D. D. Hempel

Determination of local phase holdups in airlift reactors by means of time‐domain‐reflectometry

Birgit Kochbeck, M. Lindert, D. D. Hempel, 1997 .

Biological treatment of effluents from a coal tar refinery using immobilized biomass

D. D. Hempel, Paul Hüppe, Dr.-Ing. Dietmar Christan Hempel, 1990 .

Fluid dynamics and mass transfer in a bubble column with suspended particles

D. D. Hempel, T. Sauer, 1987 .