Industrial symbiosis as a business strategy for the circular economy: identifying regional firms’ profiles and barriers to their adoption

Among the various proposed models for practically developing a circular economy system, industrial symbiosis (IS) is one of the most promising. This paper aims at better understanding the extent to which regional industrial symbiosis practices have been internalized in companies and, second, at identifying the most important barriers that impede a company from the adoption of such practices at regional level. The research is grounded on original data collected using a questionnaire. The results allowed the division of firms into four clusters corresponding to different levels of adoption: (i) the perfectly symbiont companies that undertake all the proposed industrial symbiosis practices; (ii) the non-adopters that are low in terms of IS activities; (iii) the resource savers that focus on the use of by-products or waste from other companies; and the (iv) outbound activity optimizers that concentrate on the sale of their by-products and waste to other companies. Moreover, the results contributed to the identification of regulatory constraints and high investment costs and difficulties in finding financing as significant causes that hinder companies in the adoption of regional industrial symbiosis practices, while networking and logistic barriers appear not to be relevant. To overcome these barriers and to promote the adoption of IS at regional level, supporting the transition towards the circular paradigm, several political and managerial suggestions are proposed.