Method for producing fuel ethanol from paper mill sludge

A papermaking sludge and fuel ethanol technology, applied in sludge treatment, biological sludge treatment, fermentation, etc., can solve the problems of resource waste, environmental pollution, etc., and achieve the effects of reducing pollution, saving equipment investment, and low sugar concentration

Inactive Publication Date: 2014-03-12
QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large amount of sludge produced by the paper industry is discarded or incinerated, which not only causes a waste of resources, but also causes serious environmental pollution problems.

Method used

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Embodiment 1

[0018] A method for producing fuel ethanol using papermaking sludge, which includes 1. Pretreatment of papermaking sludge: pulverizing papermaking sludge, neutralizing it with acid, and drying it; 2. Fermentation medium composition: peptone 5g / L, yeast powder 3g / L, wort juice 3g / L; 3. Fermentation: 50mL of fermentation medium prepared by phosphate buffered saline with pH 5.0 was placed in a 250mL Erlenmeyer flask, and 5.5g of treated papermaking waste was added. Slime, sterilized by high-pressure steam at 121°C for 20 minutes, cooled to room temperature, added 20FPU / g cellulase and 5% seed yeast, put a micro-aerobic rubber stopper on the bottle mouth, the shaking table speed was 100r / min, and the temperature was synchronized at 36°C Saccharification fermentation, non-ionic surfactant can be added during the fermentation process; 4. Post-treatment: 4000r / min centrifugal separation. The supernatant is fuel ethanol.

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Abstract

The invention discloses a method for producing fuel ethanol from paper mill sludge. The method comprises the following steps of 1, crushing paper mill sludge, neutralizing the crushed paper mill sludge by an acid and carrying out drying, 2, preparing a fermentation medium containing 5g / L of peptone, 3g / L of yeast powder and 3g / L of wort, 3, filling 50-60ml of the fermentation medium prepared from a phosphate buffer salt having a pH value of 5.0 into a 250mL of an erlenmeyer flask, adding 5-6g of the treated paper mill sludge into the erlenmeyer flask, carrying out high-pressure steam disinfection at a temperature of 121 DEG C for 20min, carrying out cooling to a room temperature, adding 20-25FPU / g of cellulase and 5-6% of a seed yeast into the fermentation medium, plugging the bottle opening by a microaerobic rubber plug, and carrying out constant-temperature synchronous saccharification fermentation at a shaking table rate of 100-150r / min at a temperature of 36DEG C, wherein in the fermentation, a nonionic surfactant can be used, and 4, carrying out centrifugation at a rotation rate of 4000-5000r / min. The method utilizes the synchronous saccharification fermentation process to produce fuel ethanol from paper mill sludge, changes wastes into valuables and reduces paper mill sludge-caused environmental pollution.

Description

technical field [0001] The invention relates to the field of chemical energy, in particular to a method for producing fuel ethanol by using papermaking sludge. Background technique [0002] Papermaking sludge is the solid residue produced in the pulp and papermaking process. With the continuous and rapid development of the paper industry, the amount and variety of new paper sludge generated every year is huge. At present, a large amount of sludge produced by the paper industry is discarded or incinerated, which not only causes a waste of resources, but also causes serious environmental pollution problems. Therefore, it is of great significance to study how to rationally use the effective components in sludge to produce high value-added products according to the characteristics of sludge, and to economically and effectively control the secondary pollution of sludge. [0003] Ethanol is the most promising liquid fuel from renewable resources, which is clean, safe and support...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08C12P19/14C02F11/02
CPCY02W10/20
Inventor 田英勇
Owner QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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