title: Non-thermal plasma for air and water remediation.
abstract: A modular typed dielectric barrier discharge (DBD) device is designed and tested for air and water remediation. The module is made of a number of DBD tubes that can be arranged in series or parallel. Each of the DBD tubes comprises inner electrode enclosed with dielectric barrier and arranged as such to provide a gap for the passage of gases. Non-thermal plasma generated in the gap effectively creates gaseous chemical reactions. Its efficacy in the remediation of gas stream containing high NOx, similar to diesel emission and wastewater containing latex, are presented. A six tubes DBD module has successfully removed more than 80% of nitric oxide from the gas stream. In another arrangement, oxygen was fed into a two tubes DBD to generate ozone for treatment of wastewater. Samples of wastewater were collected from a treatment pond of a rubber vulcanization pilot plant. The water pollution load was evaluated by the chemical oxygen demand (COD) and biological oxygen demand (BOD5) values. Preliminary results showed some improvement (about 13%) on the COD after treatment and at the same time had increased the BOD5 by 42%. This results in higher BOD5/COD ratio after ozonation which indicate better biodegradability of the wastewater.
authors.affiliation: Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia. Electronic address: aiasah@nm.gov.my.
authors.forename: Siti Aiasah
authors.initials: SA
authors.lastname: Hashim
authors.affiliation: Plasma Technology Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Farah Nadia Dayana Binti
authors.initials: FN
authors.lastname: Samsudin
authors.affiliation: Plasma Technology Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Chiow San
authors.initials: CS
authors.lastname: Wong
authors.affiliation: Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia.
authors.forename: Khomsaton
authors.initials: K
authors.lastname: Abu Bakar
authors.affiliation: Plasma Technology Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Seong Ling
authors.initials: SL
authors.lastname: Yap
authors.affiliation: Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia.
authors.forename: Mohd Faiz
authors.initials: MF
authors.lastname: Mohd Zin
mesh_terms: D000388:Air; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D004560:Electricity; D009569:Nitric Oxide / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D058626:Plasma Gases / Q000737:chemistry*; D012408:Rubber; D062065:Wastewater; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D009569:Nitric Oxide; D010100:Oxygen; D058626:Plasma Gases; D012408:Rubber; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical
keywords: Biological oxygen demand; Chemical oxygen demand; Dielectric barrier discharge; Nitric oxide; Ozonation