REUSE OF SEWAGE TREATMENT PLANT SLUDGE AS BIOACTIVE MATERIAL: A REVIEW OF THE ENVIRONMENTAL ISSUES INVOLVED
Keywords:
Sustainability, Environmental Contamination, Sludge ReuseAbstract
Sewage sludge is an important byproduct of the sewage treatment process, and its proper management is widely discussed by the scientific community due to two main issues: its potential as a bioactive material and the environmental risks associated with improper disposal. Due to the lack of effective alternatives and current paradigms related to sludge reuse, the objective of this work was to review the literature to facilitate understanding of different sludge treatment options for safe reuse. The VOS Viewer software, a tool for constructing bibliometric networks, was used to analyze relevant studies evaluating different sludge treatment technologies, including physical-chemical, biological, and thermal processes, to identify the advantages and disadvantages of each and their potential for ensuring the safety of sludge reuse. The themes were also contextualized with current legislation that provides legal support for the correct execution and maintenance of sewage treatment plant sludge reuse. It is expected that the results of this review will help guide those responsible for managing sludge in choosing the most appropriate technology for the treatment and safe reuse of this byproduct, contributing to the reduction of environmental risks and the promotion of sustainability.
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