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Contact Name
Isra Mouludi
Contact Email
reactor@poltekatipdg.ac.id
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+6281363424853
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reactor@poltekatipdg.ac.id
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Politeknik ATI Padang Jl Bungo Pasang Tabing Padang, 25171 Indonesia
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Kota padang,
Sumatera barat
INDONESIA
REACTOR : Journal of Research On Chemistry And Engineering
Published by Politeknik ATI Padang
ISSN : -     EISSN : 27460401     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Energy
1. Bioenergy 2. Waste Treatment 3. Simulation and control process 4. Advanced materials 5. Bioengineering (chemical & massa) 6. Bioprocess 7. General chemistry 8. Applied chemistry 9. Biochemical 10. and other as problem solving in the field of environment, energy, food, agriculture, medical and pharmacy
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 132 Documents
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STUDI PENGARUH WAKTU TRANSESTERIFIKASI PADA SINTESIS BIODIESEL DARI BIJI KARET DENGAN MENGGUNAKAN KATALIS CaO/ZnO/y-Al2O3 Ida Hasmita; Chartika Putri; Zulhaini Sartika; Khairul Akli
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.81

Abstract

Rubber seeds (Hevea brasiliensis) from Aceh plantations, Indonesia, offer a promising non-edible feedstock for biodiesel synthesis via transesterification due to their high oil content addressing fossil fuel depletion and environmental challenges. This study examines the effect of transesterification time on biodiesel yield and quality using a novel CaO-ZnO/γ-Al₂O₃ heterogeneous catalyst. Rubber seed oil was extracted via Soxhlet method with n-hexane, degummed with phosphoric acid, and transesterified with methanol (1:15 molar ratio, 3 wt% catalyst) at 70°C for 60, 70, and 80 minutes. Oil characterization revealed low moisture (0.012%) and free fatty acids (7.96%). Maximum yield reached 95% at 70 minutes, attributed to optimal triglyceride-methanol interactions before saturation. Density values (903.5-941.5 kg/m³) exceeded SNI 7182:2015 limits (≤860 kg/m³) due to incomplete glycerol separation, while kinematic viscosity met standards (2.67-2.88 mm²/s). GC-MS of the optimal sample identified key fatty acid methyl esters: octadeca-9,12-dienoic acid (33.13%), oleic acid (3.37%), linoleic acid (2.40%), and hexadecenoic acid (1.04%). These results confirm rubber seed biodiesel viability with process optimization needed for density compliance, promoting waste valorization in rubber-producing regions.
Evaluasi Kinerja Penyisihan Kekeruhan dan Penggunaan PAC dalam Operasional Harian di SPAM Katulampa, Kota Bogor Niesa Hanum Mistoro; Enry Adiarto Guntoro; Noviani Ima Wantoputri; Dahlia Anggita Zahra; Makmur Gunawan; Muhammad Yacob
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.90

Abstract

This study evaluates turbidity removal performance and daily Polyaluminum Chloride (PAC) use at SPAM Katulampa, Bogor, based on routine operational data under fluctuating raw water turbidity. Daily operational data from 10 February to 10 March 2026 were analysed, including raw water turbidity, treated water turbidity, PAC consumption, and flow rate. Descriptive statistics, time-series plots, turbidity removal calculation, and exploratory scatter plots with linear trendlines were used to assess treatment stability and the relationship between PAC use and turbidity. Raw water turbidity varied widely from 12.00 to 262.97 NTU, while treated water turbidity remained low at 0.52–0.91 NTU, below the 3 NTU national turbidity limit. Turbidity removal ranged from 94.9% to 99.8%, indicating stable performance of the treatment process. Daily PAC use ranged from 324.75 to 519.60 kg/day. However, the linear relationships between raw water turbidity and PAC use (R² = 0.0148), and between PAC use and treated water turbidity (R² = 0.0021), were very weak. The results indicate that low treated-water turbidity was maintained despite high raw-water variability, but this stability cannot be attributed solely to PAC use. It is more appropriately understood as the combined performance of coagulation, flocculation, sedimentation, filtration, and routine operational control. Higher-resolution operational data are needed to evaluate real-time PAC dose response and process optimization.

Page 14 of 14 | Total Record : 132

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