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All Journal Jurnal Sumberdaya Alam dan Lingkungan International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Nugroho, Sutra Amelia
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Agriculture, Biological Sciences & Forestry Automotive Engineering Earth & Planetary Sciences Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ASSESSING AND OPTIMIZING THE PERFORMANCE OF A SHELL AND TUBE HEAT EXCHANGER (E-2502) IN PHOSPHORIC ACID PRODUCTION: A CASE STUDY AT PT. PETROKIMIA GRESIK Saputro, Erwan Adi; Lutfiananda, Delfian; Pratiwi, Annisa Kurnia; Nugroho, Sutra Amelia
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 1 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.01.3

Abstract

PT. Petrokimia Gresik, established with a construction contract on August 10, 1964, stands as Indonesia's most comprehensive fertilizer factory. The company comprises various departments, including the Production Department IIIA, specializing in Phosphoric Acid Production. The objective of assessing the efficiency of a shell and tube cooler-type heat exchanger is to evaluate its performance, determining compliance with design specifications and identifying the need for cleaning and maintenance. The utilized heat exchanger, of the shell and tube type, employs water as its cooling source. According to design calculations conducted between September 13 and September 18, 2023, the expected efficiency of the cooler-type heat exchanger is 91.44%. However, actual data analysis over six days reveals a significant drop in efficiency, registering below 50%. A comparison between design and actual data suggests a decline in efficiency for the E-2502 cooler type. The decrease is attributed to substantial scaling in the E-2502 Heat Exchanger, stemming from the cooled P2O5 Acid solution and resulting in deposition during the heat transfer process. Consequently, it is imperative to initiate a cleaning process for the cooler-type heat exchanger to optimize the heat transfer mechanism.
Studi Kinetika Adsorpsi Limbah Zat Warna Metilen Biru Menggunakan Grafen Oksida dari Karbon Limbah Baterai Fadhila, Dheytra Akhnaz Namira; Nugroho, Sutra Amelia; Perwitasari, Dyah Suci; Nugraha, Reva Edra; Aziz, Abdul; Jovita, Stella; Utami, Diana Inas; Damayanti, Nabilla
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2024.011.02.4

Abstract

ABSTRAK Perkembangan industri tekstil menjadi salah satu penyumbang terbesar limbah zat warna ke lingkungan yang berdampak pencemaran terhadap sumber air. Hal ini dikarenakan melalui hasil pengamatan langsung di lapangan kondisi air limbah yang dibuang masih berwarna pekat dan berbau. Penelitian ini bertujuan untuk mempelajari kinetika adsorpsi zat warna metilen biru menggunakan adsorben grafen oksida yang disintesis dari limbah baterai. Metode hummer digunakan dalam sintesis grafen oksida melalui penambahan asam sulfat. Studi kinetika adsorpsi dilakukan pada konsentrasi metilen biru 10-50 ppm serta variasi waktu adsorpsi 5-25 menit. Kondisi optimum diperoleh pada pada konsentrasi metilen biru 30 ppm dengan waktu 25 menit. Mekanisme adsorpsi yang terjadi mengikuti model Langmuir nilai R2 sebesar 0.92522 dengan nilai Qm= 99.1 mg.g-1 dan nilai K=0.325. Kata kunci: adsorpsi, graphene oxide, jurnal, teknik lingkungan ABSTRACT  The development of the textile industry is one of the main sources of dye waste I the environment, which means that the discharged wastewater is still concentrated and smelly when observed directly on the ground, thus contributing to water pollution. The aim of this study is to determine the relationship between the concentration of methylene blue dye and the adsorption time and to determine the adsorption isotherm. For the synhesis of graphene oxide, the hummer’s method was used where graphite wes recombined with H2SO4 sulfuric acid and the adsorbed solution was measured using UV-Vis spectrophotometer. Graphene oxide acted as an adsorbent by adsorbing methylene blue and the result showed that he optimum time and concetration was acheieved at a 30 ppm and 25 minutes.  The adsorption mechanism aligns with the Langmuir model, demonstrated by an R2 value of 0.92522, a Qm value of 99.1 mg.g-1, and a K value of 0.325. Keywords: adsorption, environmental engineering, graphene oxide, journal  
Co-Authors Abdul Aziz Damayanti, Nabilla Dyah Suci Perwitasari, Dyah Suci Erwan Adi Saputro Fadhila, Dheytra Akhnaz Namira Jovita, Stella Lutfiananda, Delfian Nugraha, Reva Edra Pratiwi, Annisa Kurnia Utami, Diana Inas