Pengendalian Kualitas Limbah Cair dengan Metoda Peta Control di Pt. Perkebunan Nusantara Ii, Pks Pagar Merbau

Abstract

PKS Pagar Merbau is a company engaged in the palm oil processing that producing Crude Palm Oil (CPO) and Palm Kernel. The aim of the study is to control the quality of liquid waste generated from the production process by using Statistical Quality Control method. The result shows that COD parameter with UCL as much as 255.89 mg/l, CL is 222.65 mg/l and LCL is 189.41 mg/l. Then, pH Parameter have the value of UCL is 7.65, CL is 7.21 and LCL is 6.77. Then again, TSS Parameter contain the value of UCL is 181.71 mg/l, CL is 154.94 mg/l, and LCL is 128.17 mg/l. Moreover, BOD parameter have the UCL value as much as 100.91 mg/l, CL is 80.50 mg/l, and LCL is 60.09 mg/l. Next for the oils and fats parameter, the UCL value is 17.99 mg/l, CL is 14.96 mg/l and LCL is 11.92 mg/l. Lastly Total Nitrogen Parameters is 19.02 mg/l, CL is 15.74 mg/l, and LCL is 12.46 mg/l. The whole liquid waste processes at PT. Perkebunan Nusantara II - PKS Pagar Merbau was fully control wheter there are data which is outside the control limits but still within the quality standards PERMENLH Number5, 2014, in Appendage III. After revising the data beyond the control limits (COD, pH, and TSS parameters), thus the revision control limits are obtained as follows: COD parameter which the value of UCL is 256.20 mg/l, CL is 222.50 mg/l and LCL is 188.79 mg/l. pH Parameter which the value of UCL is 7.65 , CL is 7.19 and LCL is 6.74. TSS Parameter which the value of LCLis 195.89 mg/l, CL is 165.62 mg/l and LCL is 135.35 mg/l.