Leaching of Heavy Metals and Recovery of Phosphorus from Sewage Sludge and Sewage Sludge Incineration Ash by Bioleaching with Acidithiobacillus-Strains

摘要

The biotechnological process of bioleaching leads to higher yields in P-recovery combined with of lower mobilisation of heavy metals than chemical leaching similar molar sulphuric acid. Bioleaching with acidified sewage sludge supernatant affords a promising technology for phosphate recovery under ecological and economical aspects.