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Treatment method of bamboo pretreatment wastewater

A treatment method and pretreatment technology, which is applied in filtration treatment, chemical instruments and methods, and wastewater treatment in processing processes, etc., can solve the problems of large acid consumption, negative impact of biochemical treatment, increased treatment costs, etc., and achieve the effect of reducing costs

Pending Publication Date: 2022-03-25
SICHUAN TECH & BUSINESS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the technical problems that the acid treatment of bamboo wastewater before biochemical treatment consumes a lot of acid, increases the treatment cost, and easily has a negative impact on subsequent biochemical treatment, the present invention provides a bamboo pretreatment Wastewater treatment methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A treatment method for bamboo pretreatment waste water, is characterized in that, comprises the following steps:

[0032] (1) Degrade the fat in the waste liquid:

[0033] Introduce bamboo pretreatment wastewater with a pH value of about 10.0 into the hydrolysis tank, add alkaline lipase in an amount of 1 mg / L, stir for 8 hours at a temperature of 40-45°C, and rotate at a speed of 100r / min;

[0034] (2) Cellulose, hemicellulose, pectin, etc. in the hydrolysis waste liquid:

[0035] Add 1 mg / L compound enzyme preparation to the lipase-treated bamboo pretreatment wastewater, and stir for 16 hours at a temperature of 30-42 °C and a rotation speed of 100 r / min to make the cellulose and hemifibers in the waste liquid Glucose, maltose are hydrolyzed into glucose, maltose, and pectin is hydrolyzed into galacturonic acid, and step (1) unprocessed complete fat is further degraded; By weight, described compound enzyme preparation comprises cellulase 20 parts, hemicellulase 40 pa...

Embodiment 2

[0041] A treatment method for bamboo pretreatment waste water, is characterized in that, comprises the following steps:

[0042] (1) Degrade the fat in the waste liquid:

[0043] Introduce bamboo pretreatment wastewater with a pH value of about 11.0 into the hydrolysis tank, add alkaline lipase in an amount of 2mg / L, stir for 8.5h at a temperature of 40-45°C, and rotate at a speed of 120r / min;

[0044] (2) Cellulose, hemicellulose, pectin, etc. in the hydrolysis waste liquid:

[0045]Add 2 mg / L compound enzyme preparation to the lipase-treated bamboo pretreatment wastewater, and stir for 20 hours at a temperature of 30-42 °C and a rotation speed of 120 r / min to make the cellulose and hemifibers in the waste liquid Glucose, maltose are hydrolyzed into glucose, maltose, and pectin is hydrolyzed into galacturonic acid, and step (1) unprocessed complete fat is further degraded; By weight, described compound enzyme preparation comprises cellulase 25 parts, hemicellulase 45 parts ...

Embodiment 3

[0051] A treatment method for bamboo pretreatment waste water, is characterized in that, comprises the following steps:

[0052] (1) Degrade the fat in the waste liquid:

[0053] Introduce bamboo pretreatment wastewater with a pH value of about 11.0 into the hydrolysis tank, add alkaline lipase in an amount of 3 mg / L, stir for 9 hours at a temperature of 45-50 ° C, and rotate at a speed of 150 r / min;

[0054] (2) Cellulose, hemicellulose, pectin, etc. in the hydrolysis waste liquid:

[0055] Add 3mg / L compound enzyme preparation to the lipase-treated bamboo pretreatment wastewater, and stir for 30 hours at a temperature of 30-42°C and a rotation speed of 150r / min to make the cellulose and hemifibers in the waste liquid Glucose, maltose are hydrolyzed into glucose, maltose, and pectin is hydrolyzed into galacturonic acid, and step (1) unprocessed complete fat is further degraded; By weight, described compound enzyme preparation comprises cellulase 30 parts, hemicellulase 50 pa...

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Abstract

The invention discloses a bamboo pretreatment wastewater treatment method, which comprises: 1, adding lipase into bamboo pretreatment wastewater, and stirring for 8-10 h at a temperature of 40-55 DEG C; step 2, continuing to add the compound enzyme preparation, and stirring for 16-48 hours at the temperature of 30-42 DEG C; step 3, putting the bamboo pretreatment wastewater treated in the step 2 into a fermentation container, adding fermentation microorganisms, controlling the temperature at 22-30 DEG C for fermentation, stirring once every 1-2 hours, detecting the pH value of the wastewater, stopping fermentation when the pH value is less than 6, and standing; and step 4, filtering the wastewater treated in the step 3, and separating flocculate and supernate. According to the method disclosed by the invention, the wastewater is naturally acidified and lignin is separated out under the condition of not additionally adding acid by utilizing the effects of self-degradation of cellulose and hemicellulose in the wastewater, biological enzyme hydrolysis and microbial fermentation acidification, so that not only is the wastewater treatment cost reduced, but also the negative effects of sulfate radicals, chloride ions and the like on subsequent anaerobic and aerobic processes are avoided.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for bamboo pretreatment wastewater. Background technique [0002] my country is the country with the richest bamboo resources in the world, accounting for about one-third of the total bamboo resources in the world, and they are widely distributed in Fujian, Sichuan, Guangxi, Guangdong, Hunan, Guizhou and Yunnan in China. There are more than 500 varieties of bamboo, and the planting area, storage and consumption rank first in the world. According to statistics, the existing bamboo forest area in the country is more than 4.2 million hectares, and the annual bamboo felling volume is more than 25 million tons. billion. [0003] Bamboo has a hard structure and dense texture. In order to meet the processing needs, alkaline cooking is usually used in production, that is, it is softened with caustic soda, soda ash, and lime solution. During ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F9/14C02F103/26
CPCC02F3/342C02F3/34C02F3/343C02F9/00C02F1/66C02F1/001C02F2103/26
Inventor 张玉红刘一山李桂芳刘连丽张俊苗
Owner SICHUAN TECH & BUSINESS COLLEGE
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