Use of Plasma Cavitation Reactor in condensation of sanitary sewage treatment Plant at IKCO Company

In order to condensing the sanitary sludge, two types of complementary centrifugal and screw press devices are usually used. In this paper, in order to increase the efficiency and maximum dewatering in the final stage of the treatment plant, plasma cavitation reactor was used. The input sample of the studied system is the output sludge of the sanitary wastewater treatment plant process of IKCO after entering the digestion tank and staying for one hour. Using a plasma cavitation reactor by rectifier, a voltage of 50 volts and a current of 110 amps was applied to 5 iron electrodes in the cavitation reactor tank with a volume of 1 m3 and the sample was tested for 8 days and every day for 8 hours. Then, the effect of the presence of cavitation reactor on the percentage of dry matter is compared with the centrifuge and multi-disc screw press system when they used alone. Based on industrial and laboratory results, a decrease of more than 80% of wet sludge (conversion of 100 m3 of sludge to about 20 m3 daily) was observed daily. Also, the COD of the outlet water from the final cavitation tank was less than 200 mg/L, also, the amount of its turbidity reached below 50 NTU after passing through sand filters in the final stages which can be used for irrigation and agriculture. Using plasma cavitation reactor was effective in reducing settling time and the final volume of wet sludge.