Penentuan Brightness Pulp pada D0 Eop D1 dan D2 Stage di Unit Bleaching pada Pembuatan Pulp PT.Toba Pulp Lestari, Tbk – Porsea

Abstract

Bleaching process in PT. Toba Pulp Lestari, Tbk using the main chemicals that Cl2 and ClO2, as well as using NaOH at the extraction stage which can produce good pulp and meet the standard of ISO (International Standart Operational). Therefore, PT. Toba Pulp Lestari, Tbk to test the brightness of the pulp. To obtain a pulp that meet the standard then any additional chemicals that are conducted at each stage that is D0 EoP D1 and D2 must be balanced or stable. One of the tools used in the PT. Toba Pulp Lestari, Tbk to test the brightness of the pulp is to use tools Electronic Refrakto Photometer (ELREPHO). Based on the results of data analysis can be undertaken in the know that the brightness of the pulp has met the ISO standard that is in use by PT. Toba Pulp Lestari, Tbk is D0 = 55-60%, EOP = 65-75%, D1 = 85-88% and D2 = 89- 91%.