Method for converting biomass to methane or ethanol
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C12P-007/10
출원번호
US-0136180
(2011-07-26)
등록번호
US-8877468
(2014-11-04)
발명자
/ 주소
Lewis, F. Michael
출원인 / 주소
Anaergia Inc.
대리인 / 주소
Pundsack, Scott
인용정보
피인용 횟수 :
3인용 특허 :
15
초록▼
A method for enhancing the treatment of lignocellulose-containing materials by biotreatment wherein such lignocellulose-containing materials, normally resistant to biotreatment, are first subjected to a low-temperature, long-residence time pyrolysis at about 175° C. to about 325° C. for about 0.1 ho
A method for enhancing the treatment of lignocellulose-containing materials by biotreatment wherein such lignocellulose-containing materials, normally resistant to biotreatment, are first subjected to a low-temperature, long-residence time pyrolysis at about 175° C. to about 325° C. for about 0.1 hour to about 2.0 hours, wherein a substantial portion of the incoming material is distilled into water-soluble compounds amenable to anaerobic biotreatment. Exemplary applications of the method include pyrolytic pre-treatment of wastewater sludges, cellulosic wastes, wood, peat, plant residues, low-grade coal, and the like to enhance methane gas production in anaerobic digestion and/or oxygen-limited or oxygen-starved fermentation to produce ethanol.
대표청구항▼
1. A method for converting biomass-based ligno-cellulosic materials in a biotreatment process to produce at least one of a methanaceous fuel gas and ethanol, comprising: subjecting said biomass-based ligno-cellulosic materials to pyrolysis to produce (a) a pyroligneous acid wherein a substantial por
1. A method for converting biomass-based ligno-cellulosic materials in a biotreatment process to produce at least one of a methanaceous fuel gas and ethanol, comprising: subjecting said biomass-based ligno-cellulosic materials to pyrolysis to produce (a) a pyroligneous acid wherein a substantial portion is comprised of wood alcohol and wood vinegar, (b) a pyrogas containing methane, carbon monoxide, hydrogen and water, and (c) pyrosolids including char, ash, and residual lignin-containing materials;separating pyrosolids from said pyroligneous acid, and pyrogas; andsubjecting said pyroligneous acid to an anaerobic biological treatment step to produce at least one of a methane-bearing biogas and ethanol. 2. A method in accordance with claim 1, wherein said pyrolysis is conducted at a temperature of between about 175° C. to about 325° C. 3. A method in accordance with claim 1, wherein said pyrolysis is conducted with a solids residence time of between about 0.1 hour and about 2 hours. 4. A method in accordance with claim 1, wherein said pyrolysis is conducted with a solids residence time of about 0.1 hour and about 0.5 hour. 5. A method in accordance with claim 1, wherein said anaerobic biological treatment step is conducted with methanogenic microorganisms. 6. A method in accordance with claim 1, wherein at least a portion of said separated pyrogas is introduced into said anaerobic biological treatment step. 7. A method in accordance with claim 1, wherein a major portion of said separated pyrogas is introduced into said anaerobic biological treatment step. 8. A method in accordance with claim 1, wherein said separated pyrosolids are used as an agronomic soil amendment. 9. A method in accordance with claim 1, wherein said anaerobic biological treatment step is conducted with ethanol-producing microorganisms. 10. A method in accordance with claim 9, wherein said microorganisms include yeast. 11. A method in accordance with claim 9, wherein said method further includes a step of removing toxic substances from said pyroligneous acid before introduction into said treatment step. 12. A method in accordance with claim 9, wherein said method includes a further step of adding at least one of a sugar and vitamins and minerals to said anaerobic biological treatment step. 13. A method for treating lignocellulose—containing material, comprising the steps of: introducing a first lignocellulose-containing material to an anaerobic biotreatment step in a digester wherein methanogenic microorganisms produce a methane-containing biogas and an aqueous stream containing residual biosolids;separating said biogas from said aqueous stream containing biosolids;dewatering said residual biosolids;subjecting said residual biosolids to pyrolysis to produce a pyrolysis product comprising a gas;mixing said gas into a stream drawn from said digester; and,recycling said stream back to said digester. 14. A claim in accordance with claim 13, wherein said pyrolysis is conducted at a temperature of about 175° C. to about 325° C. 15. A claim in accordance with claim 13, wherein said pyrolysis is conducted with a solids residence time of about 0.1 hour to about 2.0 hours. 16. A claim in accordance with claim 13, wherein said pyrolysis is conducted with a solids residence time of about 0.1 hour to about 0.5 hours.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (15)
Christian Robert F. (San Francisco CA) Barish Emil Z. (San Francisco CA) Mazur Mikhail D. (San Francisco CA) Almojuela Manuel M. (Daly City CA) Nicdao Noland F. (San Francisco CA), Apparatus for continuously mixing and electrically heating flowable materials conveyed by a pair of rotatable screws.
Torget Robert W. (Littleton CO) Kadam Kiran L. (Golden CO) Hsu Teh-An (Golden CO) Philippidis George P. (Highlands Ranch CO) Wyman Charles E. (Lakewood CO), Prehydrolysis of lignocellulose.
Scott Donald S. (Waterloo CAX) Piskorz Jan (Waterloo CAX) Radlein Desmond (Waterloo CAX) Majerski Piotr (Waterloo CAX), Process for the production of anhydrosugars from lignin and cellulose containing biomass by pyrolysis.
Scott Donald S. (Waterloo CAX) Piskorz Jan (Waterloo CAX) Radlein Desmond (Waterloo CAX) Majerski Piotr (Waterloo CAX), Process for the thermal conversion of biomass to liquids.
Peters,William A.; Howard,Jack B.; Modestino,Anthony J.; Vogel,Fredreric; Steffin,Carsten R., Thermal conversion of biomass to valuable fuels, chemical feedstocks and chemicals.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.