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论文类型： 期刊论文

发表时间： 2013-03-01

发表刊物： BIORESOURCE TECHNOLOGY

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 131

页面范围： 527-530

ISSN号： 0960-8524

关键字： Graphene oxide; Anammox; Biological nitrogen removal; Extracellular polymeric substances

摘要： Graphene oxide (GO) was applied in this study to enhance the activity of anaerobic ammonium oxidation (anammox) bacteria for nitrogen removal. A GO dose-dependent effect on anammox bacteria was observed through batch tests. The results showed that the activity increased as the GO dose was varied within 0.05-0.1 g L-1. A maximum 10.26% increase of anaerobic ammonium oxidizing activity was achieved at 0.1 g L-1 GO. Analysis of extracellular polymeric substances (EPS) indicated that the highest carbohydrate, protein, and total EPS contents (42.5, 125.7, and 168.2 mg (g volatile suspended solids)(-1), respectively) were obtained with 0.1 g L-1 GO. Appropriate GO dose stimulated EPS production to promote the activity of anammox bacteria. Transmission electron microscopy showed the large surface area of GO benefited cell attachment. These findings proved that the application of GO was an effective approach to enhancing the activity of anammox bacteria. (C) 2013 Elsevier Ltd. All rights reserved.