SYSTEMS AND PROCESSES FOR CELLULOSIC ETHANOL PRODUCTION
First Claim
1. An integrated cellulosic ethanol and biodiesel production system comprising:
- a feed stage configured to receive a waste cellulose stream and an algae cellulose stream and to produce a raw cellulose stream;
a hydrolysis stage coupled with the feed stage and configured to hydrolyze the raw cellulose stream to produce a hydrolyzed cellulose stream;
a liquefaction stage coupled with the hydrolysis stage and configured to liquefy the hydrolyzed cellulose stream to produce a formed sugars stream and one or more liquefaction byproduct streams;
a fermentation stage coupled with the liquefaction stage and configured to react the formed sugars stream with a yeast feed in at least one fermenter to produce a raw ethanol stream;
a separation stage coupled with the fermentation stage and configured to separate ethanol from the raw ethanol stream and to produce a fuel ethanol stream;
an algae generation stage comprising at least one algae bioreactor and configured to react the one or more liquefaction byproduct streams with algae in the at least one algae bioreactor to produce an algae stream; and
a biodiesel production stage coupled with the algae generation stage and configured to produce a biodiesel stream and the algae cellulose stream.
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Abstract
A cellulosic ethanol production system. Implementations may include a feed stage that may produce a raw cellulose stream from a waste cellulose stream and an algae cellulose stream. A hydrolysis stage may produce a hydrolyzed cellulose stream. A liquefaction stage may produce a formed sugars stream and one or more liquefaction byproduct streams. A fermentation stage may react the formed sugars stream with a yeast feed in at least one fermenter to produce a raw ethanol stream. A separation stage may separate ethanol from the raw ethanol stream and to produce a fuel ethanol stream. An algae generation stage may include at least one algae bioreactor and may react the one or more liquefaction byproduct streams with algae in the at least one algae bioreactor to produce an algae stream. A biodiesel production stage may produce a biodiesel stream and the algae cellulose stream.
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Citations
12 Claims
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1. An integrated cellulosic ethanol and biodiesel production system comprising:
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a feed stage configured to receive a waste cellulose stream and an algae cellulose stream and to produce a raw cellulose stream; a hydrolysis stage coupled with the feed stage and configured to hydrolyze the raw cellulose stream to produce a hydrolyzed cellulose stream; a liquefaction stage coupled with the hydrolysis stage and configured to liquefy the hydrolyzed cellulose stream to produce a formed sugars stream and one or more liquefaction byproduct streams; a fermentation stage coupled with the liquefaction stage and configured to react the formed sugars stream with a yeast feed in at least one fermenter to produce a raw ethanol stream; a separation stage coupled with the fermentation stage and configured to separate ethanol from the raw ethanol stream and to produce a fuel ethanol stream; an algae generation stage comprising at least one algae bioreactor and configured to react the one or more liquefaction byproduct streams with algae in the at least one algae bioreactor to produce an algae stream; and a biodiesel production stage coupled with the algae generation stage and configured to produce a biodiesel stream and the algae cellulose stream. - View Dependent Claims (2, 3, 4, 5)
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6. An integrated cellulosic ethanol and biodiesel production system comprising:
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a feed stage comprising a feed operation, the feed operation comprising a grinding operation and a mixing operation, the grinding operation configured to produce a waste cellulose stream and the mixing operation configured to receive the waste cellulose stream and an algae cellulose stream and to produce a raw cellulose stream; a hydrolysis stage coupled with the feed stage comprising a hydrolysis operation, the hydrolysis operation configured to react the raw cellulose stream with one or more organisms comprised in one or more hydrolysis inputs to produce a hydrolyzed cellulose stream, a hydrolysis CO2 stream, and a hydrolysis ethanol stream; a liquefaction stage coupled with the hydrolysis stage and comprising a heated sugar formation operation, a organism separation operation, and a liquefaction operation, the heated sugar formation operation and liquefaction operation configured to liquefy the hydrolyzed cellulose stream to produce a sugars stream and the organism separation operation configured to produce a recycled organism stream; a sugars separation stage coupled with the liquefaction stage and comprising a sugar separation operation configured to produce a xylitol stream and a separated sugars stream from the sugars stream; a fermentation stage coupled with the sugars separation stage and comprising a fermentation operation, the fermentation operation configured to react the separated sugars stream with a yeast feed in at least one fermenter to produce a raw ethanol stream and a fermentation CO2 stream; a separation stage coupled with the fermentation stage and comprising a separation operation, the separation operation configured to separate ethanol from the raw ethanol stream to produce a fuel ethanol stream and a waste cellulose stream; an algae generation stage comprising an algae generation operation, the algae generation operation comprising at least one algae bioreactor, the algae generation operation configured to react the hydrolysis CO2 stream, the fermentation CO2 stream, an atmospheric CO2 stream, and the xylitol stream with algae in the at least one algae bioreactor to produce an algae stream; and a biodiesel production stage coupled with the algae generation stage, the biodiesel production stage comprising a biodiesel reaction operation and an algae drying operation, the biodiesel reaction operation configured to produce a biodiesel stream and an algae waste stream, and the algae drying operation configured to receive the algae waste stream and to produce the algae cellulose feed. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification