Formation and Destruction of Chlorinated Pollutants during Sewage Sludge Incineration

详细信息    查看全文

• 作者：André ; s Fullana ; Juan A. Conesa ; Rafael Font ; and Sukh Sidhu
• 刊名：Environmental Science & Technology
• 出版年：2004
• 出版时间：May 15, 2004
• 年：2004
• 卷：38
• 期：10
• 页码：2953 - 2958
• 全文大小：193K
• 年卷期：v.38,no.10(May 15, 2004)
• ISSN：1520-5851

文摘

The limitations facing land filling and recycling and theplanned ban on sea disposal of sludge leads to the expectationthat the role of sludge incineration will increase in thefuture. The expected increase in sludge incineration willalso increase scrutiny of the main drawback to sewage sludgeincineration-the formation of hazardous air pollutants(HAPs). Despite the extensive body of knowledge availableon sewage sludge combustion, very few studies havebeen conducted on the formation of HAPs during sludgecombustion. In this work, the interactions between sewagesludge pyrolysis products and sludge ash were investigatedusing a dual chamber flow reactor system and a horizontallaboratory scale reactor. The results of this study shows thatsludge ash can catalyze oxidation and chlorination oforganics. In the absence of HCl in the gas stream, sludgeash acts as an oxidizing catalyst, but in the presence ofHCl, sludge ash acts as a chlorination catalyst producinghigh yields of organochloride compounds.