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All Journal REKAYASA Jurnal Engineering
Heraningsih, Sarah Fiebrina
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Agriculture, Biological Sciences & Forestry Computer Science & IT Electrical & Electronics Engineering Engineering Physics

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Indikator Pengelolaan Sampah Di Perguruan Tinggi Menggunakan Tolak Ukur Pertanyaan-Penilaian Viareco, Hariestya; Heraningsih, Sarah Fiebrina; Ilfan, Freddy; Putra, Tri Syukria
Jurnal Engineering Vol. 5 No. 2 (2023): Volume 5, Nomor 2, 2023
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jurnalengineering.v5i2.23687

Abstract

Sebagai institusi pendidikan, kampus memiliki tanggung jawab untuk menyediakan lingkungan yang bersih, sehat, dan asri serta menjadi agen perubahan dalam masyarakat sekitarnya. Penelitian ini bertujuan untuk mengembangkan sebuah kerangka sistem pengukuran pengelolaan sampah di perguruan tinggi dengan memanfaatkan teknologi. Penelitian ini menggunakan metode  pengumpulan data dengan menggunakan kuesioner UEQ berbasis skala Likert yang merujuk pada UI Green Metric sebagai acuan. Hasil analisis data memberikan gambaran tingkat pengelolaan sampah di Kampus Pondok Meja berada dalam area kuadran III, dengan persentase interval berada di rentang 30%-60%, yang termasuk dalam kategori sedikit dan sedang. Dari hasil ini, dapat terlihat bahwa terdapat banyak aspek pengelolaan yang perlu ditingkatkan, terutama dari segi fasilitas dan program yang mendukung visi kampus hijau. Melalui penelitian ini, pengelola kampus dapat mengambil tindakan yang tepat untuk meningkatkan efektivitas dan efisiensi pengelolaan sampah, serta menciptakan kebijakan dan strategi yang lebih berkelanjutan di masa depan.
Sustainable River Water Treatment Using Coffee Grounds: A Case Study on the Batanghari River Raudhatussya'rifah, Ra'ida; Heraningsih, Sarah Fiebrina; Alfernando, Oki; Widyastuti, Nita; Amelia, Dera; Meiyola, Nada Karima; Amanda, Nathasya Putri; Sakinah, Syarri; Ancel, Violetta Fanissa
Rekayasa Vol 18, No 3: Desember, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i3.31002

Abstract

The Batanghari River is increasingly contaminated by organic and inorganic pollutants resulting from intensive human activities, posing significant risks to both ecosystems and public health. This study evaluates the potential of spent coffee grounds—a low-cost, eco-friendly organic waste—as a biosorbent to purify the river water, specifically focusing on the removal of soluble contaminants measured by Total Dissolved Solids (TDS). The coffee grounds were prepared via thermal activation (110 °C for 30 min) and systematically tested in a batch adsorption system using dosages of 1, 2, and 3 grams to determine the optimal dosage for water quality improvement. The treatment demonstrated high efficacy across multiple water quality parameters. The adsorbent achieved an outstanding turbidity removal efficiency of 91.96%, effectively eliminating suspended particles. The optimal reduction in TDS was recorded at 4.9 mg/L using the 3-gram dosage, confirming success against soluble contaminants. Concurrently, the pH level increased from 6.65 to 8.16 at the 2-gram dose, reflecting improved water neutrality, and physical observations confirmed the murky, foul-smelling water became visibly clearer and odorless. Isotherm analysis revealed that the adsorption process is governed by the Langmuir model, confirming a favorable monolayer adsorption mechanism. This is evidenced by a maximum adsorption capacity (Qmax) of 10.50 mg/g and a separation factor (RL) of 0.21. These results robustly establish spent coffee grounds as a highly accessible and sustainable solution for environmental remediation, offering a viable pathway for restoring river water quality while utilizing agricultural waste. 
Co-Authors Alfernando, Oki Amanda, Nathasya Putri Amelia, Dera Ancel, Violetta Fanissa Hariestya Viareco Ilfan, Freddy Meiyola, Nada Karima Putra, Tri Syukria Raudhatussya'rifah, Ra'ida Sakinah, Syarri Widyastuti, Nita