You required two legal Certificates to set-up this plant-
a. SSI (Small Scale Industry) Certificate.
b. NOC (No objection Certificate) from PCB (Pollution Control Board)
As such there is no problem to get the NOC i.e consent to establish from Pollution Control Board, but it also depends upon the state PCB norms to set up this project.
Here is this article by Divya International to give an idea regarding Karantaka Pollution Control Board norms to set-up pyrolysis plant.