Sequenced Bioleaching and Bioaccumulation of Phosphorus from Sludge Combustion - A New Way of Resource Reclaiming -

The recovery of phosphorus from sewage sludge incineration ash as well as the separation of heavy metals from ash was investigated by using the biotechnological process of bioleaching and bioaccumulation of released phosphorus by newly developed syntrophic population of bioleaching bacteria, Acidithiobacillus spec. strains, and polyphosphate (poly-P) accumulating bacteria, the AEDS-population (Acidithiobacillus spec. enriched digested sludge). The biologically performed solubilization of phosphorus from sewage sludge incineration ash is accompanied by the release of toxic metals. Therefore a combined process to separate phosphorus from heavy metals by achieving a plant available phosphorus-enriched product and a metal depleted ash was designed. Leaching experiments were conducted in leaching reactor containing a bacterial stock culture of Acidithiobacillus spec. Following step was the enhancement of P-recovery in combining bioleaching with simultaneous bio- P-accumulation by AEDS-population. The uptake of phosphorus in biomass reaches up to 66 % of the mobilized phosphorus by bioleaching. The combined biologically performed technology of phosphorus leaching and separation from toxic metals by simultaneous bioaccumulation developed in this work is a promising economical and ecological process for the recovery of phosphorus from waste solids.

 

 

 

 

Rechtliche und praktische Unsicherheiten bei der Durchführung des europäischen Klimaanpassungsrechts durch das Bundes- Klimaanpassungsgesetz (KAnG)
© Lexxion Verlagsgesellschaft mbH (6/2025)
In the context of the European Climate Law (EU) 2021/1119), the Governance Regulation (EU) 2018/1999 and the Nature Restoration Regulation (EU) 2024/1991, the KAnG came into force on July 1, 2024.

Transformatives Klimarecht: Raum, Zeit, Gesellschaft
© Lexxion Verlagsgesellschaft mbH (6/2025)
This article contends that climate law should be conceived as inherently transformative in a double sense. The law not only guides the necessary transformation of economy and society, but is itself undergoing transformation.

Maßnahmen zur Klimaanpassung sächsischer Talsperren
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (5/2025)
Die Landestalsperrenverwaltung des Freistaates Sachsen (LTV) betreibt aktuell insgesamt 87 Stauanlagen, darunter 25 Trinkwassertalsperren. Der Stauanlagenbestand ist historisch gewachsen und wurde für unterschiedliche Zwecke errichtet.

 

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