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论文类型：期刊论文

发表时间：2012-10-24

发表刊物：SEPARATION AND PURIFICATION TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：100

页面范围：9-14

ISSN号：1383-5866

关键字：Surface discharge; p-Nitrophenol; COD removal; Biodegradability

摘要：A multi-tube parallel surface discharge plasma reactor has been designed to investigate its mineralization potential for organic wastewater. p-Nitrophenol (PNP) was used as the target pollutant. The effects of some operational parameters such as solution pH value, discharge voltage, air flow rate and air moisture on COD removal were investigated. Ozone utilization and biodegradability (BOD5/COD) of wastewater were evaluated. The results indicated that this discharge system presented a great potential for COD removal. For 40 L of PNP wastewater, complete PNP removal and 97% of COD removal efficiency were achieved after 1 h of discharge treatment with energy yield of 27.4 g(COD) kW h(-1), and correspondingly, the ozone consumption and ozone utilization efficiency were 80% and 1.3 g(COD) g(O3)(-1). Increasing solution pH value and increasing discharge voltage were both beneficial for COD removal. The optimal air flow rate was observed as 1.5 m(3) h(-1). Dry air contributed to a greater COD removal efficiency, due to more O-3 generation. The biodegradability of PNP wastewater increased up to 0.42 after 1 h of treatment. (c) 2012 Elsevier B.V. All rights reserved.