Improvement of water quality using dielectric barrier discharge plasma

International Nuclear Science and Technology Conference 2016

Quyen, N.T.^1 ; Traikool, T.^2 ; Nitisoravut, R.^3 ; Onjun, T.^1

School of Common and Graduate Students, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani

12120, Thailand^1

School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani

12120, Thailand^2

School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani

12120, Thailand^3

关键词: Atmospheric plasmas;    Dielectric barrier discharge plasmas;    Dielectric barrier discharges;    Domestic wastewater;    Plasma treatment;    Suspended solids;    Total suspended solids;    Water and wastewater;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/860/1/012031/pdf
DOI  :  10.1088/1742-6596/860/1/012031

来源: IOP

【 摘 要 】

The improvement of water quality using by atmospheric plasma produced from a dielectric barrier discharge (DBD) was studied. An experiment was set-up with a 4 mm diameter pipe, which contains 2 electrodes and has an air flow with the rate of 15 liters per minute. Surface water, domestic wastewater and DI water were treated with the DBD plasma for some period of time. Electricity was supplied at 3.5 kV with the frequency of 5.5 kHz. Some key parameters of water quality includes the level of chemical oxygen demand (COD), total suspended solid (TSS), color, and odor are measured before and after. The result showed that strong acid with pH below 2 was observed after 60 minutes plasma treatment for the DI water, while the surface water and wastewater needs about 120 minutes to pH below 2 even though the pH value are about the same at the beginning. Moreover, It was formed that the COD, TSS microorganism was noticeably decreased, therefore the increasing of transparency level. This result confirms that atmospheric DBD plasma generated acidity in water as reduce amount of organic and suspended solid in water.