This paper is not a review on MFC alone but on the hybrid of
wastewater treatment systems. MFC is just one of them which is
categorized under chemical–biological hybrid system; therefore
this review paper is geared towards this method of classification
i.e. based on “hybrid” schemes. We have classified all the possible
hybrid wastewater treatment systems which can be applied in the
treatment process. Furthermore, the advantages and disadvantages
of the hybrid system are discussed in detail. The
notable advantages of the hybrid wastewater treatment system are
more stable and sustainable voltage generated, better overall
efficiency and energy saving. Nevertheless, some hybrid systemmay require high operating cost and is discussed in this paper. The
future trend of the treatment process was reviewed and predicted.
This paper can be a great source of information to the readers to
consider the possible combinations of hybrid systems available
which can help to improve the efficiency in the treatment system
and at the same time, some combinations can even generate bioenergy
which can be possibly fed to the plant for energy savings.