New Automated Method For Macro-Contaminant Analysis:  Industrial Applications, 2016 Pulping, Engineering, Environmental, Recycling, Sustainability (PEERS) Conference Proceedings

In recycled paper processes, stickies are at the origin of many production disturbances. In this paper, we present how the recently developed method for macro-contaminant analysis was used with industrial samples for process analysis. The new automated stickies measurement method allows to (i) determine the 3 dimensional morphology of screened particles (without any deformation) and (ii) classify the particles as stickies among contaminants. This is achieved by a combination of laser triangulation and local near-infrared (NIR) spectroscopy.

Measurement of macro-contaminants in pulp samples and their classification allows concluding on their specific removal. Chemical nature and amount of the macro-contaminants coming from different raw materials were studied and were shown to be very different in two different mills. In an Asian mill, a low PSA removal in the process (46%) was found in comparison with high other stickies removal (99%). Besides, perspectives with this device are shown, with the on-going development of a new on-line sensor for macro-contaminant analysis.  

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