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论文类型：期刊论文

发表时间：2015-08-05

发表刊物：SCIENTIFIC REPORTS

收录刊物：SCIE、PubMed、Scopus

卷号：5

页面范围：12732

ISSN号：2045-2322

摘要：This study presents a novel procedure for accelerating methanogenesis from wastewater by adding elemental manganese into the anaerobic digestion system. The results indicated that elemental manganese effectively enhanced both the methane yield and the production rate. Compared to the control test without elemental manganese, the total methane yield and production rate with 4 g/L manganese addition increased 3.4-fold (from 0.89 +/- 0.03 to 2.99 +/- 0.37 M/gVSS within 120 h) and 4.4-fold (from 6.2 +/- 0.1 to 27.2 +/- 2.2 mM/gVSS/h), respectively. Besides, more acetate consumption and less propionate generation were observed during the methanogenesis with manganese. Further studies demonstrated that the elemental manganese served as electron donors for the methanogenesis from carbon dioxide, and the final proportion of methane in the total generated gas with 4 g/L manganese addition reached 96.9%, which was 2.1-fold than that of the control (46.6%).