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All Journal JURNAL NASIONAL TEKNIK ELEKTRO REACTOR : Journal of Research On Chemistry And Engineering Andalas Journal of Electrical and Electronic Engineering Technology Jurnal Rekayasa elektrika
Reni Desmiarti
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering

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Aplikasi Plasma Dengan Metoda Dielectric Barrier Discharge (DBD) Untuk Pengolahan Limbah Cair Kelapa Sawit Yulastri .; Ariadi Hazmi; Reni Desmiarti
JURNAL NASIONAL TEKNIK ELEKTRO Vol 2 No 2: September 2013
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.608 KB) | DOI: 10.25077/jnte.v2n2.85.2013

Abstract

The processing of palm oil into crude palm oil (CPO) produced palm oil mill effluent (POME) as many as 2500 l/ton of CPO. POME contains Chemical Oxygen Demand (COD) average of 21,280 mg/l, Biochemical Oxygen Demand (BOD) average of 34,720 mg/l, fatty oils average of 3,075 mg/l and the average pH of 4. Wastewater treatment systems in the palm oil industry is the combination of physical processes such as sedimentation and biological processes, either anaerobic or aerobic. The weaknesses of conventional processing systems is a long processing time (10-90 days) and require extensive land area (± 6 times the total area of the factory). This study aims to provide an alternative method for POME treatment with plasma system through  Dielectric Barrier Discharge (DBD). The results showed removal efficiency for COD, BOD and fatty are 53%, 55 % and 40 % with the processing time of 4 hours, respectively. Beside, consumed energy was 7.2 kWh/l for voltage application of 19 kV.Keywords: oil palm wastewater, DBD plasma, compounds organics, energy consumptionAbstrakProses pengolahan kelapa sawit menjadi minyak sawit mentah atau Crude Palm Oil (CPO) menghasilkan limbah cair sawit sebanyak 2500 l/ton CPO. Limbah cair kelapa sawit ini mengandung Chemical Oxygen Demand (COD) rata-rata sebesar 21.280 mg/l, Biochemical Oxygen Demand (BOD) rata-rata sebesar 34.720 mg/l, minyak lemak rata-rata sebesar 3.075 mg/l dan pH rata-rata sebesar 4. Sistem pengolahan limbah cair kelapa sawit di industri adalah dengan kombinasi proses fisik seperti sedimentasi dan proses biologi, baik secara anaerob atau aerob. Kelemahan dari sistem pengolahan konvensional adalah waktu pengolahan yang lama (10-90 hari) dan membutuhkan lahan yang sangat luas (± 6 kali dari luas areal pabrik). Penelitian ini bertujuan untuk memberikan alternatif pengolahan limbah cair kelapa sawit dengan sistem plasma melalui metoda Dielectric Barrier Discharge (DBD). Hasil penelitian menunjukan efisiensi penghilangan COD sebesar 53%, BOD sebesar 55% dan minyak lemak 40% dengan waktu pengolahan 4 (empat) jam. Konsumsi energi yang dibutuhkan 7,2 kWh/l untuk tegangan pembangkitan 19 kV.     Keywords: oil palm wastewater, DBD plasma, compounds organics, energy consumption  
Penghilangan Mikroorganisme dalam Air Minum dengan Dielectric Barrier Discharge Ariadi Hazmi; Reni Desmiarti; Eka Putra Waldi; Arief Hadiwibowo; . Darwison
Jurnal Rekayasa Elektrika Vol 10, No 1 (2012)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.425 KB) | DOI: 10.17529/jre.v10i1.143

