Wastewater Treatment

Abstract

The coffee processing will produce a wastewater with a low pH. It is corrosive and dangerous for the environment. One of the alternative solution to solve this problem is by applying the coagulation- flocculation treatment. The natural coagulant that can be applied is the moringa seeds powder. The aim of this research is to optimize the coagulation – flocculation treatment by using mesh variation moringa seed powder in coffee wastewater pollution decreasing. Experimental design used a completely randomized design (CRD) to dosage the optimization based on mesh size variation in moringa seed powder with rind and rindless toward coffee wastewater pollution decreasing. Duncan assay showed that with α ≤ 0.05, mesh size variation in moringa seed powder with rind and rindless was significantly different. The best treatment in coagulation – flocculation using moringa seed as nature coagulant was rindless moringa seed powder. The optimal particle size was 60 mesh due for having a little efficiency level with 70 mesh and 80 mesh and it is easier than the manual one. It has the efficiency level decreasing in TSS, turbidity and COD of 60 mesh was 69.44 ± 1%; 88.15 ± 0.5 % and 41.80 ± 0.5 %.