Pengaruh Penambahan Garam Dapur (NaCl) dan Terhadap Perubahan Arus Listrik dan Kandungan Logam Pada Pengolahan Air Limbah Industri Secara Elektrokoagulasi

Sutanto (Politeknik Negeri Jakarta)
Nanang Rohadi (Politeknik Negeri Jakarta)

JURNAL POLI-TEKNOLOGI
Vol. 25 No. 1 (2026)

In this research, electronics industry waste water has been processed into drinking water. The study was conducted by flowing of 4.5 liters of waste water into the three cells of electrocoagulation process tank. Each cell is filled 1.5 liters of waste water without the addition of salt (NaCl). The electrocoagulation process is carried out at a voltage of 12 V and interval time for observation the change of current and the metals concentration is done every 10 minutes. Subsequently, the same procedure was performed and added the salt (NaCl) with variation of weight of 0.5, 1.0 and 1.5 g. Measuring of current was done by amperemeter  and  concentration of metals  by AAS. The best conditions are recommended for use of 0.5 gram of salt (NaCl), 12 volt of voltage and 100 minutes for processing time. Under these conditions the current can be increased from 0.23 A to 1.13 A or equivalent to 391.30 %  and then  concentration of Aluminum  (Al) can be reduced from 0.68 mg/ L to 0.01 mg/L  or equivalent to 98.53 % and the concentration of Sodium  can be reduced  from  18.23 mg/L  to 7.23 mg/L  or equivalent to 60.34 %.