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1. (WO2019001673) A METHOD FOR BIOMASS ASSISTED SEPARATION OF PARTICULATE MATTER FROM A LIQUID STREAM AND UPGRADING OF THE COMBINED SOLIDS
ملاحظة: نص مبني على عمليات التَعرف الضوئي على الحروف. الرجاء إستخدام صيغ PDF لقيمتها القانونية

Claims

1. A method of wastewater treatment comprising the steps of;

- providing a filter aid prepared by extrusion of freshly harvested wet lignocellulosic feedstocks or by extrusion of wet lignocellulosic feedstocks having dry matter content 30-75% (w/w);

- using the filter aid to collect sewage sludge from an aqueous wastewater stream ; and

- using the spent filter aid with collected sewage sludge as a substrate for hydro-thermal liquefaction.

2. The method of claim 1 , wherein the spent filter aid with collected sewage sludge has a dry matter content in the range 13-30% w/w.

3. The method of claim 1 , wherein the filter aid comprises at least 30% (w/w) extruded lignocellulosic plant material having a particle size in the range 0.2 mm to 5 mm.

4. The method of claim 1 , wherein no drying step is performed with the spent filter aid with collected sewage sludge prior to its use as a substrate for hydrother-mal liquefaction.

5. The method of claim 1 wherein the filter aid is used to collect sewage sludge in an appropriate mass ratio such that the combined spent filter aid with collected sewage sludge has between 10% and 80% of its solids content provided by the filter aid and between 90% and 20% of its solids content provided by the collected sewage sludge.

6. The method of claim 1 wherein the spent filter aid with collected sewage sludge has a dry matter content (w/w) within the range 13-30%.

7. A substrate for hydrothermal liquefaction comprising a filter aid prepared by extrusion of freshly harvested wet lignocellulosic feedstocks or by extrusion of wet lignocellulosic feedstock with dry matter content 30-75% (w/w) and sewage sludge filtered from an aqueous wastewater stream using the filter aid in which between 10%

and 80% of the substrate dry matter is provided by the filter aid and between 90% and 20% of the substrate dry matter is provided by the collected sewage sludge.

8. A method of hydrothermal liquefaction of sewage sludge comprising the steps of

- providing a substrate for hydrothermal liquefaction according to claim 7, and

- subjecting the substrate to hydrothermal liquefaction.

9. A process comprising:

1. filtering particulate matter from an aqueous stream, using a biomass filter aid prepared by extrusion of freshly harvested wet lignocellulosic feedstocks or by extrusion of wet lignocellulosic feedstocks having dry matter content 30-75% (w/w), t h ereby obtaining

1. a spent biomass filter aid comprising filtered particulate matter from the aqueous stream; and

1. a filtered aqueous stream ; and

2. using the spent filter aid as a feedstock in a thermo-chemical conversion plant.

10. The process according to claim 9, wherein the spent filter aid used in step b), has a dry matter content in the range 13-30% w/w.

11. The process according to claim 9, wherein the filter aid comprises at least 30% (w/w) extruded lignocellulosic plant material having a particle size in the range 0.2 mm to 5 mm.

12. The process according to claim 9, wherein said biomass filter aid comprises fibers having a length to diameter higher than 5 to 1.

13. The process according to claim 9, wherein the aqueous stream is selected from the group consisting of wastewater, such as municipal, domestic and/or industrial sewage wastewater, grey water, storm water and industrial wastewaters from breweries, diaries, abattoirs, chemical manufacturing industry, petroleum/gas tracking, mineral processing and mining industry.

14. The process according to claim 9, wherein the thermo-chemical conversion is selected from the group consisting of hydrothermal carbonization, hydrothermal liquefaction, thermal hydrolysis, combustion, solvothermal liquefaction, hydro-thermal gasification, pyrolysis, and thermocatalytic reforming (TCR), preferably hydrothermal conversion.

15. The process according to claim 9, with the proviso that no drying steps are performed between step a) and step b).