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Cellulosic ethanol industrialized production system and method for co-production of fulvic acid

A technology of cellulosic ethanol and production system, which is applied in the fields of biofuel, application, organic fertilizer, etc. It can solve the problems of heavy pollution load of waste mash, incomplete purification of cellulose, and difficult processing, etc., so as to ensure sustainable circulation Effects of operation, reduction of sewage generation, and increase of ethanol concentration

Active Publication Date: 2021-05-28
白博 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] patent "A method of using lignocellulosic enzyme hydrolysis residue to prepare lignosulfonate (application number: CN201210011668.7)", using enzyme saccharification residue to produce yellow Humic acid, its limitations are: the pre-acid treatment retains almost all lignin, too many impurities in the enzymatic saccharification raw material, which affects the efficiency of enzymatic saccharification, and the heavy pollution load of waste mash is difficult to deal with, which belongs to "post-processing".
[0016] patent "method for making sodium lignin sulfonate by using corn cob acid hydrolysis slag alkali boiling black liquor (application number: CN201610797594.2)", the existing problem is, The residue after acid hydrolysis and saccharification is first boiled with alkali and then sulfonated. Sodium ions are not suitable for fulvic acid fertilizers, and are not compatible with fulvic acid produced by sulfonated cooking with ammonium method
The reason is that, from the point of view of local technology, there are mainly problems of incomplete cellulose purification, large pollution load of waste mash, large water volume, and difficult treatment; overall, it is the lack of scientific and effective integration of production systems
It shows that although there are various cellulosic ethanol production technologies, especially the pretreatment technology of fiber raw materials, they all have local feasibility in different degrees, but when it comes to the construction and operation of a complete project, the face of When operating a complete production system, each single technology often cannot play a technical support role for the entire project, and often makes people confused until it is impossible to integrate and coordinate sustainable operations

Method used

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  • Cellulosic ethanol industrialized production system and method for co-production of fulvic acid
  • Cellulosic ethanol industrialized production system and method for co-production of fulvic acid
  • Cellulosic ethanol industrialized production system and method for co-production of fulvic acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0226] The first step, pretreatment and material preparation: use wheat straw as raw material, adopt the alkaline imonium method to pulp and carry out cooking pretreatment to obtain slurry.

[0227] 5 kg was sampled, and the solid content was 23%, and the fiber components were 60% cellulose, 33.6% hemicellulose, and 6.4% lignin and ash.

[0228] The second step, enzymatic saccharification: Cellulase is Novozymes CTec2.0, the dosage is 8 mg enzyme protein / g dry basis material, 50 ℃, enzymatic saccharification for 36 hours to obtain 94.5 g / L glucose and 34.6 g / L wood sugar.

[0229] The third step, fermentation: fermented with original raw materials, without any dilution and drying. The fermentation method is simultaneous saccharification and glucose / xylose co-fermentation. 20% solid content, 5L fermenter, 30°C, 10% inoculum, the fermentation strain is Saccharomyces cerevisiae engineering bacteria.

[0230] Fermentation time: 96 hours, data is checked every 12 hours.

[0231...

Embodiment 2

[0254] The first step: pre-processing materials. Wheat straw is used as a raw material, firstly pulping by neutral imonium method is used for cooking pretreatment to obtain slurry a; and then acidifying treatment is performed on slurry a to obtain slurry b. The acidification treatment process is: 2% hydrochloric acid, 8% pulp concentration, cooking temperature 95-100°C, time 90min, washing three times, pH7.

[0255] Sampling pulp b5 kg, recorded solid content 35%, recorded fiber components: 64% cellulose, 18% hemicellulose, lignin and ash 18%.

[0256] The second step, enzymatic hydrolysis and saccharification: cellulase is Novozymes CTec2.0, the dosage is 4mg enzyme protein / g dry basis material, 50℃, enzymatic hydrolysis and saccharification for 36 hours to obtain 72.2g / L glucose and 19.0g / L wood sugar.

[0257] The third step, fermentation: fermented with original raw materials, without any dilution and drying. The fermentation method is simultaneous saccharification and ...

Embodiment 4

[0294] Pretreatment cooking purification unit water balance

[0295] (1) Process, see Figure 5 :

[0296] (2) Water balance of each node:

[0297] ①Steaming, liquid ratio 1:3~4;

[0298] ②Washing, washing and separation to obtain ③Fulvic acid dilute black liquor 7-12 tons / ton of fulvic acid, solid content 8-12%;

[0299] 4. Evaporate and concentrate to obtain 2 tons of thick black liquor of fulvic acid with a solid content of 40-60%, and

[0300] ⑥Distilled water 5-10 tons / ton of fulvic acid;

[0301] ⑥Distilled water is reused for ①cooking and ②washing, and the excess part—⑦discharge up to standard;

[0302] ⑤ 2 tons of fulvic acid concentrated black liquor were sprayed and dried to obtain ⑧ 1 ton of fulvic acid dry powder.

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Abstract

The invention relates to a cellulosic ethanol factory production system and method for co-production of fulvic acid, and provides a set of complete production technology integration route and technical specification for co-production of high-concentration ethanol from high-purity high-solid-content cellulose of fulvic acid and a way and method for meeting specification requirements aiming at difficulties and pain points in the prior art. Therefore, the technical system integration and coordinated operation of pretreatment and ethanol production are realized. Herein, an alkaline distilled water detoxification scheme is provided, wherein all waste mash sewage is transferred to a pretreatment unit for treatment, a balance point of waste mash reuse sewage quantity is found, and the total quantity of the sewage is controlled. As a result, the high-purity and high-solid-content purification fundamentally solves the front-end trouble and the process barrier in the production process of cellulosic ethanol, enzyme agents are saved, and the transfer treatment of the cellulosic ethanol crude distillation waste mash thoroughly solves the worries of the cellulosic ethanol, so that two major components, namely cellulose and non-cellulose components, in the fiber raw material are completely utilized .

Description

technical field [0001] The invention relates to the comprehensive utilization of crop straw resources and the fields of biochemical engineering, fermentation engineering and biomass energy, in particular to a cellulose ethanol factory production system and method for co-production of fulvic acid. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Current status and limitations of industrial technology: According to authoritative analysis, the current status of the industrialization of cellulosic ethanol is: the industrial technology demonstration of cellulosic ethanol, which has more resources and market potential than grain ethanol, has encountered major setbacks, and major ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C05F11/02C05G3/80
CPCC12P7/10C05F11/02C05G3/80C12P2201/00Y02E50/10
Inventor 白博白嘉妮王东刘玉芳史晓菲
Owner 白博
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