Pyrolysis plays a major role in investigation of continuous biochar production from flowerrnwaste. It is a thermal decomposition processes that occurs at moderate temperatures in whichrnthe biomass is slowly heated in the absence of oxygen or air to produce biochar.rnOnce the flower have been harvested its waste is usually thrown away without considerationrnfor other uses. Freesia Ethiopia Plc. is one of the flower producer in Ethiopia located in Sululta.rnIt produces approximately 700kg waste per day. This waste is thrown away to the field withoutrnconsidering for other use. As fossil fuel is depleting, there is an urgent need to exploit any typernof biomass as renewable sources by converting them to various forms of green fuels such asrnbiochar. rnThe main objective of this research is to use simulation and experimental investigation ofrncontinuous biochar production from flower waste. The simulation is done by modelling twornreactors the inner and outer and simulating the temperature distribution along the length of thernreactor and energy flows through them. rnThe overall methods used for this research paper is described as follows. First feed stockrncollection, preparation, its ultimate and proximate analysis i.e. characterization has beenrnperformed. Second, the three dimensions of the reactor with the screw conveyor is modelledrnusing CATIA software and then imported in COMSOL5.0. Then after temperature profilernalong the length of reactor has been simulated to study temperature distribution. Subsequently,rnheat flux were added to investigate the temperature profile on the reactor and product yields.rnFinally, manufacturing and experimental investigation was conducted. Using slow pyrolysisrnprocess great biochar yields could be produced for the experiment conducted with the pyrolysisrntemperature of 293rnornC to 773rn ornC at heating rate of 50rn ornC/min. An original screw reactor machinernwhich has a capacity to produce 470 kg biochar per day in continuous operating mode wasrndesigned, manufactured and tested. This findings support the potential to prepare biochar fromrnflower waste by slow pyrolysis processes.