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All Journal Reaktor Jurnal Teknik Kimia Jurnal Fisika Unand Journal of Natural Sciences and Mathematics Research Konversi Jurnal Kimia Riset CHEESA: Chemical Engineering Research Articles International Journal of Economics, Business and Accounting Research (IJEBAR) Jurnal Inovasi Teknik Kimia ASEAN Journal of Community Engagement G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Jurnal Pengbdian Teknik Mesin Journal Serambi Engineering (JSE) Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa JURNAL REKAYASA KIMIA & LINGKUNGAN
SRIE MULJANI
Program Studi Teknik Kimia, Fakultas Teknik & Sains, Universitas Pembangun Nasional “Veteran” Jawa Timur, Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Serambi Engineering

 1 
Pengolahan Limbah Yeast Mud Menjadi Pupuk Organik Padat Menggunakan Metode Composting Aerob Amelia Putri Kusherawati; Clareta Rahmawati Maudy; Ketut Sumada; Caecilia Pujiastuti; Srie Muljani
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Bioethanol is one of the alternative materials that can reduce dependence on non-renewable fuel oil. The process of making bioethanol produces by-products in the form of waste. Yeast mud is solid waste from the initial precipitation process of ethanol production. Yeast mud contains organic carbon of 39.33%, total nitrogen as nitrogen compounds of 1.76%, and a C/N ratio of 22. The organic carbon content contained in yeast mud exceeds the 2018 SNI value of a maximum of 32%. This study aims to determine the time needed to produce solid organic fertilizer in accordance with the Indonesian National Standard. The parameters used to determine the quality of solid organic fertilizer produced are C-Organic content, Nitrogen content, and C/N ratio. The method used in this research is aerobic composting with variations in the mass of yeast mud waste (1 kg; 2kg; 3 kg; 4 kg; and 5 kg) and variations in composting time (3; 4; 5; 6; 7 days), as well as an aeration rate of 1.5 l/min. The results showed that the C-Organic content that met the maximum SNI standard of 32% was obtained under the condition of a mass of yeast mud waste of 1 kg with a time of 5 days with a C-Organic content of 31.45% and a mass of yeast mud waste of 2 kg with a time of 7 days with a C-Organic content of 31.96%.
Sintesis dan Karakterisasi Al-MCM-41 dari Kaolin: Pengaruh Konsentrasi HCl terhadap Struktur dan Kapasitas Adsorpsi Iodin Abdullah, Affan Zein; Putri, Alisyah Ananda; Muljani, Srie; Nugraha, Reva Edra
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Al-MCM-41 can be synthesized using kaolin from Bangka Belitung without requiring additional sources of silica or aluminum. The process begins with calcination of kaolin to produce metakaolin, followed by HCl treatment for dealumination, which helps remove impurities and excess alumina. This step is crucial to achieve the optimal SiO₂/Al₂O₃ mole ratio, making the material effective as an adsorbent or catalyst. The hydrothermal process enhances silica polymerization and pore formation due to the strong electrostatic interactions between CTAB and silicate anions, increasing the pore size. The mesoporous structure and SiO₂/Al₂O₃ ratio of Al-MCM-41 are influenced by the CTAB concentration and the extent of dealumination through HCl treatment. In this synthesis, CTAB acts as a structure-directing agent, forming the hexagonal mesoporous framework, while HCl concentration regulates the removal of alumina from kaolin. To optimize the process, HCl concentrations of 2M, 4M, and 6M were tested to evaluate the extent of alumina and impurity removal. The 6M HCl treatment produced a SiO₂/Al₂O₃ ratio of 25.359, which aligns with the commercial Al-MCM-41 standard from ACS Material. Additionally, the iodine adsorption test demonstrated significantly higher adsorption capacity (653.14 mg/g) for Al-MCM-41 compared to kaolin (76.2 mg/g).
Pengolahan Limbah Cair Laundry Menggunakan Aluminium Sulfat dari Fly Ash dengan Metode Koagulasi - Flokulasi Adelita Sidabutar; Utami, Noni Esti; Srie Muljani; Caecillia Pujiastuti; Sani
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Laundry wastewater poses thousand risk for the environment and microbes due to its detergent content that remain the same from washing process using detergent and any other substance. These detergents can trigger various issues such as eutrophication in rivers and health problems caused by their chemical components. Therefore, further treatment is necessary to ensure the wastewater meets quality standards and is safe for discharge into the environment. Fly ash, which contains a high concentration of aluminum, can be utilized through a synthesis process to produce alum. This alum is then applied in coagulation–flocculation processes to reduce pollutants in laundry wastewater, such as BOD, COD, and TSS. This study aims to determine the optimal dosage and contact time of fly ash alum in treating wastewater to meet quality standards, using dosage variations of 30, 40, 50, 60, and 70 mL and flocculation times of 45, 55, 65, 75, and 85 minutes. The results of the treatment using fly ash alum are then compared with those using commercial alum to identify the most effective treatment. Consequently, the synthesis and treatment process not only contribute to wastewater management but also offer an alternative solution for coagulant and flocculant materials.
