  A generalization of the quantum van der Waals equation of state for a
multi-component system in the grand canonical ensemble is proposed. The model
includes quantum statistical effects and allows to specify the parameters
characterizing repulsive and attractive forces for each pair of particle
species. The model can be straightforwardly applied to the description of
asymmetric nuclear matter and also for mixtures of interacting nucleons and
nuclei. Applications of the model to the equation of state of an interacting
hadron resonance gas are discussed.
