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All Journal JOURNAL ONLINE OF PHYSICS Jurnal Rekayasa Material, Manufaktur & Energi SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Menara: Jurnal Teknik Sipil Jurnal Inovasi Pendidikan dan Sains Equilibrium Journal of Chemical Engineering Archipelago Engineering CHEMTAG Journal of Chemical Engineering Jurnal Sains dan Teknologi Jurnal Pengabdian Pada Masyarakat Warta LPM Jurnal Teknologi Kimia Mineral Journal of Fundamentals and Applications of Chemical Engineering Journal of Green Chemical and Environmental Engineering
Alif Nur Laili Rachmah
Universitas Pattimura
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BIOETHANOL FROM CHEESE WASTE (WHEY) USING KLUYVEROMYCES MARXIANUS Alif Nur Laili Rachmah; Ratri Sekaringgalih; Binti Ruliana; Ansori Ansori
Jurnal Inovasi Pendidikan dan Sains Vol 4 No 3 (2023): December
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Nahdlatul Wathan Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jips.v4i3.1799

Abstract

Alternatives to petroleum scarcity are of much concern to researchers. The development of bioethanol is one of the renewable energies that must be supported by research from various sources of raw materials so that it can be converted into bioethanol. Generally, the raw material of bioethanol used contains sugar and starch. if biomass used sugar cane and cassava then the availability of food will also be threatened. Therefore one of the alternative raw materials that can be used is industrial waste cheese (whey). Whey is the side of the product cheese industry, which contains 4-5%. The aim of the study is to optimate whey fermentation to the production of bioethanol using Kluyveromyces marxianus with the variation of time and starter volume. Bioethanol production with raw material lactose which is contained in whey used Kluyveromyces Marxianus with variabel changed time fermentation and starter volume. For time fermentation variables are 24, 48, 60, 72 dan 84 hours, and for volume starter variabel are 20%, 22%, dan 24% v/v. The highest content of bioethanol production used Kluyveromyces Marxianus on variable starter volume 24% at time 84 hours was obtained 0,32% bioethanol content with pH 3,5
RESPONS PERTUMBUHAN CHLORELLA sp. TERHADAP PENAMBAHAN LIMBAH CAIR ORGANIK PADA MEDIUM KULTIVASI Geraldi Rahanra; Ivonne Telussa; Ervina Rumpakwakra; Alif Nur Laili Rachmah; Sabrianah Baddarudin; Tamaratritania Citta Trisnantari; Muhammad Ikhsan Taipabu
CHEMTAG Journal of Chemical Engineering Vol 7, No 1 (2026): CHEMTAG Journal of Chemical Engineering
Publisher : Universitas 17 Agustus 1945 (UNTAG) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/cjce.v7i1.7040

Abstract

Limbah cair pengolahan sagu dan tahu mengandung nutrien yang berpotensi dimanfaatkan untuk kultivasi Chlorella sp. Karakterisasi meliputi pH, Chemical Oxygen Demand (COD), total karbon (TC), total nitrogen (TN), dan total fosfor (TP), kemudian limbah cair ditambahkan ke dalam medium NaCl salinitas 28 ppt. Kultivasi dilakukan selama 24 hari pada intensitas cahaya 5000 lux dengan fotoperiode 12:12 jam. Air limbah pengolahan tahu menunjukkan kandungan nutrien lebih tinggi dibandingkan air limbah pengolahan sagu, dengan COD masing-masing 23,49 mg/L dan 12,65 mg/L. Konsentrasi sel maksimum diperoleh pada medium kontrol (MK) sebesar 38 × 10⁵ sel/mL (hari ke-21), diikuti perlakuan suplementasi air limbah pengolahan tahu (MLT) sebesar 34 × 10⁵ sel/mL dan air limbah pengolahan sagu (MLS) sebesar 24,9 × 10⁵ sel/mL. Suplementasi limbah cair tidak meningkatkan pertumbuhan dibandingkan kontrol, yang dapat dipengaruhi oleh kondisi pH asam, rasio C:N yang rendah, serta salinitas tinggi yang berpotensi menimbulkan stres osmotik. Meskipun demikian, kedua jenis limbah tetap mampu mendukung pertumbuhan mikroalga dan menunjukkan potensi integrasi kultivasi mikroalga dengan pengolahan limbah cair secara berkelanjutan.
Peningkatan keterampilan siswa melalui pelatihan pengolahan limbah ampas sagu menjadi pupuk organik cair di SMAS Muhammadiyah Mamala, Maluku Tengah Alif Nur Laili Rachmah; Sabrianah Badaruddin; Tamaratritania Citta Trisnantari; Geraldi Rahanra; Muhammad Ikhsan Taipabu; Charis Gladi Iman Makoy
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 2 (2026): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i2.38675

