Making sense of sewage sludge as a renewable resource in the urban U.S.

Prior to industrialization, human excrement was commonly employed as a resource for agricultural fertilization. Following the advent of the hydraulic sanitation system, however, it became increasingly channeled into waterways rather than reincorporated into terrestrial agro-ecosystems. To counter this trend, more and more industrial cities are seeking to utilize treated sanitation waste, or “biosolids,” as a renewable resource that can be applied as a soil amendment in urban recreational settings, including parks, gardens, and golf courses. This article examines how the use of biosolids in the American city of Chicago comes to “make sense”—experientially, economically, and ecologically—to users and wastewater experts. Furthermore, it considers how sanitation infrastructures, social norms, and safety concerns both contour and constrain such usage. Ultimately, this article identifies how direct sensorial experiences (particularly of odors or their absence) as well as notions of economic and ecological “good sense” contribute to the social acceptability of biosolids usage. However, contaminants of emerging concern that are barely perceptible in sanitation waste raise more profound questions about the challenges of urban sustainability in this period known as late industrialism.