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Method of preparing biological flocculant from cornstalks

A technology of biological flocculants and corn stalks, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of high treatment cost, large waste water, serious environmental pollution, etc., and reduce process energy consumption and process Discharge of waste water, effect of increasing acidity

Inactive Publication Date: 2017-02-22
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional acid and alkali pretreatment process will produce a large amount of waste water, which faces the problems of serious environmental pollution and high treatment costs.

Method used

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  • Method of preparing biological flocculant from cornstalks
  • Method of preparing biological flocculant from cornstalks
  • Method of preparing biological flocculant from cornstalks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one: comprise the following steps:

[0040] S1. Preparation of raw materials: After the corn stalks are naturally air-dried, the air-dried corn stalks are crushed and sieved by a pulverizer, and the parts with a particle size of 35 mesh are screened out, put into a vacuum drying oven, and dried at a temperature of 100°C. The dried raw materials are stored in a desiccator for subsequent use;

[0041] S2, hydrothermal pretreatment:

[0042] S2.1: Take 20g of dried raw material and add it to 400mL of deionized water, then add the catalyst FeCl 31.0g and 20ml of high-temperature penetrant JFC-M solution with a concentration of 6mg / mL were mixed and added to the reaction kettle, and the reaction kettle was sealed;

[0043] S2.2: Stir with a magnetic stirrer, adjust the speed of the magnetic stirrer to 260r / min, start heating, when the temperature is 160°C, keep the constant temperature for 20min, and perform hydrothermal pretreatment;

[0044] S2.3: After the p...

Embodiment 2

[0065] 1. Raw material preparation and hydrothermal treatment process:

[0066] After the raw corn stalks are naturally air-dried, the air-dried corn stalks are crushed and sieved by a material grinder, and the parts with a particle size of 40 mesh are screened out, put into a vacuum drying oven, and dried at a temperature of 105°C. The raw materials are stored in a desiccator for future use.

[0067] The specific steps of hydrothermal pretreatment of corn stalks are as follows:

[0068] (1) The solid-to-liquid ratio used in the pretreatment experiment is 5% (wt), that is, take 21g dry corn stalk samples and 410mL deionized water, add catalyst FeCl 3 1.1g and high-temperature penetrant JFC-M solution 21ml (JFC-M solution with a concentration of 6mg / mL), mix and add to a 1000mL reaction kettle, and seal the reaction kettle;

[0069] (2) Turn on the total power supply, controller power supply, and display power supply of the experimental device in turn, set the pretreatment t...

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Abstract

The invention provides a method for preparing a biological flocculant from cornstalks. By the method, energy consumption and cost are lowered, and sewage discharge is reduced. The method includes the following steps: S1, smashing and screening the cornstalks, and drying the cornstalks for standby application; S2, after completion of pretreatment reaction, performing solid-liquid separation by a Buchner funnel to obtain a solid-phase material for later enzymolysis; S3, filtering enzymolysis liquid to obtain filter liquor for preparing the biological flocculant; S4, preparing flocculant fermentation liquid; S5, extracting and drying flocculant active ingredients to obtain a product. The method has the advantages that the water heat pretreatment technology is environment friendly, and economy, greening, cleanness and environment protection are realized; yield of glucose in the process of enzymolysis can be increased through enzymolysis; cost is saved, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a biological flocculant, in particular to a method for preparing the biological flocculant from corn stalks. Background technique [0002] With my country's emphasis on environmental protection and ecological environment, the flocculant products used for sewage treatment are increasing at a rate of 15-20% every year. However, the current market is mainly based on chemical flocculants, such as inorganic flocculant polyaluminum chloride, polyferric sulfate, etc., organic flocculant polyacrylamide and other products. However, these products are prone to toxic and side effects after treating sewage, such as: easily causing senile dementia, aquatic animal death, carcinogenic, teratogenic, mutagenic and other side effects to humans, and the sludge produced by precipitation will cause secondary pollution and other problems. Microbial flocculants are secondary metabolites with flocculation activity produced from microorganisms or thei...

Claims

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Application Information

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IPC IPC(8): C12P1/04C12R1/125
CPCC12P1/04
Inventor 田连生陈菲陈秀清
Owner YANGZHOU POLYTECHNIC INST
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