AIRBORNE GAS CONTROLLER REDESAIN UNITS IN RAYON FIBER INDUSTRY, PT X, PURWAKARTA, WEST JAWA

• Main Author: Vegadianti, Mutia
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/36861
• Institution: Institut Teknologi Bandung

The waste gas produced by PT X contains high levels of H2S and CS2 so it must be processed first before being discharged into the environment. Waste gas processing is focused on the recovery of gases for reuse. Carbon disulfide is a material needed in the production process and is obtained from waste gas treatment in carbon disulfide adsorption plant (CAP). CAP takes back CS2 from waste gas through the adsorption process on activated carbon. When there are only 3 adsorber operating, with one of them desorption, the CS2 recovery capacity of CAP decreases. As a result, the gas discharge that can be handled decreases so that emissions do not exceed the set target, so that CS2 production from CAP also decreases. To overcome this problem, a redesign of the CAP is needed by adding one C01 adsorber unit. The alternative adsorber used is a fixed bed type and fluidized bed adsorber. Based on the weighting results, the selected unit is a fixed bed type adsorber. The results of the C01 adsorber design with the adsorption time designed for 6 hours required a carbon mass of 18,434 tons. Selected horizontal adsorber which is more stable in construction, with dimensions of 5.4 meters in diameter and 6 meters in length. Steam is needed at 6,841,134 kg / regeneration. The entry into operation of the C01 adsorber came from the savings in CS2 purchases of Rp 1,055,940,000.00 per year. Initial investment costs of Rp 1,656,665,111.78 and annual costs of Rp. 347,242,556.47. The results of the calculation of project feasibility with the Net Present Value (NPV) obtained a value of Rp. 3,559,409,765.70.