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Siti Utari Rahayu
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Journal of Technomaterial Physics
Published by TALENTA PUBLISHER
ISSN : 26560747     EISSN : 26560755     DOI : https://doi.org/10.32734/jotp
Core Subject : Science, Engineering,
Astronomy Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Journal of Technomaterial Physics (JoTP) is a peer-review national journal that is published twice a year, in February and August. JoTP provides an open access policy for the writer and free publication charge. Due to its open access policy, JoTP serves online publication and a fast review process. The scope of this journal are: 1. Theoretical Physics 2. Applied Physics 3. Material Physics 4. Computational Physics and Machine Learning 5. Experimental Physics 6. Nuclear Physics and Particle Physics 7. Biophysics and Medical Physics 8. Geophysics 9. Energy and Energy Conversion 10. Advanced Materials (photonics, nanomaterial and nanotechnology) 11. Electronics and Electrical Engineering 12. Metrology JoTP receives an original article with the maximal length of 10 pages and provides an open access policy for the writers and free publication charge.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 132 Documents
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Reduction of COD and BOD Levels in Tofu Liquid Waste Processing Using the Electrocoagulation Method Suci, Suci Amanda; Masthura, Masthura; Jumiati, Ety
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22378

Abstract

Tofu liquid waste treatment is very important because of its high organic content and can cause environmental pollution. This research uses electrocoagulation method with cylindrical aluminum electrodes to lower Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) levels. The variation of the treatment time used is 45, 60, and 75 minutes with a voltage of 12 volts and a distance between the electrodes of 2 cm. The test results showed that the BOD concentration decreased from 816 mg/L to 57–104 mg/L (efficiency 87–93%), while COD decreased from 2696 mg/L to 78–118 mg/L (efficiency 95–97%). In addition, the pH increased from 3.44 to 6.03–6.99 so that it is close to neutral condition. All final results meet the quality standards of liquid waste according to the Regulation of the Minister of Environment and Forestry No. 5 Year 2014, as well as aluminum content according to drinking water quality standards according to Permenkes No. 492/MENKES/PER/IV/2010. Thus, electrocoagulation using cylindrical electrodes is proven to be effective, environmentally friendly, and potentially applied to small to medium-scale tofu waste treatment.
The effect of Electrode Type Differences on BOD and COD Reduction in Tofu Wastewater Treatment khofifahparawansyah, khofifah; Masturah, Masturah; Jumiati, Ety
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22431

Abstract

Research has been conducted aimed at testing the results of tofu liquid waste samples on the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) parameters before and after the electrocoagulation process using Al, Cu, and Zn electrodes. This study used tofu liquid waste from Jl. Pasar V Helvetia. The BOD test results before electrocoagulation were 816 mg/L. The BOD test results after electrocoagulation with Al electrodes were 112 mg/L, Cu electrodes were 55 mg/L, and Zn electrodes were 115.2 mg/L. The COD level test results before electrocoagulation were 2696 mg/L. The COD level test results after electrocoagulation with Al electrodes were 95 mg/L, Cu electrodes were 62 mg/L, and Zn electrodes were 105 mg/L. From the electrode variations, the best results were obtained for testing the BOD and COD levels of tofu liquid waste on the Cu electrode.

Page 14 of 14 | Total Record : 132

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