CA2464090A1 - A method for preparing a homogenous cellulosic product from cellulosic waste materials - Google Patents
A method for preparing a homogenous cellulosic product from cellulosic waste materials Download PDFInfo
- Publication number
- CA2464090A1 CA2464090A1 CA 2464090 CA2464090A CA2464090A1 CA 2464090 A1 CA2464090 A1 CA 2464090A1 CA 2464090 CA2464090 CA 2464090 CA 2464090 A CA2464090 A CA 2464090A CA 2464090 A1 CA2464090 A1 CA 2464090A1
- Authority
- CA
- Canada
- Prior art keywords
- vessel
- materials
- products
- steam
- cellulosic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract 57
- 239000002699 waste material Substances 0.000 title claims 2
- 239000000463 material Substances 0.000 claims abstract 29
- 239000000809 air pollutant Substances 0.000 claims abstract 12
- 231100001243 air pollutant Toxicity 0.000 claims abstract 12
- 239000012855 volatile organic compound Substances 0.000 claims abstract 12
- 239000007789 gas Substances 0.000 claims abstract 9
- 238000007599 discharging Methods 0.000 claims abstract 6
- 239000000126 substance Substances 0.000 claims abstract 6
- 238000010926 purge Methods 0.000 claims abstract 5
- 238000009738 saturating Methods 0.000 claims abstract 5
- 238000007789 sealing Methods 0.000 claims abstract 4
- 239000002906 medical waste Substances 0.000 claims abstract 2
- 239000010832 regulated medical waste Substances 0.000 claims abstract 2
- 230000010006 flight Effects 0.000 claims 6
- 239000002245 particle Substances 0.000 claims 4
- 238000004064 recycling Methods 0.000 claims 4
- 238000001816 cooling Methods 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 2
- 230000002745 absorbent Effects 0.000 claims 1
- 239000002250 absorbent Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 239000010893 paper waste Substances 0.000 claims 1
- 231100000719 pollutant Toxicity 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L11/00—Methods specially adapted for refuse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0075—Disposal of medical waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Paper (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
A method for treating diverse pulp and paper materials, including such products contained in municipal solid waste and biohazardous wastes, to produce a homogenous cellulosic product comprises the steps of feeding diverse pulp and paper materials into a vessel, introducing steam into the vessel while agitating the materials, purging the gases from the vessel while agitating the materials, sealing the vessel so that the vessel is pressure tight, saturating the materials with steam at sufficient temperature and pressure to expand the physical and chemical structure of the materials, while agitating the materials, depressurizing the vessel to further enhance the physical and chemical expansion of the materials, and discharging the processed products. Alternatively, the method can be performed without purging the gases, if the temperature in the range of about 140 ~C to about 160 ~C, and the pressure is in the range of about 275 to 450 kPa. During the optional purging step, during the depressurization step, and during the optional evacuation step, volatile organic compounds and other air pollutants can be captured and treated. The temperature, pressure, and process time is more than sufficient to decontaminate and sterilize biohazardous laboratory and medical wastes.
Claims (47)
1. ~A method for treating diverse pulp and paper materials to produce a homogenous cellulosic product comprising the steps of:
feeding diverse pulp and paper materials into a vessel;
introducing steam into the vessel while agitating the materials;
purging gases from the vessel through a vent valve while agitating the materials;
capturing and treating said gases to render any volatile organic compounds and any other air pollutants present in the gases harmless;
sealing the vessel so that the vessel is pressure tight;
saturating the materials with steam at sufficient temperature and pressure to expand the physical and chemical structure of the materials, while agitating the materials;~~~
depressurizing the vessel to further enhance the physical and chemical expansion of the materials; and discharging the processed products from the vessel.
feeding diverse pulp and paper materials into a vessel;
introducing steam into the vessel while agitating the materials;
purging gases from the vessel through a vent valve while agitating the materials;
capturing and treating said gases to render any volatile organic compounds and any other air pollutants present in the gases harmless;
sealing the vessel so that the vessel is pressure tight;
saturating the materials with steam at sufficient temperature and pressure to expand the physical and chemical structure of the materials, while agitating the materials;~~~
depressurizing the vessel to further enhance the physical and chemical expansion of the materials; and discharging the processed products from the vessel.
