Carbon Footprint Analysis of Cast Stone Production

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ABSTRACT With the rising environmental concerns Haddonstone is sponsoring this research to assess and reduce their carbon footprint. This research aims to calculate and analyse the carbon footprint associated with Haddonstone’s cast stone production from the Brixworth, Northampton facility to reduce its carbon footprint. The main objectives of the research are to calculate, map, and analyse the carbon emissions; identify areas for carbon footprint reduction; and recommend carbon footprint reduction solutions. The research started with building process maps, collecting data, analysing data, calculating the carbon footprint following a life-cycle assessment approach, mapping the carbon footprint using Energy Value Stream Mapping and Sankey diagrams, analysing the results, and then providing carbon footprint reduction recommendations. The results revealed a total carbon footprint of 0.61888, 0.86293, 0.52460 kg CO2/kg Cast stone for the dry mix, teclite mix, and wet mix respectively, which results in a weighted average carbon footprint of 0.58471 kg CO2/kg Cast stone. For Haddonstone’s planters, the decarbonization effect was found to be 0.49167 kg CO2/month. This means that an average 20 kg planter from Haddonstone will require 23.8 months to become carbon neutral. Raw materials, outbound transportation, packaging materials, wood moulds making, processing materials, and waste contributed the most to Haddonstone’s carbon footprint. Based on these results, the carbon footprint reduction recommendations were to outsource outbound transportation due to the low utilization, use greener packaging materials due to the high embodied carbon, decrease wood moulds making due to the high emissions from wood burning, and eliminate waste within the facility due to its relatively high carbon footprint. Keywords: Carbon Footprint Reduction, Carbon Neutral, Energy Value Stream Mapping, Haddonstone, Sankey Diagrams

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