Abstract

Microorganisms such as Escherichia coli in water are a component that is difficult to remove in conventional water treatment systems. Several systems have been implemented to reduce levels of microorganisms is the use of disinfectants, the membrane filtration and activated carbon absorption. These systems have several weaknesses, so that not all microorganisms can be removed from drinking water. The plasma system is an applicable technology for removing organic compounds and microorganisms in drinking water. By creating plasma in water will produce several of active species such as OH-, H+, O3 and H2O2 that has a high oxidation potential, decompose organic compounds and kill microorganisms in the water significantly. This paper will describe the removal of microorganisms in drinking water using a plasma system by the method of dielectric barrier discharge (DBD ). The results howed that the pH of drinking water produced in the range 6.5 to 7.3. The higher voltage causes the higher the conductivity, temperature and ORP water. Removal efficiency for the content of microorganisms Coli Fecal and Coliform in the range 99.2 to 100% after water was injected voltage of 13-17 kV for 10 minutes.
Electrocoagulation in Wastewater Treatment: A Comprehensive Review on Parameters and Applications Nofri Naldi; Hazmi, Ariadi; Reni Desmiarti; Primas Emeraldi
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 5 No. 2 (2025): November 2025
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/ajeeet.v5i2.163

Abstract

Electrocoagulation (EC) is a widely recognized and effective electrochemical treatment method used for removing various contaminants in liquid wastewater. It is capable of reducing a broad spectrum of pollutants, including heavy metals such as lead and cadmium, fluoride ions, dye molecules, oils, and pharmaceutical residues. The efficiency of EC depends on multiple parameters, including current density (which influences the rate of coagulation), pH level (affecting electrochemical reactions), electrode material (such as aluminum or iron), and the conductivity of the solution (which impacts energy consumption). Compared to conventional chemical coagulation processes, EC offers notable advantages by more effectively destabilizing fine colloidal particles, leading to faster aggregation and sedimentation, while consuming less energy. This review highlights recent technological advancements in EC applications, pointing out that most studies have been conducted at the batch scale, with relatively limited progress in developing continuous operation systems. The main challenges hindering large-scale implementation include electrode passivation (which reduces efficiency over time), sludge management issues, and the need for energy consumption optimization. To address these challenges, various strategies such as improving reactor design, developing hybrid treatment systems, and integrating EC with other processes are being explored. Overall, EC exhibits significant potential as a sustainable, flexible, and cost-effective technology for wastewater treatment. However, ongoing research is crucial to enhance the operational stability of continuous systems and ensure long-term sustainability, thereby facilitating broader industrial adoption of this promising technology.
Optimasi Penghilangan COD dan Warna dengan Proses Koagulasi, Flokulasi dan Sedimentasi untuk Pengolahan Air Limbah Industri Kertas Ulung Muhammad Sutopo; Elfia Fariza; Lastri Sartika; Reni Desmiarti
REACTOR: Journal of Research on Chemistry and Engineering Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i2.9

Abstract

Pulp and paper industry wastewater contains very potential pollutants, especially suspended solids, BOD, and COD which are stable colloids and difficult to separate. To reduce the COD content in paper industry wastewater, the addition of coagulant chemicals is needed. The coagulant used is 20% poly aluminum chloride (PAC) with a variation of 100-600 mg/L and polymer with a dose of 1-6 mg/L to reduce COD and color in wastewater treatment. The settling time used is 1-25 minutes. The effect of adding PAC coagulant is able to reduce COD and color of wastewater at the optimal point, but when the addition of PAC is excessive, the COD and color of the wastewater increase again. The results found that the optimum conditions occurred at a PAC dosage of 400 mg/L and a polymer dosage of 4 mg/L with a settling time of 20 minutes, resulting in a reduction of TSS, COD, and color to 12 mg/L, 102 mg/L, and 123 PtCo, respectively. The combination of coagulation-flocculation-sedimentation processes under these optimum conditions proved effective as a tertiary treatment to meet wastewater quality standards for the paper industry
Co-Authors . Darwison Ariadi Hazmi Arief Hadiwibowo Eka Putra Waldi Elfia Fariza Lastri Sartika Nofri Naldi Primas Emeraldi Ulung Muhammad Sutopo Yulastri .