Effect of Precipitation Time of Moringa Seed Powder (Moringa Oleifera) and Tamarind Seed (Tamarindus Indica L) as Coagulant in Reducing Bod and TSS of Domestic Wastewater

Abstract

Wastewater treatment can be carried out through coagulation and flocculation processes by utilizing moringa seed powder and tamarind seeds as coagulants, which are proven to improve wastewater quality. This research aims to determine the effect of deposition time on the decrease in BOD and TSS. This type of research was a quasi-experimental with 3 replications at the time of deposition for 30 and 60 minutes of moringa seed powder and tamarind seed powder with a dose of 4.5 mg/l and the same stirring speed. The results showed that the percentage reduction in BOD for deposition time at 30 and 60 minutes of moringa seed powder was 65.54% and 72.57%, respectively. The decrease in TSS was 70.52% and 72.89. Deposition of 30 and 60 minutes of tamarind seed powder to decrease BOD was 62.34% and 64.58%, respectively. The decrease in TSS was 72.98% and 84.03%. The results of statistical tests for BOD significant value of 30 and 60 minutes of deposition of moringa seed powder are 0.008 and 0.007<0.05, for TSS that is 0.002 and 0.014<0.05. BOD significant value 30 and 60 minutes of deposition of tamarind seed powder was 0.019 and 0.018 <0.05, for TSS it is 0.006 and 0.004 <0.05. The conclusion of this research is that there is a significant effect of deposition time of moringa seed powder and tamarind seed on the reduction of BOD and TSS. The largest decrease in BOD was produced by moringa seed powder and the largest decrease in TSS was produced by tamarind seed powder. The next stage of processing should be carried out so that the levels of BOD and TSS after being processed using moringa seed powder and tamarind seed can meet the standard.