Use custom .bst style file with biblatex

Question

I want to use my own bibtex style (from a .bst file) in combination with the biblatex package (I want to use this package to have separate bibliographies for each part). Since the \bibliographystyle{} command cannot be used with the biblatex package, how do I import it?

\documentclass[b5paper, twoside, 11pt]{book}
\usepackage{blindtext}

\usepackage[hmargin=2.5cm,vmargin=2.5cm]{geometry} 
\usepackage[style=numeric,doi=false,isbn=false,eprint=false,url=false,firstinits=true,backend=bibtex,refsection=part]{biblatex} % used to make seperate references for each part
\addbibresource{bibfile.bib}
%\bibliographystyle{style} % <- want to include a style.bst file here

\begin{document}
\cleardoublepage
\part*{Introduction}
\Blindtext
\cite{...}
\Blindtext
\printbibliography

\part{Part I}
\Blindtext
\cite{...}
\Blindtext
\printbibliography

\end{document}