Abstract

Abstrak Desa Mamala, Kabupaten Maluku Tengah, menghasilkan limbah ampas sagu dalam jumlah besar yang belum dimanfaatkan secara optimal dan berpotensi mencemari lingkungan. Padahal, limbah tersebut memiliki kandungan bahan organik yang tinggi sehingga berpotensi diolah menjadi pupuk organik cair (POC) yang ramah lingkungan dan bernilai ekonomi. Kegiatan pengabdian kepada masyarakat ini dilaksanakan oleh tim dosen dan mahasiswa Program Studi Teknik Kimia Universitas Pattimura dengan tujuan meningkatkan pengetahuan, keterampilan, serta kesadaran lingkungan siswa dan guru SMAS Muhammadiyah Mamala. Metode pelaksanaan meliputi koordinasi dengan pihak sekolah, sosialisasi pemanfaatan limbah ampas sagu, pelatihan pembuatan POC, serta evaluasi malalui penyebaran kuesioner. Hasil kegiatan menunjukkan peningkatan pemahaman dan keterampilan peserta, yang ditunjukkan oleh respon positif (sangat setuju dan setuju) sebesar 93,75%–100% pada sebagian besar indikator. . Antusiasme peserta sampasma pelatihan juga mendorong munculnya inisiatif pemanfaatan POC di lingkungan sekolah. Program ini berkontribusi dalam meningkatkan kesadaran lingkungan, memperkuat pembampasjaran berbasis potensi lokal, serta mendukung penerapan ekonomi sirkular di masyarakat. Kata kunci: ampas sagu; limbah organik; keterampilan siswa; pelatihan; pupuk organik cair. Abstract Mamala Village, Central Maluku Regency, produces a large amount of sago pulp waste that has not been optimally utilized and has the potential to cause environmental pollution. In fact, this waste contains high organic matter and has the potential to be processed into liquid organic fertilizer (LOF), which is environmentally friendly and economically valuable. This community service activity was conducted by lecturers and students from the Department of Chemical Engineering, Pattimura University, with the aim of improving the knowledge, skills, and environmental awareness of students and teachers at SMAS Muhammadiyah Mamala. The implementation methods included coordination with the school, socialization on the utilization of sago pulp waste, technical training on the production of LOF, and evaluation through questionnaires. The results of the activity indicate an improvement in participants’ understanding and skills, as evidenced by positive responses (strongly agree and agree) ranging from 93.75% to 100% across most indicators. . Participants’ enthusiasm during the training also encouraged initiatives to utilize LOF within the school environment. This program contributes to enhancing environmental awareness, strengthening learning based on local potential, and supporting the implementation of a circular economy in the community. Keywords: sago waste; organic waste; student skills; training; liquid organic fertilizer.
Performance Analysis of a 1-1 Shell-and-Tube Intercooler for Compressed Air Cooling Systems Farida Diyah Hapsari; Hana Nikma Ulya; Esther Mutiara Santallum Ekklesia Tibalia; Sabrianah Badaruddin; Alif Nur Laili Rachmah
Equilibrium Journal of Chemical Engineering Vol 10, No 1 (2026): Volume 10, No 1 July 2026 (First Online)
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v10i1.116048

Abstract

This study presents an evaluation of a 1-1 shell-and-tube heat exchanger (Intercooler-2) utilized in a multi-stage air compressor. The evaluation was conducted using plant operational data and classical heat exchanger analysis methods, including heat balance, overall heat transfer coefficient under clean (Uc) and operating (Ud) conditions, dirt factor (Rd) and pressure drop (ΔP). The calculation results show a heat transfer rate of 557,640.622 Btu/h with a true temperature difference of 113.774 °F, indicating an adequate thermal driving force. The flow on the shell side is in the turbulent regime (Re ≈ 79,952), while the tube side shows laminar flow (Re ≈ 829), which limits the optimization of convective heat transfer of water as a cooling medium. The overall heat transfer coefficient under clean conditions of 25.627 Btu/h.ft².°F decreased to 23.125 Btu/h.ft².°F due to a fouling factor (Rd) of 0.004. The pressure drop values on both sides are still well below the permitted limits, so the unit is declared operationally feasible. However, the presence of fouling and laminar flow regime on the tube side indicates the potential for performance improvement thru optimization of water flow rate and periodic cleaning. This study emphasizes the importance of periodic performance evaluation to maintain the efficiency and reliability of heat exchanger operations in air compression systems.
Pengaruh Substitusi Abu Bonggol Jagung sebagai Pozzolan pada Semen Portland Komposit terhadap Kuat Tekan Mortar Alif Nur Laili Rachmah; Binti Ruliana; Sabrianah Badaruddin; Ratih C F Ratumanan; Ronald Darlly Hukubun
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6142

