Concepedia
Statistics
Publications
2
Citations
64
H-Index
Active since
2003
D. Helffrich is an author specializing in biomass energy systems, biomass conversion, and anaerobic digestion.
Publications per year
2003–2003
Hohenheim biogas yield test - comparing various laboratory methods on biomass fermentation.
D. Helffrich, Hans Oechsner · Landtechnik · 2003 · 36 citations
Life Sciences, Biological Engineering, Fermentation Engineering +15
The Hohenheim biogas yield test: comparison of different laboratory techniques for the digestion of biomass.
D. Helffrich, Hans Oechsner · Agrartechnische Forschung · 2003 · 28 citations
Life Sciences, Biosystems Engineering, Solid Waste Management +11
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