A bibliometric analysis of anaerobic digestion for methane research during the period 1994–2011

This study uses a bibliometric approach in identifying global research trends related to the anaerobic digestion of biomass for methane production using related literature in the Science Citation Index Expanded database, retrieved from the ISI Web of Science. The data used covers the period 1994–2011. The articles acquired from such literature were concentrated on the general analysis by scientific output, the research performances by countries, institutes, and collaborations, and the research trends by the frequency of author keywords, words in title, words in abstract, and ‘KeyWords plus’. The research outputs of anaerobic digestion for methane had notably increased in the field of environmental sciences, biotechnology and applied microbiology, environmental engineering, energy and fuels, and microbiology, while increased slightly in water resources. The USA with most publications and China with the highest growth rate were compared. Finally, author keywords, words in title and ‘KeyWords plus’ were analyzed contrastively, with the recent hotspots provided.

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