Economic aspects of sewage sludge management

Environmental performance and economic sustainability are becoming increasingly important, and the treatment of wastewater and its byproducts is crucial. Wastewater treatment companies often operate within a system where internal costs are accounted for, while the negative externalities associated with their operations are not. These are sometimes “minor” externalities when viewed solely through the lens of strict neoclassical economics, yet they have a significant impact on the environment and public health.

For example, sewage sludge used in agriculture, if contaminants are not monitored, can pose a high risk of entering the food chain, which is harmful to human health and ecosystems.

This article therefore seeks to examine the complexities surrounding the various costs of sewage sludge management and the weaknesses of existing economic models. While exploring a range of internal costs such as investment, operating costs, and financial expenses, this article also examines the external costs associated with environmental and health issues.

This article attempts to analyze in detail the economic instruments available to help decision-makers choose their sludge management options and to examine the potential impacts on water pricing. It will also consider regulatory economic mechanisms—such as pollution taxes and subsidies for resource recovery—designed to internalize the often-underestimated externalities in the market.

Finally, the goal is to move toward more sustainable sewage sludge management that balances the demands of economic, environmental, and social justice considerations.