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Processing of Tofu industrial wastewater by electrocoagulation method using aluminum (Al) electrode at various electrical current and contact time

Indonesian Journal of Chemical Science · Vol. 14 No. 1 (2025) · hlm. 85–97

DOI
10.15294/ijcs.v14i1.18787
ISSN
2502-6844, 2252-6951
Terbit
2025-05-05
Penerbit
Prodi Kimia
Bahasa
eng

Abstrak

This research aims to determine the effect of varying voltage and contact time on reducing levels on Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS) and ammonia as well as increasing pH values ​​in tofu industrial wastewater by electrocoagulation using Aluminum electrodes. There were 4 variations of voltage (10,20,30,4 0A) and 5 variations of contact time (30,60,90,120,150 minutes). Analysis of COD levels and ammonia levels was carried out using a UV-Vis spectrophotometer, analysis of TSS levels gravimetrically using Whatman filter paper No. 42, analysis of TDS levels with gravimetrically, and analysis of pH values ​​by a pH meter. The best results were obtained from treatment at voltage of 40 A and a contact time of 150 minutes with the highest efficiency of reducing COD, TSS, TDS, ammonia levels respectively at 90.35; 92; 66; 85% and the highest increase in pH value was 108%. The results of the diversity analysis or Tukey's advanced test showed that at the 5% level each treatment had a significant effect on reducing COD, TSS, TDS and ammonia levels as well as increasing the pH value. Chemical kinetics analysis of the reduction in COD and TSS levels showed results that were close to first orde linear and obtained R2 and k values ​​respectively of (0.9904; 0.0164); (0.9952; 0.0182) at voltage variation of 40 A

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  • Sriwijaya University
  • Universitas Halu Oleo
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Rekan penulisOrganisasiArtikel bersama
Poedji Loekitowati HarianiSriwijaya University3
Hasanudin HasanudinSriwijaya University2
Fahma RiyantiSriwijaya University2
Widia PurwaningrumSriwijaya University2
Muh. Alim MarhadiUniversitas Halu Oleo1
La RudiUniversitas Halu Oleo1
Ramadhan TosepuUniversitas Halu Oleo1
Fifi Nirmala GUniversitas Halu Oleo1
Muhammad SaidSriwijaya University1
Salni SalniSriwijaya University1
Nabila ApriantiSriwijaya University1
Anisa Fitri AmatullahSriwijaya University1
Aldes LesbaniSriwijaya University1
Risfidian MohadiSriwijaya University1
Neza Rahayu PalapaSriwijaya University1
Tarmizi TaherSriwijaya University1
Bakri Rio RahayuSriwijaya University1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journal.unnes.ac.id/journals/ijcs/oai, pertama di-harvest 5 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en">Processing of Tofu industrial wastewater by electrocoagulation method using aluminum (Al) electrode at various electrical current and contact time</dc:title>
	<dc:creator xml:lang="en">Rachmat, Addy</dc:creator>
	<dc:creator xml:lang="en">Fatma, Fatma</dc:creator>
	<dc:creator xml:lang="en">Pratama, Nisa Manora</dc:creator>
	<dc:creator xml:lang="en">Musifa, Eva</dc:creator>
	<dc:description xml:lang="en">This research aims to determine the effect of varying voltage and contact time on reducing levels on Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS) and ammonia as well as increasing pH values ​​in tofu industrial wastewater by electrocoagulation using Aluminum electrodes. There were 4 variations of voltage (10,20,30,4 0A) and 5 variations of contact time (30,60,90,120,150 minutes). Analysis of COD levels and ammonia levels was carried out using a UV-Vis spectrophotometer, analysis of TSS levels gravimetrically using Whatman filter paper No. 42, analysis of TDS levels with gravimetrically, and analysis of pH values ​​by a pH meter. The best results were obtained from treatment at voltage of 40 A and a contact time of 150 minutes with the highest efficiency of reducing COD, TSS, TDS, ammonia levels respectively at 90.35; 92; 66; 85% and the highest increase in pH value was 108%. The results of the diversity analysis or Tukey's advanced test showed that at the 5% level each treatment had a significant effect on reducing COD, TSS, TDS and ammonia levels as well as increasing the pH value. Chemical kinetics analysis of the reduction in COD and TSS levels showed results that were close to first orde linear and obtained R2 and k values ​​respectively of (0.9904; 0.0164); (0.9952; 0.0182) at voltage variation of 40 A</dc:description>
	<dc:publisher xml:lang="en">Prodi Kimia</dc:publisher>
	<dc:date>2025-05-05</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en">Peer-reviewed Article</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.unnes.ac.id/journals/ijcs/article/view/18787</dc:identifier>
	<dc:identifier>10.15294/ijcs.v14i1.18787</dc:identifier>
	<dc:source xml:lang="en">Indonesian Journal of Chemical Science; Vol. 14 No. 1 (2025): Indonesian Journal of Chemical Science; 85-97</dc:source>
	<dc:source>2502-6844</dc:source>
	<dc:source>2252-6951</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.unnes.ac.id/journals/ijcs/article/view/18787/3751</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2025 Indonesian Journal of Chemical Science</dc:rights>
</oai_dc:dc>