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Jawa timur
INDONESIA
Jurnal Teknik Kimia
Published by Universitas Pembangunan Nasional Veteran Jawa Timur
ISSN : 19780419     EISSN : 26558394     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Teknik kimia fokus pada proses perpindahan panas dan massa, material maju, teknik reaksi kimia, pengolahan dan pengelolaan limbah, biomassa dan energi, termodinamika, biokimia, elektrokimia, perancangan dan pengendalian proses, proses pencampuran dan pemisahan. Rung lingkup (Scope) Jurnal Teknik Kimia meliputi semua aspek yang berhubungan dengan bidang teknik kimia, ilmu kimia. dan semua proses reaksi kimia.
Arjuna Subject : -
Articles 274 Documents
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PENGARUH DEBIT DAN RECYCLE MIKROBA AEROB PADA PENGOLAHAN LIMBAH KERUPUK UDANG DENGAN KONTAK-STABILISASI Setiani, Astri; Safira, Lutfia Rima; Sumada, Ketut; Susilowati, Titi; Perwitasari, Dyah Suci
Jurnal Teknik Kimia Vol 19, No 2 (2025)
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v19i2.5075

Abstract

Industri kerupuk udang merupakan sektor yang memiliki potensi untuk menghasilkan limbah dan mengakibatkan pencemaran lingkungan terutama lingkungan perairan disekitar industri. Limbah kerupuk udang memiliki kadar COD dan BOD yang tinggi, jika limbah tersebut dibuang ke lingkungan tanpa adanya pengolahan, maka akan menimbulkan banyak masalah bagi lingkungan seperti terganggunya ekosistem sungai sekitar. Penelitian ini bertujuan untuk mengurangi kadar COD, BOD, dan menetralkan pH serta mengetahui pengaruh debit limbah masuk dan debit recycle mikroba aerob pada pengolahan limbah industri kerupuk udang menggunakan teknologi kontak-stabilisasi. Proses pengolahan dilakukan menggunakan dua kondisi operasi yang divariasikan yaitu debit limbah masuk sebesar 8liter/jam ; 10liter/jam ; 12liter/jam ; 16liter/jam ; 24liter/jam dan debit recycle mikroba yang divariasi sebesar 4liter/jam ; 5liter/jam ; 6liter/jam ; 8 liter/jam ; 12 liter/jam. Penurunan kadar COD dan BOD paling optimum pada debit limbah masuk 8 liter/jam dan debit recycle mikroba 12liter/jam dengan penurunan kadar COD sebesar 94.10% dan penurunan BOD sebesar 95.48%. Hal ini menunjukkan bahwa semakin kecil debit limbah masuk, maka penurunan kadar COD dan BOD semakin besar. Sementara itu, semakin besar debit recycle mikroba aerob maka penurunan kadar COD dan BOD semakin besar.
REDUCTION OF LEAD (Pb) LEVELS IN RED KUPANG (MUSCULISTA SENHAUSIA) USING WULUH STARFRUIT (AVERRHOA BILIMBI) EXTRACT Ningrum, Devy Shinta; Darmawan, Dewangga Haris; Suprihatin, Suprihatin; Nandini, Atika
Jurnal Teknik Kimia Vol 19, No 2 (2025)
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v19i2.5139

