Veolia Water Solutions & Technologies Support

The University of Queensland

Otv Sa

Paques Biomaterials Holding B.v.

Stowa

Alan Gideon Werker

Simon Olof Harald Bengtsson

Peter Stig Tomas Johansson

Patric Jannasch

Per Olof Gösta Magnusson

Maria Da Graca Ejarque Albuquerque Cordeiro Pereira

Maria Ascensao Carvalho Fernandes De Miranda Reis

Paulo Alexandre Da Costa Lemos

Carl Anton Börje Karlsson

Steven Pratt

Bronwyn Glenice Laycock

Mónica Vanessa Arcos Hernández

Franciscus Hubertus Jacobus Maurer

Fernando Morgan-Sagastume

Per Olof Magnusson

Simon Olof Bengtsson

Maria Ascencao De Miranda Reis

Carl Anton Karlsson

Elise Marie Blanchet

Franciscus Hubertus Maurer

Peter Stig Johansson

A method of biologically treating wastewater and, at the same time, incorporating processes that aim to increase the PHA accumulation potential of biomass used in the treatment of the wastewater. The method includes biologically treating the wastewater and enhancing PHA accumulation potential of the biomass by subjecting the biomass to a primary feast-famine process where the biomass is subjected to repeated cycles of feast and primary famine conditions. From time-to-time, the method entails deviating from the primary feast-famine process to a secondary famine process. The secondary famine process comprises subjecting the biomass to secondary famine conditions for a period of time that is substantially greater than the average time period of the primary famine conditions.

Biological wastewater treatment processes that enhances the capacity for polyhydroxyalkanoate accumulation in a mixed culture biomass

The invention is directed to a method of increasing the chemical and/or thermal stability of PHA in biomass where the biomass is contained within mixed liquor, and wherein the mixed liquor is treated by a combination of removing water from the mixed liquor and pH adjustment of the mixed liquor or maintenance of the pH of the mixed liquor within a selected pH range, and wherein the method includes reducing the pH of the mixed liquor below 6, or maintaining the pH of the mixed liquor below 6 for a selected period of time, and wherein the pH adjustment of the mixed liquor to below 6 or the maintenance of the pH of the mixed liquor below 6 gives rise to an increase in chemical and/or thermal stability of the PHA in the biomass.

Method for recovery of stabilized polyhydroxyalkanoates from biomass that has been used to treat organic waste

A method of enhancing mechanical properties of compounds formed with polyhydroxyalkanoates (PHA) recovered by biomass where the biomass comprises PHA and non-PHA materials. The method includes dissolving the PHA and non-PHA materials in a solution and separating the PHA and non-PHA materials from the solution. Further, the method includes compounding the separated PHA material and at least some of the separated non-PHA material into a compounded plastic having improved mechanical properties.

Method of producing polyhydroxyalkanoate compounded plastics having improved mechanical properties

A method or process for producing polyhydroxyalkanoates (PHAs) in biomass. The process entails feeding an organic carbon containing substrate to biomass enriched in PHA accumulating bacteria. Particularly the process entails intermittently supplying the substrate to the biomass at least three separate times over a selected period. The object of the process is to produce PHA having a relatively high molecular weight, at least 400,000 g/mole. By controlling the frequency at which the substrate is supplied to the biomass and by feeding a sufficient amount of the substrate to the biomass, the method or process produces the PHA having the relatively high molecular weight.

Method for accumulation of polyhydroxyalkanoates in biomass with on-line monitoring for feed rate control and process termination

A process is provided for increasing the production of PHA in a mixed culture biomass. In a first stage of the process, organic material associated with a substrate is converted to volatile fatty acids. In the case of a wastewater treatment process, if the wastewater includes sufficient volatile fatty acids (VFAs) to support the process, then it is unnecessary to convert organic material to VFAs. In a second stage of the process, an anaerobic-aerobic selection process is utilized to select glycogen accumulating organisms that cause these organisms to proliferate and dominate the open mixed culture biomass. By providing relatively high organic loading in the form of VFAs in the anaerobic treatment phase of the selection process, glycogen accumulating organisms having a relatively high level of stored glycogen are produced. In a third stage, the PHA accumulation process is practiced where the glycogen rich organisms are fed VFAs under anaerobic or aerobic conditions or combinations thereof. Through the consumption of externally supplied VFAs and internally stored glycogen, relatively high levels of PHA in the biomass are produced. Thereafter PHA is separated from the residual biomass.

Process for maximizing PHA production in glycogen accumulating organisms

Growing community of inventors

Lomma, Sweden

Alan Gideon Werker