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Recycling method of condensed water

A technology of condensed water and exchange resin, applied in the direction of ion-exchanged water/sewage treatment, etc., can solve the problem that condensed water cannot be recycled directly, and achieve the effect of being conducive to recycling and reducing the cost of environmental protection treatment

Active Publication Date: 2012-05-16
安徽中粮生化燃料酒精有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the condensed water produced in the current fermentation process cannot be directly recycled, the present invention provides a condensed water reuse method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0013] According to a preferred embodiment of the present invention, the condensed water is the secondary steam condensed water obtained by evaporating the filtrate produced after the waste tank liquid in the tower kettle is press-filtered during the production of ethanol by the fermentation method.

[0014] According to the present invention, in the condensed water obtained by evaporating the filtrate produced in the fermentation process to produce ethanol, the content of acetate ions can be 200-600 mg / liter, and the content of lactate ions can be 300-700 mg / liter, The content of succinate ions may be 110-200 mg / liter.

[0015] According to the present invention, the conditions for contacting the condensed water with the anion exchange resin can include: the contact temperature can be 20-60°C, preferably 25-40°C; the weight ratio of the condensed water to the dry weight of the anion exchange resin is 1: 0.0036-0.0125 , preferably 1:0.0045-0.0075.

[0016] According to the pr...

Embodiment 1

[0034] This embodiment is used to illustrate the method for recycling condensed water provided by the present invention.

[0035] (1) Activation of resin and preparation of ion exchange resin bed

[0036] Soak 800 grams of macroporous acrylic series weakly basic anion-exchange dry resin (Jiangsu Su Qing Water Treatment Engineering Group Co., Ltd., resin grade D318 with 2L concentration of 4% by weight hydrochloric acid solution, weak base group exchange capacity greater than or equal to 6.5 mmoles per gram of dry resin), rinsed with deionized water to a pH between 4-6 after soaking for 4 hours. After contacting with 2L sodium hydroxide solution with a concentration of 5% by weight for 6 hours, rinse with water until the pH value of the eluent is between 7-9 to obtain an activated macroporous acrylic weakly basic anion exchange resin. With 25 grams of the activated macroporous acrylic series weakly basic anion exchange resin, it is packed into an ion exchange resin bed layer w...

Embodiment 2

[0050] This embodiment is used to illustrate the method for recycling condensed water provided by the present invention.

[0051] (1) Activation of resin and preparation of ion exchange resin bed

[0052] Be that the hydrochloric acid solution of 4% by weight soaks 800 grams of gel-type acrylic acid series weakly basic anion exchange dry resin (Jiangsu Suqing, resin grade 313, weak base group exchange capacity greater than or equal to 5.5 mmol / g dry with 2L concentration of hydrochloric acid solution of 4% by weight) Resin), rinse with deionized water after soaking for 4 hours until the pH value is between 4-6, and then contact with 2L of sodium hydroxide solution with a concentration of 5% by weight for 6 hours, rinse with water until the pH value of the eluent between 7 and 9, the activated gel type acrylic weakly basic anion exchange resin is obtained. Use 25 grams of the above-mentioned activated gel-type acrylic series weakly basic anion-exchange resin to fill an ion-exc...

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Abstract

The invention provides a recycling method of condensed water, wherein the condensed water is obtained after a fermentation liquid and / or a filtered liquid are / is subjected to distillation or evaporating concentration. The method is characterized by comprising the following steps: contacting the condensed water with anion exchange resin, wherein the contact condition ensures that the contents of acetate ions, lactate ions and succinate ions in the contacted condensed water are respectively less than or equal to 20mg / L; and utilizing the processed condensed water to prepare a fermentation stocksolution, where the processed condensed water can replace the existing water used for fermentation stock solution. By utilizing the method provided by the invention, the recycling of the condensed water can be successfully realized, the total quantity of water used in a fermentation process is reduced by 30%, and the environmentally-friendly processing load and the environmentally-friendly processing cost can be greatly reduced; and the method provided by the invention is beneficial to the recycling and efficient clean production of water resources.

Description

technical field [0001] The invention relates to a method for recycling condensed water. Background technique [0002] The fermentation process refers to the process of using the enzymes of cultured cells to convert substrates into various useful products. It is widely used in the preparation of fuel ethanol, food, medicine and various chemical raw materials. Specifically, the fermentation process includes cell culture, substrate conversion, and the separation and purification of products after substrate conversion in industrial production. The above process needs to involve the distillation and evaporation concentration of the fermentation broth or filtrate, etc. The condensed water obtained by the condensation of the steam generated by the concentration generally accounts for more than 60% of the total amount of fermentation water, and the condensed water generally contains HCO 3 - , CO 3 2- , SO 4 2- , Cl - 、PO 4 3- and other inorganic anions and Na + , Mg 2+ , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42
Inventor 周永生吴德旺周勇熊结青顾宗池杨冬
Owner 安徽中粮生化燃料酒精有限公司
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