Abstract

Red kupang (Musculista senhausia) is one of the protein-rich fisheries resources that is widely consumed by the population. However, red kupang contains a significant amount of heavy metal. This can be harmful to people if consumed in the long term and not processed properly. The boiling method that has been used to remove heavy metals is not effective, especially for reducing the levels of lead (Pb), which is difficult to dissolve in water. The accumulation of lead (Pb) in red kupang can be reduced by extracting it using citric acid, a chelating agent. This study aims to determine the effect of differences in citric acid concentration (0.5%v/v, 1%v/v, 1.5%v/v, 2%v/v, and 2.5%v/v) from starfruit juice solvent and stirring speed (150 rpm, 180 rpm, 210 rpm, 240 rpm, and 270 rpm) in the solid-liquid extraction method (leaching) on lead (Pb) levels in red kupang. Analysis of lead (Pb) levels was carried out using AAS. The analysis results showed that the levels of lead (Pb) tended to decrease as the stirring speed and citric acid concentration increased. The best results were obtained at a citric acid concentration of 2.5%v/v and a stirring speed of 210 rpm, which resulted in a residual lead (Pb) levels of 0.251 mg/kg. The results are in accordance with SNI 7387:2009, which states that the limit for lead metal contamination in food is 1.5 mg/kg.
KINETIKA REAKSI HIDROLISIS ENZIMATIS SELULOSA MENJADI GLUKOSA DARI KULIT DURIAN (DURIO ZIBETHINUS RUMPH) MENGGUNAKAN ENZIM SELULASE Maharani, Eka Ferdinda Putri Ayu; Agustina, Meri; Redjeki, Sri; Muljani, Srie; Pujiastuti, Caecilia
Jurnal Teknik Kimia Vol 19, No 2 (2025)
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v19i2.5155

Abstract

The production of durian in Indonesia causes pollution of the environment by durian skin waste, so it is necessary to utilize durian skin. Durian skin contains 50-60% cellulose, 5% lignin, 5% starch, and other compounds.  The cellulose content in durian peel is utilized for making glucose by enzymatic hydrolysis method carried out under pH 5 conditions, 10% cellulase enzyme concentration, 50oC temperature, and 160 rpm stirring speed. Optimization of the enzymatic hydrolysis process depends on understanding the reaction kinetics that provide information about the reaction rate and conversion efficiency. This study aims to determine the reaction kinetics equation of enzymatic hydrolysis of cellulose to glucose from durian peel using cellulase enzyme and determine the effect of substrate concentration and hydrolysis time on product concentration. Substrate concentration and hydrolysis time have a directly proportional relationship to product concentration. At 5% substrate concentration and 180 minutes, the highest product concentration of 1.7% was obtained. This study was conducted with hydrolysis times of 60, 90, 120, 150, and 180 minutes and variations in substrate concentrations of 1%, 2%, 3%, 4%, and 5%. The conversion of enzymatic hydrolysis of cellulose to glucose at 1% substrate concentration was 69.43% with a reaction rate equation of
STUDY OF KINETIC MODELING FOR SEA WATER IMPURITIES REMOVAL (SO4) USING DISODIUM PHOSPHATE (NA2HPO4) AND CALCIUM CHLORIDE (CACL2) Pujiastuti, Caecilia; Rohmah, Aisyah Alifatul Zahidah; Muchammad, Raka Selaksa Charisma; Sumada, Ketut
Jurnal Teknik Kimia Vol 19, No 2 (2025)
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v19i2.5157

Abstract

Salt is an essential mineral for human life, typically containing NaCl along with various impurities such as Mg²⁺, SO₄²⁻, and K⁺. The production of industrial-grade salt can be achieved through chemical treatments to bind these impurities. This study aims to investigate the kinetics of Sulphate (SO4) precipitation in order to lower impurities concentrations in seawater (Mg²⁺, SO₄²⁻, and K⁺), which is used as raw material for salt production, by adding chemical agents disodium phosphate (Na₂HPO₄) and calcium chloride (CaCl₂), each at a concentration of 2N. The research was conducted using continuous stirred tank technology with a stirring speed of 100 rpm and a solution pH of 9. The kinetics of impurity reduction in seawater were simulated using mathematical formulations, specifically pseudo-first-order and pseudo-second-order models. The results indicated that the process achieved the best outcomes with the addition of SO₄ solution, resulting in the highest removal value of 757.86 mg/L compared to others. Additionally, this correlated with an R² value close to 1 for the second-order kinetics, specifically 0.9871.

Page 28 of 28 | Total Record : 274

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