Bioleaching of Heavy Metals From Sewage Sludge for Land Application

X. Y. Gu*, Jonathan W C WONG, R. D. Tyagi

*Corresponding author for this work

Research output: Chapter in book/report/conference proceedingChapterpeer-review

33 Citations (Scopus)


Reuse of sewage sludge as fertilizer in agricultural lands is frequently restricted by heavy metals enriched during wastewater treatment. This has led to increasing research on decontamination of metal-laden sewage sludge with the aim to prevent environmental pollution and health risks from heavy metals. Over the years, bioleaching has been developed as a cost-effective and environmentally friendly technology for the removal of heavy metals from sewage sludge. This chapter presents an overview on the fundamental principles involved in metal solubilization during sludge bioleaching and updates research concerned with this emerging area. The effects of a number of operational parameters including initial pH, temperature, aeration, leaching medium and substrate concentration, sludge solids content, and sludge-derived organic compounds on the process performance are reviewed.

Original languageEnglish
Title of host publicationCurrent Developments in Biotechnology and Bioengineering
Subtitle of host publicationSolid Waste Management
PublisherElsevier Inc.
Number of pages25
ISBN (Electronic)9780444636751
ISBN (Print)9780444636645
Publication statusPublished - 2017

Scopus Subject Areas

  • Biochemistry, Genetics and Molecular Biology(all)

User-Defined Keywords

  • Acidithiobacillus
  • Heavy metal
  • Land application
  • Leaching
  • Sewage sludge


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