Recovery of Heavy Metals from Wastewater Treatment and Anaerobic Digester Sludge Using a Chemical Precipitation Process

Increasing global population growth leads to an increase in wastewater sludge production and the demand for renewable energy, which, in turn, results in more wastewater sludge and anaerobic sludge production. These emerging problems raise environmental concerns due to environmental pollution from high organic matter, heavy metals, and pathogens in the sludge. The article aims to curb the indiscriminate disposal of wastewater and anaerobic sludge into landfills while unlocking the potential value of sludge resources. This dual focus aims to enhance environmental responsibility and harness untapped resource value. In summary, this research highlights the rising challenges of increased anaerobic sludge production due to global population growth. By combining sustainable waste management and renewable energy solutions, the study offers a path for efficient sludge management and environmental risk mitigation. This work advocates a balanced approach, promoting both resource optimisation and environmental responsibility, thus advancing sustainable wastewater management.