ABSTRACT Defective products are products that have the form of a finished product, but in a condition that is not in accordance with the standards set by the company. Products that experience defects affect the amount of production and production time if the product must be remade. The purpose of the analysis is to find the number of defects, the grade of paper that has defects, the effect of …
The Finishing Department is the final stage of the paperboard product production process, in this area there will be a process of grouping and packaging products based on customer requests. The packaging process has a main machine, namely a pallet packing machine which functions to package products using shrink film plastic material. The packaging process using these tools and materials has…
ABSTRACT The use of steam time and temperature during the preheating and prehydrolysis stages, as well as heating in the cooking process, has a significant impact on the final quality of dissolving pulp (AE). These two parameters result in P-Factors and H-Factors, which are important indicators in determining the quality of dissolving pulp (AE). Understanding the effect of P-Factor and H-F…
ABSTRACT The sedimentation rate in a slurry is the speed at which solid particles settle out of the liquid due to the force of gravity. A dispersant is a dispersing agent used to ensure that the particles in the GCC slurry remain stable, do not clump together, and do not settle. This study aims to determine the effect of dispersant dosage on the sedimentation rate, viscosity, and solid con…
ABSTRACT The manufacturing process of Ground Calcium Carbonate (GCC) involves wet grinding which requires a certain energy known as Specific Grinding Energy (SGE). This energy is critical in achieving the desired particle size and has a direct impact on the quality of the final product as well as the efficiency of the energy used in the process. This study aims to analyze the effect of pow…
ABSTRACT The DA stage is an important stage in the process of increasing brightness because the DA stage is a delignification stage to damage and separate the remaining lignin structure in the pulp. This study aims to determine the effect of temperature and time on brightness, fiber morphology and tensile strength. In this study, the DA bleaching process was carried out using chlorine dioxide …
ABSTRACT Recausticizing is a process of chemical recovery plant that is tasked with converting green liquor into white liquor as the main product and lime mud as a by-product. Lime mud is one of the by-products of recycling in the pulp industry process produced from the recausticizing process which has a high CaCO3 content so that it can be used as the main material for the calcination process…
ABSTRACT The rotogravure printing technique is a direct printing technique. Printing techniques in deep printing or rotogravure include direct printing techniques, namely printing raw materials directly in contact with the gravure cylinder as an image carrier. During the production process, there are often production defects such as printing defects. The existence of printing defects in wrappi…
ABSTRACT Wastewater treatment is an important part in supporting the sustainability of pulp and paper industry operations. One of the stages used to improve wastewater quality is the coagulation-flocculation process in tertiary treatment. This study aims to evaluate and compare the performance of two types of coagulants, namely aluminum sulfate (alum) and polyaluminium chloride (PAC), which ar…