Linking Phosphorus Extraction from Different Types of Biomass Incineration Ash to Ash Mineralogy, Ash Composition and Chemical Characteristics of Various Types of Extraction Liquids

Phosphorus (P) rich ash from biomass incineration is a potential promising alternative for non-renewable phosphate rock. This study considered the P recovery of poultry manure ash, sewage sludge and meat bone meal through wet chemical extraction. X-ray diffraction analysis showed that these three types had distinct mineralogy. If inorganic acids were used extraction, extraction efficiency was not or only slightly affected by Contrarily, organic acids, alkaline liquid chelating agents considered, highly mineralogy, also elemental composition and/or characteristics liquids. Alkaline liquids in general low heavy metal co-extraction, contrast to acids. From an economic point view, all sulfuric acid most interesting extract types. Oxalic could be more sustainable option ash. In addition, with ethylenediaminetetraacetic relatively high combined co-extraction.