Recycling Opportunities in a High Volume Academic Clinical Chemistry Laboratory

Abstract

Abstract Many sectors of industry, including the biomedical sector, have quantified waste, and created sustainability strategies to mitigate its environmental impact. One of these strategies utilizes the waste hierarchy, a model which ranks the concepts reduce, re-use and recycle in order of the most to least sustainable practice. However, to date, the clinical laboratory has seldom been evaluated for total waste production and mitigation strategies and additional public reporting of the physical amount of waste produced in these areas are lacking in the literature. In this study, we aimed to identify specific wastes produced from performing the CMP over the course of a year in our automated clinical chemistry laboratory and what proportion would be recyclable. The total in- and outpatient testing volumes as well as volumes of quality control and calibrations needed to perform the CMP at our institution were collected retrospectively from 07/14/2021 - 07/14/2022. We further identified disposables waste items such as calibrator kits, quality control kits, patient blood specimen tubes, shipping packaging and reagent wedge kits that are necessary to perform the CMP. In addition, to obtain a conservative and consistent evaluation to the total amount of waste produced from the CMP, the average weights for components of the reagent test wedge kits which includes plastic wedges, cardboard shipping boxes, and paper package inserts were calculated. These weights in conjunction with total testing volumes was used to determine the total, recyclable, and non-recyclable waste produced from these disposable items. A total of 1089.2 kg of reagent kit wastes were estimated to be produced by performing the CMP over the course of a year. Of this waste, cardboard shipping boxes and paper package inserts were determined to be recyclable (233.6 kg) and the plastic reagent wedges were determined to be non-recyclable (855.5 kg) as they were not labelled with the universally recognized recycling code, were composed of proprietary plastic material, and contained biohazardous contaminants. Overall, 21.4 % of the total specific waste weight was found to be recyclable. The CMP is a small subset of the clinical chemistry test menu that produces a considerable amount of recyclable and non-recyclable waste.