Abstract

The effect of additive corn cob ash (CA) on Portland Composite Cement (PCC) on the compressive strength of the mortar is influenced by pozzolan. The material that makes up pozzolan is silica. Corn cobs are agricultural waste that contains silica and every year continue to increase, so corn cob waste is as an additional material to Portland Composite Cement (PCC). This study was conducted to determine the compressive strength value of mortar using additive corn cob ash (CA) and corn cob ash that has been washed with HCl 2N (CA*) and the feasibility of these additives as a PCC-type cement mixture. The weight percentages of additives used were 5%, 10%, and 15%, and the duration of the mortar compressive strength test was 3, 7, and 28 days. The experimental results showed that the compressive strength (σm) was highest at the addition of 5% additives, the effect of additives on compressive strength resulted in σm research > standard σm (SNI). The results of the activation index analysis obtained additive corn cob ash of 76% and corn cob ash+HCl 2N of 76.71%, the value is above the minimum limit according to ASTM C.618-99 which is 75%.
Proses Ekstraksi Antioksidan dari Daun Kalanchoe pinnata: Studi Pengaruh Ukuran Partikel dan Kinetika Maserasi Sabrianah Badaruddin; Alif Nur Laili Rachmah; Ratih C F Ratumanan; Ronald Darlly Hukubun; Tamaratritania Citta Trisnantari
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6183

Abstract

Kalanchoe pinnata leaves are rich in bioactive compounds, including flavonoids and phenolic constituents, which exhibit notable antioxidant properties. However, the efficiency of extraction processes is highly influenced by operational variables such as the type of physical pre-treatment and maceration duration. This study aims to evaluate the effect of three physical pre-treatment methods (manual grinding, chopping, and blending) and maceration periods ranging from 3 to 5 days on the antioxidant activity of K. pinnata leaf extracts using the DPPH radical scavenging assay. Results indicate that the grinding method combined with five days of maceration yields the highest antioxidant activity (95.04%), while blending leads to the lowest activity (81.78%), presumably due to heat-induced degradation of active compounds. Kinetic observations show that antioxidant activity tends to plateau on day five, particularly in ground samples. These findings highlight the critical influence of particle size reduction and solvent–solid contact time on mass transfer efficiency during extraction. This preliminary investigation provides a scientific basis for further research on the optimization of natural antioxidant extraction processes and the development of functional herbal formulations derived from K. pinnata leaves.
Optimization of Biodegradable Films from Avocado Seed Starch Using Response Surface Methodology Alif Nur Laili Rachmah; Sabrianah Badaruddin; Tamaratritania Citta Trisnantari; Geraldi Rahanra; Ratri Sekaringgalih
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.23

Abstract

This study aimed to develop and optimize biodegradable films based on avocado seed starch (Persea americana) using glycerol as a plasticizer and chitosan and carrageenan as fillers. The film formulation was optimized using Response Surface Methodology (RSM) with a Box–Behnken Design to evaluate the effects of formulation variables on biodegradability and mechanical properties. The biodegradability values ranged from 31.93 % to 51.94 %, indicating that all films were biodegradable. Increasing glycerol and carrageenan concentrations significantly increased biodegradability, while higher chitosan concentration improved tensile strength but reduced biodegradability. The optimal formulation was obtained at 2.96 % glycerol, 1.56 % chitosan, and 2.85 % carrageenan, with a predicted biodegradability of 53.11 %. The results indicate a trade-off between mechanical strength and biodegradability, where higher plasticizer content enhances degradation but reduces tensile strength. This study demonstrates that RSM optimization is effective in producing biodegradable films with balanced mechanical and environmental performance, highlighting the potential of avocado seed starch as a sustainable packaging material.
Technical Assessment and Optimization of Off-Gas Cooling in Nickel Matte Pyrometallurgy Based on Carbon Variation Sabrianah Badaruddin; Alif Nur Laili Rachmah; Muhammad Ikhsan Taipabu; Farida Diyah Hapsari; Esther Muatiara Santallum Ekklesia Tibalia
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.21

