In addition to reducing production costs of biosurfactants, other
strategies need to be evaluated such as application of other types of
biosurfactants or mixtures of biosurfactants with reduced concentrations
of individual surfactants, and also the intermittent
addition of biosurfactant to reduce application costs. It should be
considered that the continuous addition of product can reduce the
concentration required to obtain the same disposal reduction
percentage, which would also contribute to reduce costs. Although
the biosurfactant application cost is still a limiting factor, the
National Policy on Solid Wastes implemented in Brazil since
2010 imposes restrictions on the final disposal of biological sludge
in sanitary and industrial landfills. Thus, investments in research in
this field are expected to increase considerably in the coming years,
which should help to reduce costs.