Improvement of water quality using dielectric barrier discharge plasma

Abstract

Abstract. 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.

Improvement of oxidation stability of fatty acid methyl esters derived from soybean oil via partial hydrogenation using dielectric barrier discharge plasma

“…The process is able to hydrogenate heavy oil in the cracking process for light product generation 65 . The technique can be utilized to create other atomic species: oxygen and nitrogen atoms (air plasma) for wastewater treatment, nitrogen atoms for ammonia production, and synthesis gas production 34,66,67 …”

“…65 The technique can be utilized to create other atomic species: oxygen and nitrogen atoms (air plasma) for wastewater treatment, nitrogen atoms for ammonia production, and synthesis gas production. 34,66,67 4 | CONCLUSIONS Partially hydrogenated FAME was successfully produced in the parallel-plate DBD plasma reactor. The optimized condition was 25% H 2 , 5.5 hours of reaction time, and ambient temperature.…”

System electro-neutralizer of agrochemicals contained in food and water samples through electrons trap

“…Diverse scientific evidences were related in this work, proving that the accumulation of energy of any kind always provides varied physical and chemical reactions and logically that many of these reactions are not yet fully understood and dominated (Niva et al, 2016;Nunes & Espíndola, 2012;Quyen et al, 2017;Santos et al, 2011;Sarantópoulos et al, 2017;Serway & Jewett, 2014;Souza, 2010;Ten Bosch et al, 2017;Vieira et al, 2002;Xijun et al, 2012). This empirical database provides a dynamic curiosity for future studies, which may lead to revelations not yet well understood, for example: electrostatic accumulation does not provide significant damage to protein denaturation; however it significantly degrade the acids and alkalis conditions in this medium.…”

An Overview of Recent Developments in Improving the Photocatalytic Activity of TiO2-Based Materials for the Treatment of Indoor Air and Bacterial Inactivation

“…The primary pollutants confronted in indoor air include carbon monoxide (CO), micro-organisms (fungi, bacteria, and viruses), nitrogen oxides (NOx), and a multitude of varieties of volatile organic compounds (VOCs) [ 5 ]. Given that in France, agri-food companies represent 15.3% of manufacturing industries with more than 17,647 companies [ 6 ], it is therefore essential and urgent to employ the purification system technology more effectively [ 7 , 8 ].…”