PEMANFAATAN SERBUK BIJI ASAM JAWA SEBAGAI BIOKOAGULAN UNTUK MENURUNKAN KONSENTRASI TSS, TURBIDITY, BOD DAN COD DALAM PENGOLAHAN LIMBAH CAIR INDISUTRI TAHU

Abstract

ABSTRACK Indonesia have many plant that some of them can use as biocoagulant. One of them is tamarind plants which it’s seed have potention as biocoagulant. Because of that, Tamarind Seed useless need to developed continously for the other treatment, example for waste water treatment. Study on the effect of tamarind as a coagulant and tamarind particle size of the percentage reduction of turbidity, TSS and COD from tofu wastewater using coagulation flocculation process were experimented. The operation variables were the coagulant dosages (1gr, 2gr, 3gr, 4gr, 5gr /100 ml aquadest), tofu wastewater pH (6,5) and tamarind particle sizes (powder screening, 100 mesh, 170 mesh and 250 mesh). Data were analysed graphically. The results showed that the optimum dosage of tamarind seeds as coagulant was 1 gr/100 ml aquadest tofu wastewater at pH 6,5 using 100 mesh particle size which could removed 88,53% of turbidity, 91,50% of TSS, 64,57% of COD and 80,54 0f BOD. Based on the result, tamarind seeds are effective used as coaguland for tofu wastewater treatment. Keywords : Tamarind Seeds, Tofu Wastewater, Coagulation, Flocculation, Dosage and Tamarind Partikel Size