Design and trial of a comprehensive home composting evaluation tool

Purpose: In this study, a comprehensive home composting evaluation tool (HCET) was designed and trialled to support the analysis of empirical and quality assurance parameters of home composting systems. Methods: The proposed HCET was developed based on a review of relevant scientific literature, a range of ‘how to’ / ‘good practice’ guidelines for home composting, and guiding principles from the New Zealand Compost Standard. It was then trialled within a research project examining home composting practices in Palmerston North, Aotearoa New Zealand. Results: This research showed that whilst home composting is widely undertaken in Palmerston North and diverts a significant amount of organic waste from landfill, home composters often encounter technical challenges and have variable results. Critical reflection on the practical experience of trialling the draft HCET in the context of the broader findings from the research project enabled the HCET to be refined and finalised. Conclusion: A growing body of literature demonstrates that home composting is a popular and cost-effective opportunity to divert municipal organic waste from landfill, reduce greenhouse gas emissions and enhance local soils and home gardening. As such, effective and systematic evaluation of the various home composting technologies, practices and outputs is a critical opportunity to accelerate the development of a more sustainable, low emission circular bioeconomy. The proposed HCET provides a quick, accurate and effective way to undertake data collection and system analysis, which will support future research further developing and optimising home composting technologies and practices. Research Highlights • Home composting is a cost-effective opportunity to divert organic waste from landfill, reduce greenhouse gas emissions and enhance home gardening. • A comprehensive home composting evaluation tool was designed and trialled to support the analysis of empirical and quality assurance parameters of home composting systems. • The proposed tool provides a quick, accurate and effective way to undertake data collection and analysis to inform improved home composting practices.