The Use Of The Aloe Vera Gel In Improve The Water Quality Of The Wood Waste By The Coagulation-Floculation Method

Abstract

The plywood industry that uses resin and formaldehyde will produce wastewater that can cause environmental pollution impacts if discharged directly into the waters, so it needs to be treated. This treatment uses the coagulation-flocculation method with aloe vera gel as a natural coagulant to know the effect of the optimum dose variation on wastewater treatment from the PT X plywood industry. The wastewater treatment method in this study uses aloe vera gel coagulant at pH 7 and an optimum dose of 60 g in 250 mL of wastewater. The parameters in this study were Chemical Oxygen Demand (COD), Total Suspensed Solid (TSS), pH, phenol and total ammonia. The results showed a decrease in COD levels from 189 mg/L to 97 mg/L; TSS from 565 mg/L to 47 mg/L; pH from 7.78 to 7.01; total ammonia from 20 mg/L to 9 mg/L, and phenol from 11 mg/L to 0.005mg/L. The percent reduction in COD, TSS, pH, total ammonia and phenol values obtained were 48.67%; 91.68%; 9.65%; 55% and 99.95%, respectively. This shows that aloe vera gel coagulant is able to improve the quality of plywood wastewater in accordance with the quality standard parameters of plywood wastewater according to Permen LHK RI No. 5 of 2014.