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Sitorus, Oby Vijay
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Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Sintesis Biosorben dari Cangkang Kelapa Sawit Melalui Modifikasi Permukaan Kimia dengan Naoh untuk Adsorpsi Air Water Treatment Plant Unit Sand Filter Fithry, Dwi Annisa; Sitorus, Oby Vijay; Asri, Muhammad Alif
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.55294

Abstract

Indonesia, as the world's largest palm oil producer, generates approximately 26 million tons of palm shell waste annually. This study aimed to evaluate the effect of contact time of NaOH-activated palm shell biosorbent on reducing water quality parameters in the WTP (Water Treatment Plant) sand filter unit at PKS PTPN IV Regional 3. Palm shells were prepared through washing, drying at 105°C, grinding, and sieving at 100 mesh. Chemical activation using 1 M NaOH for 2 hours without carbonization process resulted in increased material porosity. Adsorption testing was conducted at contact times of 30, 60, 90, and 120 minutes with adsorbent dosage of 10 grams per 100 mL water sample. Results showed that adsorption efficiency for Fe parameter reached 88-95% at 90 minutes contact time, turbidity reached 85-93% at 60 minutes, pH increased from 5.5 to 6.5-7.0, and TDS decreased from 27 to 25 mg/L. Kinetic analysis indicated that adsorption followed the pseudo-second-order model with determination coefficient R² = 0.998 for Fe and R² = 0.999 for turbidity, indicating chemisorption mechanism. Palm shell biosorbent without carbonization proved effective as an environmentally friendly alternative for water purification in palm oil industry WTP systems.
Pengaruh Variasi Ukuran Mesh dan Kecepatan Pengadukan Terhadap Kinerja Serat Fiber Kelapa Sawit Tanpa Aktivasi dalam Penurunan COD dan Perubahan pH Effluent POME dengan Tawas dan PAC Fithry, Dwi Anissa; Sitorus, Oby Vijay; Syafitri, Fadila
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.55302

Abstract

Palm Oil Mill Effluent (POME) has very high COD (26,420 mg/L) and acidic pH (5.25), requiring a simple, economical, and sustainable polishing stage to approach environmental quality standards. This study investigates the effect of mesh size variation and stirring speed on the performance of unactivated oil palm fiber as a polishing medium for POME effluent with alum and PAC addition to reduce COD and modify pH. Laboratory-scale batch experiments used POME effluent from PKS Sei Pagar (COD 26,420 mg/L, pH 5.25), pyrolyzed oil palm fiber (yield 63.12%, moisture 4.88%) with mesh sizes 60 and 70, stirring at 50-100 rpm for 30 minutes, and alum/PAC solution (5 g/250 ml) at 4 ml/100 ml POME. The mesh 60 + alum 100 rpm combination achieved the highest COD reduction of 54.4% and relatively stable final pH.
Perbandingan Karbon Aktif Tandan Kosong Kelapa Sawit Tidak Teraktivasi dan Teraktivasi H2SO4 0,1m Terhadap Penururnan Cod dan Ph Air Rebusan Kelapa Sawit Melalui Proses Adsorpsi Bacth Fithry, Dwi Anissa; Sitorus, Oby Vijay; Amanda, Mesy Isni
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.55303

Abstract

The palm oil industry produces liquid waste in the form of palm oil boiled water which has a high organic compound content, causing high Chemical Oxygen Demand (COD) values ​​and unstable pH. This study aims to compare the performance of activated and unactivated OPEFB activated carbon with 0.1 M H2SO4 in reducing COD values ​​and stabilizing the pH of palm oil boiled water through a batch adsorption process. The adsorption process is carried out in batches with variations in adsorbent mass, stirring speed, and certain contact time. Activated activated carbon is prepared using 0.1 M H2SO4 solution, while non-activated activated carbon is used without chemical treatment. The parameters analyzed include COD and pH values ​​before and after the adsorption process. The results of the study showed that 0.1 M H2SO4-activated EFB activated carbon had better adsorption capacity than non-activated activated carbon in reducing COD from palm oil boiled water and producing a pH closer to neutral.
Co-Authors Amanda, Mesy Isni Asri, Muhammad Alif Fithry, Dwi Anissa Fithry, Dwi Annisa Syafitri, Fadila