Perpustakaan Digital ITB

Over 306 hectares of water hyacinth cover the Duriangkang reservoir annually, with over 6 tons of water hyacinth collected weekly. This proliferation disrupts the dam's environmental balance, necessitating a solution. The utilization of a wet torrefaction process reactor that can transform water hyacinth into a new alternative product can be one solution to address the water hyacinth issue in Duriangkang. However, the alternative reactor used (Linda, 2022) showed design failures during the wet torrefaction process, necessitating the design of a reactor that are both appropriate and capable of operating on a large scale safely. The design of the wet torrefaction reactor was conducted based on ASME standard and the requirements of operational parameters, with 200 °C and 10 bars as the operating conditions with total of 6.5 tons water hyacinth collected per day. Preliminary experiments were performed to obtain similarity characteristics in wet torrefaction product, and the results indicate similarity in the products. The design process included the reactor and reactor accessory design. The results of the design analysis indicated that the final stress conditions have the highest value at 109.4 MPa with a safety factor of 2.19 for the reactor head and the highest stress value of 78.81 with a safety factor of 2.73 for the reactor wall. The accessory design followed appropriate design standards resulting in a safe condition for use during operational conditions. The final evaluation was in the form of a design assessment based on the comprehensive design analysis of the reactor. Simulations and designs on reactor parts and accessories on operating parameters of all designed components indicate that safe conditions have been met. Based on these findings, the design results of the wet torrefaction reactor can operate in the desired conditions safely, with a reduction of reactor mass and thickness ranging between 45-47%, to reduce the capital cost of the existing reactor.