The paper reports the principe, process chart, experimental procedures and results on larger seales for the technique of extraction of citric acid by ED. ED can replace the present processes……precipitation of calcium citrate and then acidolysis of calcium citrate with sulphuric acid. After ED, the average recovery of citric acid is 92. 71%. The power cost is O.75kwh per Kg of citric acid. The products of citric acid after ED comply with the standard of BP(80).