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All Journal Equilibrium Journal of Chemical Engineering Pakem : Jurnal Pengabdian Kepada Masyarakat CHEMTAG Journal of Chemical Engineering
Muhammad Ikhsan Taipabu
Universitas Pattimura
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Public Health Social Sciences Other

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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.
Gamma Spectrometric Analysis of Natural Radionuclides and Radiological Hazards in Ilmenite Sand Esther Mutiara Santallum Ekklesia Tibalia; Farida Diyah Hapsari; Tamaratritania Citta Trisnantari; Geraldi Rahanra; Muhammad Ikhsan Taipabu
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.v10i1.116251

Abstract

Ilmenite sand, categorized as Naturally Occurring Radioactive Material (NORM), contains radionuclides derived from the uranium and thorium decay series. The present work investigates radionuclide concentrations in ilmenite sand collected from a mineral processing facility to evaluate associated radiological hazards using gamma spectrometry. Activity measurements were performed with a gamma spectrometry system calibrated for energy and efficiency using a Eu-152 reference source. Environmental background radiation was measured separately to correct spectral data during analysis. Prior to measurement, samples were dried, homogenized, and sealed in airtight containers to establish radioactive equilibrium between parent radionuclides and their progeny. Radionuclide activities were quantified based on characteristic gamma-ray peak energies. The measured activity concentrations were 472.98 Bq/kg for Ra-226, 302.20 Bq/kg for Th-232, and 10.68 Bq/kg for K-40. Radiological hazard parameters, including radium equivalent activity (Raeq), external hazard index (Hex), internal hazard index (Hin), and absorbed dose rate, were subsequently calculated. The estimated annual effective dose was 0.492 mSv/year, remaining below the recommended public exposure limit of 1 mSv/year. These findings indicate that, despite relatively elevated radionuclide activities, the resulting radiation exposure levels remain within acceptable safety limits. Overall, gamma spectrometry demonstrates reliable capability for radionuclide identification and radiological risk assessment in mineral-based materials.
EDUKASI PEMBUATAN SABUN CAIR AROMA TERAPI MELALUI MEDIA POSTER KEPADA GURU DAN TENAGA KEPENDIDIKAN DI SD NEGERI 292 MALUKU TENGAH Gede Wiratma Jaya; Nikmans Hattu; Delpina Nggolaon; Ervina Rumpakwakra; Alif Nur Laili Rachmah; Geraldi Rahanra; Muhammad Ikhsan Taipabu; Tamaratritania Citta Trisnantari; Sabrianah Badaruddin
PAKEM: Jurnal Pengabdian Kepada Masyarakat Vol 6 No 3 (2026): Pakem : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/pakem.6.3.557-564

Abstract

Soap has become an essential commodity in society, primarily due to its dual functionality as a cleansing agent for removing cutaneous impurities and as a degreasing medium for food utensils. With the increasing demand for soap, training on small-scale soap production becomes essential. One effective pedagogical approach for such training involves the utilization of educational posters as a primary medium. This community service initiative aims to disseminate comprehensive knowledge regarding chemical constituents and standardized methodologies for liquid soap formulation through poster-based communication. This community service initiative was conducted at SD Negeri 292 Maluku Tengah, involving teachers and educational staff as the primary participants. The program implemented a Service-Learning (SL) methodology, which followed a structured framework consisting of three distinct phases: planning, implementation, and evaluation. The results of this community service initiative demonstrated a high level of engagement among participants toward the poster-based education on liquid soap formulation. Participants acquired comprehensive insights regarding raw material selection, production methodologies, and budget estimation analysis. The project team demonstrated the pre-formulated liquid soap products to the participants, followed by an immediate practical trial session. Based on the cost analysis, the estimated expenditure for producing 50 units of liquid soap was approximately IDR 883,000.00. This calculation offers participants valuable insights into establishing a liquid soap production business. Furthermore, this educational content can be integrated into the entrepreneurship curriculum for students at SD Negeri 292 Maluku Tengah. It can be concluded that this community service program successfully provided education and information on the raw materials, manufacturing processes, and cost estimation of liquid soap via poster media. Through this initiative, SD Negeri 292 Maluku Tengah is expected to adopt poster media as an educational medium for liquid soap production
Co-Authors Alif Nur Laili Rachmah Badaruddin, Sabrianah Delpina Nggolaon Ervina Rumpakwakra Esther Mutiara Santallum Ekklesia Tibalia Farida Diyah Hapsari Gede Wiratma Jaya Geraldi Rahanra Ivonne Telussa Nikmans Hattu Sabrianah Badaruddin Tamaratritania Citta Trisnantari Trisnantari, Tamaratritania Citta