Application of Cold Plasma Technology in Sludge Treatment

Cold plasma technology was used to treat sludge,and the effects of various discharge times on the p H,EC,content of available nutrients( available nitrogen,available phosphorus and available potassium),value of fecal coliforms,and mortality of Ascaris lumbricoides eggs of sludge were studied. The results showed that after the treatment of sludge by cold plasma technology,it had certain effects on the p H,EC,available nitrogen and available phosphorus content of the sludge,and had no significant effect on available potassium content. Within certain discharge times,sludge p H increased,while EC,available nitrogen and available phosphorus content decreased,and there was no significant change in available potassium content. The plasma generated by discharge could effectively kill microorganisms under normal atmospheric pressure,so that the value of fecal coliforms and mortality of Ascaris lumbricoides eggs of the treated sludge could meet the requirements of the relevant standard.