Study on Treating Technology of Cr~(6+) wastewater by Direct current (dc) Electro-Coagulation Method

摘要

Cr~(6+) wastewater treatment by the self-designed the electric flocculation device has been investigated. This paper analyzed the factors such as the reaction time, reaction voltage, Electrode current, the electrolyte concentration, as well as Reaction pH on the effect of Cr~(6+) wastewater treatment. Comparison of previous studies: Under neutral condition, reaction current was 4.5 A, reaction voltage was 25 V, electrolytic time was 25 minutes. After processing Cr~(6+) down to concentration of 0.02 mg/l, which reached the national sewage discharge standards (GB8978-2002).