Optimasi Konsentrasi HCl Dan Suhu Kalsinasi Terhadap Yield Produk MgCl2 Dari Bittern Annisa, Nur; Diah Nur Fitri Midayoga; Lilik Suprianti; Srie Muljani
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The brine solution remaining after salt crystallization contains high levels of valuable minerals, particularly magnesium, which can be extracted and processed into magnesium chloride (MgCl₂), a compound widely used in various industrial applications. This study examines the effect of hydrochloric acid (HCl) concentration and calcination temperature on the yield of MgCl₂ synthesized from brine-derived magnesium hydroxide. Magnesium hydroxide was precipitated using sodium hydroxide and subsequently reacted with HCl solutions of varying concentrations (1N–5N) before being calcined at temperatures ranging from 350°C to 550°C. The results show that both HCl concentration and calcination temperature significantly influence the product yield. The highest yield, 80.07%, was obtained at an HCl concentration of 4N and a calcination temperature of 550°C. While increasing acid concentration and temperature generally improved yield, concentrations above 4N did not provide further benefits and instead tended to decrease efficiency. These findings highlight key processing parameters for optimizing MgCl₂ production from brine, contributing to more efficient resource utilization and environmentally sustainable mineral processing practices.
Co-Authors A.R Yelvia Sunarti Abdullah, Affan Zein Adelita Sidabutar Agustina, Meri Ajiz, Hendrix Abdul Amalia, Ayu Rizka Amelia Putri Kusherawati Anggelina, Efline Anggoro, Achmad Rahditya Viman AR Yelvia Sunarti Arianti, Rahma Dea Rerindra Astuti, Dwi Hery Bambang Wahyudi Bambang Wahyudi Wahyudi Caecilia - Pujiastuti Caecilia Pujiastuti Caecillia Pujiastuti Cahyo, Mei Syella Kurnia Putri Candra, Adi Clareta Rahmawati Maudy Damayanti, Savira Farizqy Darma, Apriandi Putra Diah Nur Fitri Midayoga Dwi Hery Astuti Dyah Suci Perwitasari Erliyanti, Nove Kartika Erwan Adi Saputro Faiqoh, Iklimatul Farida Pulansari Heru Setyawan Indah Dwi Wahyuningsih Isni Utami ISNI UTAMI J.E. Sutanto JE Sutanto Ketut Sumada Kindriari Nurma Wahyusi Kusuma, Kurnia Arifiani L.Urip Widodo, Yohandrik Novel Karaman Luluk Edahwati Maharani, Eka Ferdinda Putri Ayu Matovanni, Maudy Pratiwi Novia Maulana, Mochamad Titus Mega Rosilina Mega Rosilina Moch Iqbal Darmawan Mochamad Titus Maulana Mochamad Titus Maulana Mu’tasim Billah Nana Dyah Siswati, Anwar Zain and Mohammad Nicander, Priscillia stevanies Nofitasari, Luluk Novanto, Satria Agung Nove Kartika Noviardyanti, Fara Zabrina Nur Annisa Nur Hapsari Pamoedji, Yemima Natalia Eka Kristiyanti Pangestu, Titan Obby Pertiwi, Beta Cahaya Pradana, Alfian Rizki Prasetyo Hadi Prasetyo, Muhammad Dewa Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia - Putri, Alisyah Ananda Ramadhan, Mochamad Rafli Reva Edra Nugraha Rifaldi, Kornelius Rosilina, Mega S Suprihatin Sani Sani Sari, Amilia Putri Puspita Silviya Nur Ridha Sintha Soraya Santi Sri Redjeki Sukirmayadi Sukirmayadi Sunarti, A.R Yelvia Suprianti, Lilik Suprihatin Suryandari, Ade Sonya Susilowati sutiyono sutiyono Titi Susilowati Utami, Noni Esti Verbiawan, Erza Anggara Wahyu Hidayah Widiyastuti Widiyastuti Widyaningrum, Nilam Putri Wiraya, Wira Arta Wisnu Adi Prasojo Yulia S, Putri Arysanti