Prarancangan Pabrik Tepung Glukomanan dari Tepung Porang dengan Kapasitas 3.000 Ton/Tahun
Marcelino Severin, Sang Kompiang Wirawan, S.T., M.T., Ph.D.2023 | Skripsi | TEKNIK KIMIA
Glucomannan flour is a type of flour derived from the advanced processing of existing konjac flour. Currently, there are no industrial-scale glucomannan flour factories in Indonesia. Therefore, the construction of a glucomannan flour factory presents a profitable opportunity. The factory is planned to be built in the Nganjuk Regency, East Java, with a capacity of 3000 tons per year. This region is part of the konjac cultivation roadmap in East Java, making it easier to procure raw materials.
The production process of glucomannan flour is divided into two stages: the dry process, which eliminates impurities in the konjac flour, and the wet process, which involves extraction methods to purify and reduce the moisture content in glucomannan flour. The dry process begins with the separation of calcium oxalate compounds using a cyclone separator, followed by the reduction of starch content in konjac flour using a screen to separate the starch from the flour. The process then moves to the wet stage, where konjac flour is mixed with water to separate glucomannan compounds, which have a binding property with the water in porang flour. After mixing with water, glucomannan in the konjac flour is extracted using ethanol. The glucomannan flour and other compounds are then separated using the centrifuge filtration method. The glucomannan flour is further processed into small particles using a ball mill and dried using a fluidized bed dryer to obtain the final product for sale.
Based on the planned factory process and capacity, the required raw materials include 6,619.26 tons per year of konjac flour, 377,671.63 tons per year of water, and 16,368.26 tons per year of ethanol. The factory is supported by 188 employees who work in shifts. The overall water requirement for the factory is 83,737.79 kg/hour. The total electricity requirement for the factory is 9,467,093.70 kWh per year, and it is equipped with a diesel emergency generator for emergency situations.
The glucomannan flour factory is considered low-risk as it already exists in several countries such as China, the US, and Japan. The factory has a fixed capital value of 40,720,900.47 USD or 610,813,506,991 IDR, a working capital of 20,352,081.59 USD or 305,281,223,912.83 IDR, and a total production cost of 86,353,832.29 USD per year. The profit obtained by the factory is 8,721,817.60 USD before tax and 6,541,363.20 USD after tax. Based on the economic evaluation conducted to assess the feasibility of constructing the factory, the return on investment (ROI) after tax is 16.06%, the payback period (POT) after tax is 3.84 years, the break-even point (BEP) is 56.25%, the shutdown point (SDP) is 32.34%, and the discounted cash flow rate of return (DCFRR) is 16.51%. Based on these parameters, the glucomannan flour factory is economically feasible and profitable once it is operational.
Kata Kunci : ekstraksi, glukomanan, porang