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All Journal Jurnal Ilmiah Teknik Mesin CYLINDER Jurnal Ilmiah Teknik Industri Jurnal Sistem Teknik Industri
Djoko Setyanto
Universitas Katolik Indonesia Atma Jaya
Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ANALISIS KERUSAKAN DAN KEKUATAN TANGKI GFRP SLUDGE TANK PADA KILANG MINYAK SAWIT Djoko Setyanto
CYLINDER Vol 1, No 2 (2014): Oktober 2014
Publisher : Cylinder: Jurnal Ilmiah Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.533 KB)

Abstract

The main consideration for choosing glass fiber reinforced polymer (GFRP) tank for chemical fluid vessel is the corrosion resistance property of the material. There are leakages on one of the three sludge palm oil GFRP tanks after two years operation in a palm oil refinery industry at East Borneo (Kalimantan Timur). The structure of the tank body consists of chemical barrier laminate and structural laminate. The chemical barrier laminate is composed of bisphenol as matrix with surfacing veil and three laminates chopped strand mat as reinforcement, while the structural laminate is made of isophthalic as matrix with filament winding as reinforcement. This paper discusses the failure and strength analysis of the tank structure and the results are used to make a decision for reconditioning the three GFRP sludge palm oil tanks. Wrinkle and resin pocket near the inner surface of the tank when exposed to sludge palm oil at temperature over than 90 OC caused the matrix to become hard and brittle. The flow circulation of the sludge palm oil in the tank caused crack on defect area, which then followed by orange peel, pinholes, and porosity defects. The pinholes and porosity defects spread to the deeper layers towards the outer wall and caused further leaking. Strength analysis of the tank based to ASTM D3299 showed that the actual body tank thickness and the actual knuckle thickness are less than the minimum one millimeter and fifteen millimeters requirement, respectively. Finally, reconditioning of the three GFRP sludge tanks were done by adding surfacing veil and five laminates of chopped strand mat layers with vinyl ester resin on the inside of the wall and the bottom. Moreover, the additional layers were given manually on the knuckle by hand lay-up method.
Design of Affordable Cold Storage for Horticulture Products (Urban Farming “Mom's Farm” in Sampora Village) Ferdian Suprata; Christine Natalia; Djoko Setyanto; Budi Kartadinata; Victoria Principall
Jurnal Ilmiah Teknik Industri Vol. 21, No. 1, June 2022
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v21i1.13926

Abstract

Growing the world’s population to almost 9.7 billion by 2050 will continue to address the challenges facing the food and agriculture sector. The aim of this study is to reduce food losses in Sampora Village, Cisauk – South Tangerang by creating an affordable cold-storage of Modified Atmosphere Storage (MAS) equipment with a capacity of 4.77 m3 so that it can increase the quality of food for a longer period without deterioration of the horticultural products stored. Temperature control, humidity control, air circulation, maintenance of space between containers for adequate ventilation, total capacity, dimensions, efficiency, development costs, durability, performance, and features are involved in the design. This cold storage is designed with a Design Thinking method. A qualitative research was conducted through interviews to gain insight and synthesize the needs. The selection prototype concept was chosen by the Pugh Matrix and finally this study proposed in an affordable cold-storage technology.
Model Formulation for Estimating Oil Extraction Rate to Measure Oil Extraction Efficiency in Palm Oil Mill M Hudori; Isdaryanto Iskandar; Djoko Setyanto
Jurnal Sistem Teknik Industri Vol. 25 No. 1 (2023): JSTI Volume 25 Number 1 January 2023
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v25i1.10596

Abstract

FFB that has high HQE and FCI will determine the OER that will be obtained at POM, so that OER can be estimated using HQE and FCI, ie by calculating the oil content in FFB and the potential for oil loss in loose fruit that is not collected in the plantation area. The purpose of this study was to formulate an OER estimation model to determine the processing efficiency of POM. This research is a qualitative and quantitative analysis research, which is a scientific study to formulate an OER estimation model based on HQE and FCI parameters which will be used as the dependent variable. Based on the results and discussion it can be concluded that OER, which is a parameter of oil palm processing performance at POM, can be estimated using a model formulation developed from HQE and FCI variables, where these variables are indicators of FFB harvesting performance in oil palm plantations.
Co-Authors Christine Natalia Ferdian Suprata Irfa Kodri Isdaryanto Iskandar Isdaryanto Iskandar Kartadinata, Budi M Hudori Victoria Principall