Abstract

Exhaust gas emission management is a critical aspect of pyrometallurgical nickel smelting because it directly affects energy efficiency, operational safety, and overall process sustainability. This study investigates the influence of calcine carbon content on exhaust gas formation and determines the required cooling air volume in an industrial electric furnace operating at approximately 150 tons per hour. The research is based on deterministic mass and energy balance modelling developed from actual operational data obtained from a nickel smelting facility. The analysis quantifies the relationship between carbon oxidation reactions and off-gas generation during the smelting process. Results reveal a strong linear correlation between increasing calcine carbon content and exhaust gas volume. At an average carbon content of 1.96 %, the furnace produces 47,241 Nm³/h of exhaust gas. Under these operating conditions, a cooling air injection of 9,292 Nm³/h is required to reduce the gas temperature from 1000 °C to 800 °C in order to maintain safe furnace operation. The findings demonstrate that precise control of calcine carbon content and optimised cooling air design are essential for improving operational safety and efficiency in nickel smelting. The developed model provides a quantitative basis for designing safer and more efficient industrial off-gas control systems.
Utilization of Sugarcane Bagasse Ash in Portland Composite Cement: Effects on Mortar Compressive Strength Alif Nur Laili Rachmah; Binti Ruliana; Sabrianah Badaruddin; Geraldi Rahanra; Ratri Sekaringgalih; Achmad Qodim Syafaatullah
Journal of Fundamentals and Applications of Chemical Engineering Vol 6, No 2 (2025): In Press
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v6i2.23097

Abstract

Sugarcane Bagasse Ash (SBA) is an agricultural biomass waste with a high content of reactive silica, making it a promising candidate as a pozzolanic additive in mortar based on Portland Composite Cement (PCC). This study investigates the influence of SBA incorporation on the compressive strength of mortar by substituting cement at levels of 5%, 10%, and 15% by weight. The SBA was prepared through calcination at 650 °C and further treated with 2N hydrochloric acid (HCl) to enhance its amorphous silica composition. Compressive strength tests were conducted at 3, 7, and 28 days of curing. Results indicate that the 5% SBA mixture provided the highest compressive strength, reaching 303–301 kg/cm² on day 28, and met the Indonesian National Standard (SNI 15-7064-2014) for structural applications. The Pozzolanic Activity Index (PAI) of 76% further confirmed SBA’s reactivity as a pozzolan under ASTM C618-99 criteria. Beyond mechanical performance, SBA utilization reduces clinker consumption and CO₂ emissions, promoting sustainability in cement production. Additionally, the formation of additional calcium silicate hydrate (C–S–H) gel improves the mortar’s microstructure. In conclusion, SBA is a feasible, locally available, and environmentally friendly alternative for enhancing the performance and sustainability of cement-based building materials.
Co-Authors Achmad Qodim Alzagladi, Safina Utari Ansori Ansori Ansori Ansori Ayu Qurota A’yun Badaruddin, Sabrianah Binti Ruliana Binti Ruliana Binti Ruliana Charis Gladi Iman Makoy Ervina Rumpakwakra Esther Muatiara Santallum Ekklesia Tibalia Esther Mutiara Santallum Ekklesia Tibalia Farida Diyah Hapsari Gede Wiratma Jaya Geraldi Rahanra Geraldi Rahanra Geraldi Rahanra Gessantara, M. Febbia Hana Nikma Ulya Indahma Puji Lestari Ivonne Telussa Muhammad Ikhsan Taipabu Muhammad Ikhsan Taipabu Muhammad Ikhsan Taipabu Nggolaon, Delpina Ratih C F Ratumanan Ratri Sekaringgalih Ratri Sekaringgalih Ratri Sekaringgalih Ronald Darlly Hukubun Sabrianah Badaruddin Sabrianah Badaruddin Sabrianah Badaruddin Sonya Hakim Raharjo Taipabu, Muhammad Ikhsan Tamaratritania Citta Trisnantari Tamaratritania Citta Trisnantari Tamaratritania Citta Trisnantari Tan, Clarissa Trisnantari, Tamaratritania Citta Yuni Susanti