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This paper highlights how biological waste materials can be used for generating the much needed energy and obtaining nutrient-rich compost for agriculture through anaerobic digestion (AD). The paper further highlights the importance of small and medium enterprises (SMEs) in using AD for converting waste to energy (WTE), leading to many environmental benefits as well as clean energy generation. It would help to reduce pollution, water acidification and carbon emissions that eventually lead to climate change.

The researchers undertook an in-depth study to highlight the role played by an SME in converting WTE and helping towards achieving circularity. An exploratory case-based approach was used to understand value leakage for an AD plant operating on WTE principles in the UK. The plant is still currently active, and it is located in the Midlands, England. Fifteen semi-structured interviews were undertaken with different stakeholders.

This paper reveals the importance of WTE and the significant role played by AD in converting food waste into useful matter. It reports further into the value leakage issue faced in the AD plants. It demonstrates the importance of technological innovation in SME to capture value leakages in a circular model. Most importantly, it demonstrates how SMEs gain competitive advantage and generate value proposition, while they aim for zero waste to landfill objective.

The research involves a case study based on an SME, operating on a circular business model. It will be worth investigating how other businesses could gain competitive advantage. For SMEs interested in AD for WTE, this paper introduces further technological innovation to the AD process to leverage further potential for reuse of waste liquid. Any SMEs entering WTE market ought to take into consideration such design implications.

The paper reveals how the use of waste by SMEs would lead to many environmental benefits as well as clean energy generation. It would help to reduce pollution, water acidification and carbon emissions that eventually lead to climate change. It is useful for addressing the needs of waste food producers and is a cheap raw material for generating energy. The benefits to the public are that it reduces the need for landfill and increases recycling.

The WTE is an effective way of making use of last-stage waste.

Despite SMEs being the powerhouse of the European economies, there is limited research investigating how circular economy (CE) could unlock their potential. Moreover, development of AD in the UK has lagged behind other EU countries. We highlight value leakages and argue how technological innovation should be used to close the value chain loop in the WTE production process. This paper, therefore, demonstrates the important role of an AD process, which involves decomposition of biodegradable materials. It shows that AD is an economically viable and environmentally friendly process of obtaining clean energy at low cost.

Circular procurement is assumed to foster innovation and influence demand for and supply of goods through criteria setting and dialogue with suppliers. However, even in countries placed at the forefront of sustainability practices such as Sweden, examples of procurement that can truly be considered to be circular are rare. This paper aims to examine circular public procurement practices in a selection of Swedish municipalities and regions through the lens of the Advocacy Coalition Framework. The authors propose a categorisation of municipalities by circular procurement uptake and identify factors that support the acceleration of the circular transition in Sweden.

Using the key informant approach, the authors conducted semi-structured interviews with employees of seven municipalities, one region and one external procurement agency, as well as seven suppliers of various sizes. The authors also analysed procurement documents received from municipalities. Participating organisations represented a variety of Swedish local government structures and local conditions.

The authors proposed a categorisation of circular procurement uptake. Notably, beginners differ from leaders in circular procurement, most importantly by the level of flexibility policy brokers have within their organisations and by policy brokers’ ability to accommodate changes that materialise between existing organisational structures and set routines.

The fragmented uptake of circular procurement poses a challenge for local businesses interested in implementing circular business models. It also both highlights and exacerbates inequalities in access to resources between sparsely populated, rural municipalities and more urbanised areas.

Despite existing national government guidelines for the circular economy transition in Sweden, circular procurement is not fully realised at the local level. In this paper, the authors examine the Swedish experience with circular procurement and propose several steps to improve the uptake of circular procurement by the public authorities. The authors' findings concerning the role of policy brokers may well be generalised to similar socio-cultural contexts.