(1) To develop programs which promote education, use and development of economically and environmentally feasible digesters and by-product management technology. Such programs may include loan and grant programs.

(2) To work in concert with the board to continually evaluate emerging practices, methods and technology regarding digesters and by-product management technology.

(3) To promulgate regulations concerning this act and programs developed under this act. Prior to promulgation of regulations, the department shall have the power to recommend and implement interim guidelines for the purpose of facilitating the initial development of programs established under this act. Such interim guidelines shall be replaced by regulations within two years of their effective date.

(4) To review, with the advice of the board, program criteria and to periodically evaluate and make appropriate changes in those criteria by regulation.