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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Bioprocess Chemical and Environmental Engineering Science
Fikri Miftahul Shiddiq
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Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Prarancangan Pabrik Etilen Dari Cracking Nafta Dengan Proses Maxene Fikri Miftahul Shiddiq; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Ethylene produced by cracked the chain of various componen in naphtha. n-paraffin is preferable for thermal cracking reactor feed to produce ethylene. MaxEne process help to result n-paraffin rich stream as feed to thermal cracking reactor. The main equipment of MaxEne process is adsorbent chamber with n-butane as desorbent agent and two debutanizer, one of them is debutanizer extract column and the other one is debutanizer raffinate column. The purpose of this study is to determine the chemical design and mechanical design of debutanizer raffinate column also the economical analysis of plant. The chemical design of debutanizer raffinate column such us determination of the number of tray is using fenske methode. The main mechanical design of  debutanizer raffinate column is to determine the design of support and flange. The economical analysis of the plant is determination of Cumulative Cash Ratio (CCR) and Present Value Ratio (PVR). The number of tray is 34. The heigt and diameter are 38,42 and 5,9 m respectively. The type of skirt is conical skirt with angle 83° to the base ring. The Thickness of the flange joint the head with shell is 0,85 m. The value of Cumulative Cash Ratio (CCR) and Present Value Ratio (PVR) are 2.2 and 1.29 respectively. Keywords : maxene, ethylene, thermal cracking, desorbent, n-paraffin
Kultivasi Mikroalga Chlorella sp. Secara Fed-Batch Menggunakan Limbah Cair Tahu Untuk Produksi Lipid Sri Rezeki Muria; Fikri Miftahul Shiddiq; Irma Damayanti; Indra Purnama
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 4 No 1 (2023): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, UNRI

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Microalga is single cell organism that can live by photosynthesize resulting biomass and other secondary product such as protein, carbohydrate, and lipid by utilizing nutrients in wastewater. This study aims to get the data about the effect of additions of tofu liquid waste to the growth and increase of lipid content in the microalga that cultivated in tofu liquid waste media. Microalga were cultivated by variations in tofu liquid waste adding. The variations are 0,45 liter in every day, 0,9 liter in every two days, and 1,35 liter in every three days. Microalga growth were measured by an object glass, the amount of cell density in every square field calculated using tomacytometer with hand counter where observed under optical microscope. Total lipid content were gained by employ Bligh-dyer methode. The results of this study show the highest specific grow rate of Chlorella sp is 0,08692/day accounted from tofu liquid waste addition in every three days. The highest lipid content is 40,88 % which gained from tofu liquid waste addition in every day. Under unfavourable condition microalga will accumulate more lipid so that increase it lipid content. The highest chemical oxygen demand (COD) removal is 575 mg/mL.
Co-Authors Indra Purnama Irma Damayanti Komalasari Komalasari Sri Rezeki Muria