2. ~The method of claim 1 wherein the method further includes the step of classifying cellulosic components of the processed products from other components.
3. ~The method of claim 2 wherein the step of classifying includes the step of separating the cellulosic components based on particle size.
4. ~The method of claim 2 wherein the step of classifying includes the step of separating the cellulosic components based on density.
5. ~The method of claim 2 wherein the step of classifying includes the step of separating the cellulosic components based on both particle size and density.
6. ~The method of claim 1 wherein the method further includes the steps of separating larger size components of the processed products and recycling the larger size components through the vessel for more processing.
7. ~The method of claim 1 wherein the method further includes the step of introducing the steam from the depressurized vessel into a second vessel containing diverse pulp and paper materials for purging gases from the second vessel prior to sealing the vessel for treatment of the materials within the second vessel.
8. The method of claim 7 wherein the method further includes the steps of discharging processed products from each of a plurality of the vessels into a common conveyed stream, separating larger components from smaller components in the stream, and recycling the larger components through at least one of the vessels.
9. The method of claim 1 wherein the saturating step occurs at a temperature in the range of about 140°C to about 160°C.
10. The method of claim 1 wherein the saturating step occurs at a pressure in the range of about 275 kPa to about 450 kPa.
11. The method of claim 1 wherein the pulp and paper materials have a moisture content of about 20% to about 60% by weight prior to the step of introducing steam.
12. The method of claim 1 wherein the temperature and pressure are maintained for a time sufficient for the products to be uniformly mixed and transformed into the homogenous cellulosic product.
13. The method of claim 12 wherein the time is in the range of about 30 to about 60 minutes.
14. The method of claim 1 wherein the vessel includes a common opening serving as an inlet and outlet and the steps of feeding the diverse pulp and paper materials into the vessel and discharging the processed products from the vessel are both accomplished through the common opening.
15. The method of claim 14 wherein the vessel includes two or more internally mounted helical flights, the rotation of which agitates the pulp and paper products.
16. The method of claim 15 wherein the rotation of the helical flights in one direction causes the products to move away from the common opening.
17. The method of claim 16 wherein the rotation of the helical flights in a second direction causes the products to move toward the common opening.
18. The method of claim 14 wherein the vessel is capable of being tilted such that the common opening is positioned to not permit the products to fall out of the vessel.
19. The method of claim 14 wherein the vessel is capable of being tilted such that the common opening is positioned to permit the processed products to fall out of the vessel.
20. The method of claim 1 wherein the step of depressurizing the vessel includes the step of recovering any steam remaining in the vessel.
21. The method of claim 1 wherein the step of recovering steam further includes the steps of condensing the steam and treating any condensable pollutants to render them harmless.
22. The method of claim 1 wherein the step of recovering the steam includes the step of recycling the steam.
23. The method of claim 1 wherein the step of depressurizing the vessel includes the steps of cooling and drying the processed products, and capturing any volatile organic compounds or any other air pollutants remaining in the vessel.
24. The method of claim 23 wherein the step of capturing volatile organic compounds and other air pollutants further includes the step of treating the volatile organic compounds and other air pollutants to render the volatile organic compounds and other air pollutants harmless.
25. The method of claim 23 wherein the step of cooling and drying further includes an evacuation step.
26. The method of claim 1 wherein said processed products are transported for use as a fuel or fertilizer.
27. The method of claim 1 wherein said diverse pulp and paper products are derived form waste paper, MSW, or biohazardous waste including medical and laboratory waste.
