Greeners: Journal of Green Engineering for Sustainability

Optimalisasi Waktu Tunggu Antrian Bongkar Palm Kernel di Kernel Crushing Plant dengan Pendekatan Promodel

Helena Sihotang, Savanna Dahlia, Sendi A Narendra, Andry Setiawan — Tue, 30 Sep 2025 00:00:00 +0000

Optimization is an effort to improve process outcomes in an ideal and effective manner. One approach to solving queuing system problems is through simulation. The Kernel Crushing Plant faces queuing issues due to uneven workload distribution among the sampling tower, laboratory, and weighbridge. This condition requires improvements to the queuing system model to achieve a more efficient process flow.

Using Promodel software, the queuing system at the Kernel Crushing Plant can be virtually visualized by developing a new model. The proposed model includes separating palm kernel analysis from production analysis, implementing a robotic system for palm kernel sampling, and adding Foss NIRS equipment. The implementation of this model has been proven to reduce laboratory workload (percentage of operation) by nearly 23%, resulting in a more balanced productivity across all locations

Analisis Implementasi Reverse Logistics untuk Meningkatkan Efisiensi Biaya dalam Pengelolaan Limbah Medis di Klinik Kesehatan

Nia Arfina Foci, Rahmi M Nur, Syafira Salsabila, Muhamad Yasin, M Arif Munanda — Tue, 30 Sep 2025 00:00:00 +0000

Pengelolaan limbah medis merupakan tantangan utama dalam sistem kesehatan, terutama dalam memastikan efisiensi biaya sekaligus meminimalkan dampak lingkungan. Penelitian ini bertujuan untuk menganalisis hubungan antara penerapan reverse logistics dan efisiensi biaya pengelolaan limbah medis di klinik kesehatan. Metodologi yang digunakan adalah pendekatan kuantitatif dengan sampel sebanyak 36 responden yang terlibat dalam pengelolaan limbah medis. Data dikumpulkan menggunakan kuesioner, dan dianalisis menggunakan uji Chi-Square untuk mengevaluasi hubungan antar variabel. Hasil penelitian menunjukkan adanya hubungan yang signifikan antara penerapan reverse logistics dengan efisiensi biaya, di mana implementasi yang lebih baik dari reverse logistics mampu mengurangi pengeluaran operasional secara substansial. Kesimpulan dari penelitian ini mengindikasikan bahwa pengelolaan limbah medis melalui reverse logistics tidak hanya efektif dalam meningkatkan efisiensi biaya, tetapi juga mendukung keberlanjutan lingkungan. Implikasi praktis dari temuan ini dapat menjadi acuan bagi pengelola klinik kesehatan dalam merancang strategi pengelolaan limbah yang lebih efisien.

Optimalisasi Distribusi BBM di Bengkulu Menggunakan Analytical Network Process and Metode CF-RS

Tue, 30 Sep 2025 00:00:00 +0000

Kelangkaan BBM di Provinsi Bengkulu telah terjadi dalam beberapa hari terakhir. Bahkan, harga di tingkat eceran telah melonjak hingga Rp30.000 per liter. Penelitian ini bertujuan untuk memberikan solusi atas permasalahan distribusi BBM di Bengkulu yang telah dijelaskan sebelumnya dan memberikan solusi optimal menggunakan Metode Analytical Network Process dan Metode Cluster First Route Second (CFRS). sehingga penentuan rute terdekat adalah Truk Tangki 11 dengan rute Terminal BBM Lubuklinggau - SPBU 6 Kota Bengkulu - Terminal BBM Lubuklinggau dengan jarak 234 KM dan rute terjauh adalah Terminal BBM Lubuklinggau - SPBU 11 - SPBU 3 - Terminal BBM Lubuklinggau.

Analysis Quality for Kernel Production with Seven Tools Method

Sri Wahyu Nensi — Thu, 16 Oct 2025 00:00:00 +0000

In today’s era of rapid industrial advancement, the palm oil industry in Indonesia has experienced significant growth, intensified competition and prompting companies to enhance production quality to remain competitive. Predominantly acting as raw material suppliers, many palm oil companies, including those in Southeast Sulawesi, are required to meet stringent quality standards set by their domestic and international partners. One such company processes oil palm into crude palm oil (CPO), palm kernel, fibre, and kernel shell, with CPO and kernel being distributed to partner companies under strict quality agreements. A breach of these agreements, particularly in kernel quality, has led to penalties and potential termination of partnerships. Palm kernel oil (PKO), a high-value derivative, must meet quality criteria such as free fatty acid content, moisture, dirt content, and kernel integrity. Observations revealed recurring deviations from these standards, notably in excessive dirt content. This study aims to identify root causes of quality issues using the Seven Quality Control Tools method, supported by primary data including production outputs and interviews with workers. The analysis identified key contributing factors: inadequate adherence to machine efficiency guidelines by operators, sorting errors in raw materials, and mismatched or poorly maintained machinery. Corrective actions were proposed using 5W+1H analysis, emphasizing the need for operator compliance with efficiency protocols, improved raw material handling, and appropriate machine usage and maintenance to ensure consistent kernel quality aligned with agreed standards.

Analisis Pengendalian Persediaan Bahan Baku Berdasarkan Metode Economic Order Quantity Pada Toko Classic Donat Kendari

Nurma Wal'afny, Arifuddin Mas’ud, Wahyuni Rahmah — Sat, 25 Oct 2025 00:00:00 +0000

The company's main objective is to achieve profitability through an optimal production process, which is highly dependent on the availability and efficient management of raw materials. Although vital, raw material supplies must be managed optimally—not excessively—for cost efficiency, which requires careful calculation of the ideal purchase quantity and timing. Toko Classic Donat Kendari still implements an inefficient purchasing policy, which is based on estimates (purchasing small quantities when supplies are running low) to prevent spoilage. This study aims to evaluate the control of raw material inventory at Toko Classic Donat Kendari using the Economic Order Quantity (EOQ) method. This study uses a combined qualitative and quantitative approach, with data collection through interviews and documentation. The results of the study indicate that Toko Classic Donat Kendari can control raw material inventory more effectively through the application of the EOQ method. The implementation of EOQ has been proven to optimize ordering costs and storage costs, which overall contribute to a reduction in total inventory costs.