<p><strong>Aim:</strong> The aim of this study is to determine the most effective type and concentration of coagulant to reduce TDS, TSS, BOD and COD Sumur Batu Fecal Treatment Plant or <em>Instalasi Pengolahan Lumpur Tinja</em> (IPLT) Sumur Batu. <strong>Methodology and Results</strong>: Using the jar test method at a laboratory scale, the types of coagulants of PAC, Alum and FeSO4 with varied concentration of 70 mg/L, 137.5 mg/L and 200 mg/L were used. Additionally, Polyacrylamide was also used in the study with concentration varied between 0.1 mg/L, 0.6 mg/L, and 1.1 mg/L adjusted to the concentration in the field. <strong>Conclusion, significance and impact study: </strong>Results showed that Alum with a concentration of 200 mg/L was the most effective coagulant, with removal efficiency for each parameter is as follows TDS = 82.17%, TSS = 67.69%, BOD = 60.16%, and COD = 59.76%.</p>
LABORATORY STUDY ON THE OPTIMIZATION OF IPLT SUMUR BATU DEWATERING UNIT USING DIFFERENT COAGULANTS