28. A method for treating biohazardous materials derived from laboratory and medical wastes containing diverse pulp and paper products to produce a sterile homogenous cellulosic product comprising the steps of:
(a) feeding biohazardous materials into a vessel;
(b) sealing the vessel so that the vessel is pressure tight;
(c) injecting steam into the vessel while agitating the materials;
(d) saturating the materials with steam at a temperature in the range of about 140°C to about 160°C and at a pressure in the range of about 275 kPa to about 450 kPa to expand the physical and chemical structure of the materials;
(e) depressurizing the vessel to further enhance the physical and chemical expansion of the materials;
(f) capturing any gases released during said depressurizing and treating said gases to render any volatile organic compounds and any other air pollutants present in the gases harmless; and (g) discharging the processed products from the vessel.
(a) feeding biohazardous materials into a vessel;
(b) sealing the vessel so that the vessel is pressure tight;
(c) injecting steam into the vessel while agitating the materials;
(d) saturating the materials with steam at a temperature in the range of about 140°C to about 160°C and at a pressure in the range of about 275 kPa to about 450 kPa to expand the physical and chemical structure of the materials;
(e) depressurizing the vessel to further enhance the physical and chemical expansion of the materials;
(f) capturing any gases released during said depressurizing and treating said gases to render any volatile organic compounds and any other air pollutants present in the gases harmless; and (g) discharging the processed products from the vessel.
29 29. The method of claim 28 wherein the method further includes the step of classifying cellulosic components of the processed products from other components.
30. The method of claim 29 wherein the step of classifying includes the step of separating the cellulosic components based on particle size.
31. The method of claim 29 wherein the step of classifying includes the step of separating the cellulosic components based on density.
32. The method of claim 29 wherein the step of classifying includes the step of separating the cellulosic components based on both particle size and density.
33. The method of claim 28 wherein the method further includes the steps of separating larger size components of the processed products and recycling the larger size components through the vessel for more processing.
34. The method of claim 28 wherein the pulp and paper materials have a moisture content of about 20% to about 60% by weight prior to the step of introducing steam.
35. The method of claim 28 wherein the temperature and pressure are maintained for a time sufficient for the products to be uniformly mixed and transformed into the homogenous cellulosic feedstock.
36. The method of claim 35 wherein the time is in the range of about 30 to about 60 minutes.
37. The method of claim 28 wherein the vessel includes a common opening serving as an inlet and outlet and the steps of feeding the diverse pulp and paper materials into the vessel and discharging the diverse pulp and paper materials from the vessel are both accomplished through the common opening.
38. The method of claim 37 wherein the vessel includes two or more internally mounted helical flights, the rotation of which agitates the pulp and paper products.
39. The method of claim 38 wherein the rotation of the helical flights in one direction causes the products to move away from the common opening.
40. The method of claim 38 wherein the rotation of the helical flights in a second direction causes the products to move toward the common opening.
41. The method of claim 38 wherein the vessel is capable of being tilted such that the common opening is positioned to not permit the products to fall out of the vessel.
42. The method of claim 38 wherein the vessel is capable of being tilted such that the common opening is positioned to permit the processed products to fall out of the vessel.
43. The method of claim 28 wherein the step of capturing volatile organic compounds and other air pollutants further includes the step of treating the volatile organic compounds and other air pollutants to render the volatile organic compounds and other air pollutants harmless.
44. The method of claim 43 wherein the capturing and treating any volatile organic compounds or any other air pollutants includes a thermal oxidizer.
45. The method of claim 43 wherein the capturing and treating any volatile organic compounds or any other air pollutants includes an absorbent filter
46. The method of claim 29 wherein the step of classifying cellulosic components of the processed products further includes a step of grinding to render any sharps harmless.
