AAU logo

Research areas

RecoverP Research Areas

The ReCoverP project is a multidisciplinary scientific and engineering collaboration developing technologies for P-recovery from wastewater systems in order to deliver environmental biotechnology solutions. The four main research areas are as follows:

Research area 1: Design of optimal microbial community for P-recovery

Principal investigator:

Per Halkjær Nielsen (Section of Biotechnology, Aalborg University)


Aim:

To design the biological P removal process so the most efficient P-accumulating bacteria are present in the system and to optimize their P-release in digesters.

Deliverables:

Knowledge about the best PAO composition in the WWTP for efficient P-capture in the plant and subsequent P-release in digesters, and recommendation about the best operation of the plant to obtain such PAO composition.

Research area 4: RECOVERY OF P BY USE OF MEMBRANES PRINCIPAL INVESTIGATOR

Principal investigator:

Morten Lykkegaard Christensen (Section of Biotechnology, Aalborg University)


Aim:

To increase P yield and obtain clean effluent by simultaneous concentration and precipitation of P in a membrane crystallizer. To obtain P precipitates with high purity which are easy to dewater resulting in a concentrated product.

Deliverables:

A membrane crystallizer that can be used for concentration and precipitation of phosphate from low concentration feeds. A guideline for operating crystallizers to obtain high purity product that is easy to remove from the liquid phase.

Research area 2: P-pools in wastewater treatment plants and digesters

Principal investigator:

Kasper Reitzel (Department of Biology, University of Southern Denmark)


Aim:

To identify P forms in wastewater, surplus sludge and digester and to develop several interrelated unit operations, which convert P in wastewater sludge into P suitable for production of pure and valuable P feedstock.

Deliverables:

A complete description of P-pools in WWTPs and digesters and a pilot scale “proof of concept” process for efficient conversion of organic P from sewage into inorganic P.

Research area 3:
 Production of well-defined P products

Principal investigator: 

Haiyan Qu (Institute of Chemical Engineering, Biotechnology and Environmental Technology, University of Southern Denmark)


Aim:

To develop a multi-step reactive crystallization process to recover and to produce market competitive P products.

Deliverables:

A well-designed and optimized P-recovery from digester effluents process to produce high purity calcium phosphate and struvite.