Ricerc@Sapienza

Extensive and improper utilization of water from industrial, municipal, and agricultural activities generate 380 trillion L/y of wastewater worldwide. Wastewaters from different sources contain enormous amounts of nutrients such as carbon, nitrogen, and phosphorus. Thus, the recovery of these nutrients via appropriate sustainable process becomes a necessity. Among various processes microalgae-based technologies has attracted considerable attention and its strategies for sustainable and low-cost treatment of wastewater has allowed removal of over 70% nutrient loads from the wastewater.

The world of waste management industry is changing rapidly, and more and more companies are relying on advanced technologies enhanced by state-of-the-art waste management software, able to exploit innovative technologies never seen before. In the waste management industry, as in any other production sector, transparency and clarity of information are required. Indeed, these values are the foundations of the ongoing digital transformation.

This paper is aimed at highlighting the main barriers hampering the development of the industrial symbiosis (IS) practice. The study is divided into two parts. First, a systematic literature review was conducted, in order to identify the barriers mentioned in the literature.

The industrial symbiosis (IS) practice refers to replacing production inputs with wastes generated by other production processes, thus helping to close the loop of manufacturing processes. Companies adopting IS can reduce the amounts of wastes disposed of in landfills and primary inputs used in production processes, enhancing their production efficiency and reducing their production cost.

Industrial symbiosis (IS) is a collaborative approach among firms involving physical exchanges of materials, energy, and wastes, which creates economic advantages for firms and environmental benefits for the society. In this paper, we adopt an ecosystem approach to conceptualize the network of firms involved in IS relationships (ISN), in terms of organisms (firms), functions (waste exchange), and services (environmental benefits), and provide new insight on how to assess and compute IS performance indicators.

The effects of the circular economy are highly debated, and its conceptualization has been accompanied by several controversies among policy-makers and businesses. In this work, we give an empirical contribution to the debate by focusing on the association of the circular economy with some socio-economic variables showing that, regardless of the environmental benefits, measures in favour of the implementation of circular economy practices can significantly and directly contribute to economic growth

as photovoltaic panels. In the case study analysed are shown the benefits
obtained from the investments of the central Italy after installing photovoltaic systems.
The total expenditure for the electricity purchase is € 52.326, while the total benefit of
the investment is € 18.789, equal in percentage to a 53% energy saving over a period
of 20 years. The company expeniture in the absence of a photovoltaic system is equal
to € 109.03, while in the presence of a plant, considering also all costs incurred for €