47. The method of claim 28 wherein said processed products are sterile.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2001/050049 WO2003035970A1 (en) | 2001-10-22 | 2001-10-22 | A method for preparing a homogenous cellulosic product from cellulosic waste materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2464090A1 true CA2464090A1 (en) | 2003-05-01 |
| CA2464090C CA2464090C (en) | 2010-06-15 |
Family
ID=21743161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2464090 Expired - Fee Related CA2464090C (en) | 2001-10-22 | 2001-10-22 | A method for preparing a homogenous cellulosic product from cellulosic waste materials |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1438459A1 (en) |
| JP (1) | JP4061268B2 (en) |
| KR (1) | KR100711659B1 (en) |
| CN (1) | CN100489191C (en) |
| AU (1) | AU2009200412A1 (en) |
| CA (1) | CA2464090C (en) |
| GB (1) | GB2392677B (en) |
| NZ (1) | NZ533075A (en) |
| WO (1) | WO2003035970A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8287651B2 (en) | 2008-09-17 | 2012-10-16 | Greenfield Ethanol Inc. | Cellulose pretreatment process |
| US8394235B2 (en) | 2009-01-16 | 2013-03-12 | Greenfield Ethanol Inc. | Removal of inhibitory compounds during pre-treatment of lignocellulosic biomass |
| US9150936B2 (en) | 2011-07-15 | 2015-10-06 | Greenfield Specialty Alcohols Inc. | Conditioning of biomass for improved C5/C6 sugar release prior to fermentation |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7967877B2 (en) | 2003-11-13 | 2011-06-28 | Biomass Worldwide Group Limited | Biomass energy product and processing method |
| WO2006015423A1 (en) * | 2004-08-11 | 2006-02-16 | Clifford C Holloway | Method and apparatus for collection and treatment of encapsulated waste |
| US8728802B2 (en) | 2006-02-15 | 2014-05-20 | Biomass Worldwide Group Limited | Angled reaction vessel |
| US7745208B2 (en) | 2006-02-15 | 2010-06-29 | Noll Anthony P | Angled reaction vessel |
| US7497392B2 (en) | 2006-07-17 | 2009-03-03 | Alliance Technology Group, Inc. | Process and apparatus for transforming waste materials into fuel |
| TW200918192A (en) * | 2007-01-05 | 2009-05-01 | Sterecycle Ltd | Process and apparatus for waste treatment |
| GB2463314A (en) * | 2008-09-11 | 2010-03-17 | Sterecycle Ltd | Process for municipal solid waste treatment |
| GB2472599A (en) * | 2009-08-11 | 2011-02-16 | Sterecycle Ltd | Thermal treatment of waste |
| JP2012149847A (en) * | 2011-01-20 | 2012-08-09 | Otake Kaihatsu:Kk | Far infrared-ray heating dryer with autoclave function |
| GB2489207B (en) | 2011-03-14 | 2014-02-26 | Zystur Ltd | Waste treatment |
| ITTO20111090A1 (en) * | 2011-11-28 | 2013-05-29 | Fater Spa | EQUIPMENT AND PROCEDURE FOR THE RECYCLING OF ABSORBENT SANITARY PRODUCTS |
| CN102615087B (en) * | 2012-03-15 | 2014-12-10 | 上海泰伍科新能源科技有限公司 | Method and equipment for obtaining high-quality solid fuel from solid wastes |
| WO2015054682A2 (en) | 2013-10-13 | 2015-04-16 | Cornerstone Resources, Llc | Methods and apparatus utilizing vacuum for breaking organic cell walls |
| EP2862688B1 (en) * | 2013-10-21 | 2016-07-20 | Re-Match (UK) Limited | Process for separating a synthetic turf product |
| US9353476B2 (en) * | 2014-04-18 | 2016-05-31 | Georgia-Pacific Containerboard Llc | Method for recycling waste material with reduced odor emission |
| GB201521624D0 (en) * | 2015-12-08 | 2016-01-20 | Fiberight Ltd | Waste processing |
| CN115055253A (en) * | 2022-03-25 | 2022-09-16 | 安徽农业大学 | Raw material pretreatment device and method for producing natural polysaccharide-based medical antibacterial hydrocolloid dressing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB809329A (en) * | 1954-04-14 | 1959-02-25 | Edward Joseph Poitras | Improvements in or relating to steam sterilization method and apparatus |
| US5217688A (en) * | 1991-01-25 | 1993-06-08 | Lersner Wolf A | Process for the disposal of medical waste |
| US5362443A (en) * | 1991-12-27 | 1994-11-08 | Nippon Metal Industry Co., Ltd. | Method and apparatus for disposal of medical waste |
| US5427650A (en) * | 1992-06-25 | 1995-06-27 | Holloway; Clifford C. | Apparatus and method for preparation for separation, recovery, and recycling of municipal solid waste and the like |
| US5445329A (en) | 1993-11-10 | 1995-08-29 | Anderson; Joseph | Apparatus, system for treating process material such as waste material |
| AU1357097A (en) * | 1996-02-27 | 1997-09-16 | Tetra Laval Holdings & Finance Sa | Process for sanitizing post-consumer paper fibers and product formed therefrom |
| JPH1147282A (en) * | 1997-07-31 | 1999-02-23 | Sharp Corp | Low frequency therapeutic apparatus |
| DE69909601T2 (en) * | 1998-03-18 | 2004-05-13 | Edmonton Biosphere Technologies Inc. | METHOD FOR BIOLOGICALLY REFINING ORGANIC WASTE TO OBTAIN DENATURED AND STERILE NUTRIENTS |
| US6458240B1 (en) * | 2000-01-14 | 2002-10-01 | Georgia-Pacific Corporation | Method for removing contaminants from fibers in recycle fiber pulping |
-
2001
- 2001-10-22 CN CNB018235174A patent/CN100489191C/en not_active Expired - Fee Related
- 2001-10-22 KR KR1020047005824A patent/KR100711659B1/en not_active IP Right Cessation
- 2001-10-22 GB GB0327498A patent/GB2392677B/en not_active Expired - Fee Related
- 2001-10-22 EP EP20010991520 patent/EP1438459A1/en not_active Withdrawn
- 2001-10-22 WO PCT/US2001/050049 patent/WO2003035970A1/en active IP Right Grant
- 2001-10-22 CA CA 2464090 patent/CA2464090C/en not_active Expired - Fee Related
- 2001-10-22 NZ NZ533075A patent/NZ533075A/en not_active IP Right Cessation
- 2001-10-22 JP JP2003538458A patent/JP4061268B2/en not_active Expired - Fee Related
-
2009
- 2009-02-04 AU AU2009200412A patent/AU2009200412A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8287651B2 (en) | 2008-09-17 | 2012-10-16 | Greenfield Ethanol Inc. | Cellulose pretreatment process |
| US8394235B2 (en) | 2009-01-16 | 2013-03-12 | Greenfield Ethanol Inc. | Removal of inhibitory compounds during pre-treatment of lignocellulosic biomass |
| US9150936B2 (en) | 2011-07-15 | 2015-10-06 | Greenfield Specialty Alcohols Inc. | Conditioning of biomass for improved C5/C6 sugar release prior to fermentation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2392677A (en) | 2004-03-10 |
| GB0327498D0 (en) | 2003-12-31 |
| JP2005506471A (en) | 2005-03-03 |
| KR20040045879A (en) | 2004-06-02 |
| JP4061268B2 (en) | 2008-03-12 |
| NZ533075A (en) | 2004-08-27 |
| CN100489191C (en) | 2009-05-20 |
| CA2464090C (en) | 2010-06-15 |
| GB2392677B (en) | 2004-12-01 |
| EP1438459A1 (en) | 2004-07-21 |
| CN1541291A (en) | 2004-10-27 |
| AU2009200412A1 (en) | 2009-03-05 |
| KR100711659B1 (en) | 2007-04-27 |
| WO2003035970A1 (en) | 2003-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20201022 |