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Membrane separation and yeast reuse technique for matured mash of molasses alcohol

A technology of molasses alcohol and mature mash, which is applied in the field of membrane separation of molasses alcohol mature mash, which can solve the problems of membrane separation of molasses alcohol mature mash and yeast reuse technology, etc., and achieve resource reuse, easy enlargement, and environmental reduction pollution effect

Inactive Publication Date: 2011-10-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are no relevant reports on membrane separation and yeast recycling technology of molasses alcohol mature mash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use a power pump (model: TP10-20, flow rate: 0~200L / h, maximum pressure: 0.1Mpa) to send 2.5L mature mash to a microfiltration membrane with a membrane pore size of 0.22μm (membrane layer) through a φ10×7mm medical silicone tube The material is polyvinylidene fluoride), the flow rate is 2.5m / s, the pressure is 0.05Mpa, the room temperature is 22oC, microfiltration is performed for 30min, and the obtained permeate is distilled. Alcohol loss before and after microfiltration was 2.02%, COD removal rate was 57.8%, the permeate after microfiltration was distilled, alcohol was distilled at 78oC, and the alcohol concentration reached 78.33g / L; Re-fermentation in molasses mash, GIPE of yeast before microfiltration of mature mash was 1.32, yeast mortality was 6.8%, GIPE of reused yeast decreased to 1.29, yeast mortality was 7.2%.

Embodiment 2

[0033] Use a power pump (model: TP10-20, flow rate: 0~200L / h, maximum pressure: 0.1Mpa) to send 2.5L mature mash to the ultrafiltration membrane (membrane layer) with a membrane pore size of 0.01μm through a φ10×7mm medical silicone tube The material is polyvinylidene fluoride), the flow rate is 2.0m / s, the pressure is 0.08Mpa, and the room temperature is 16oC. After ultrafiltration for 45min, the obtained permeate is distilled; the alcohol loss before and after microfiltration is 2.47%, and the COD removal rate is 59.3%. The filtered permeate is distilled, and the alcohol is distilled at 78oC, and the alcohol concentration reaches 74.81g / L; the treated concentrate containing alcoholic yeast is added to fresh molasses mash for further fermentation; acidification of yeast before microfiltration of mature mash The force GIPE was 1.32, and the yeast mortality rate was 6.8%. The GIPE of reused yeast was reduced to 1.24, and the yeast mortality rate was 7.6%.

Embodiment 3

[0035] The distillation waste liquid is further evaporated and concentrated, concentrated to 75oBx, the concentrated solution weighs 405.4g, and the concentration is 12.16g of industrial sulfuric acid of 98%, dehydrated and solidified for 45min, and calcium magnesium phosphate fertilizer (P 2 o 5 ≥18%) 12.16g, potassium chloride (K 2 (O≥60%) 144.14g was mixed and stirred to disperse, dried at 105oC and then cooled, and then 156.75g of urea was added in proportion to make an organic compound fertilizer product.

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Abstract

The invention relates to a membrane separation and yeast reuse technique for matured mash of molasses alcohol. The technique is characterized by transporting the matured mash to a filter membrane (microfiltration or ultrafiltration) through a pump, separating under the sterile and seal conditions, reusing a yeast concentrated liquid for fermentation, and redistilling a penetrating fluid; and concentrating distillate, and then adding organic matters so as to form an organic fertilizer. In the technique, the pore size of a microfiltration membrane is 0.02-10mu m, the flow speed is controlled to 0.5-5m / s, the pressure is 0.01-0.2Mpa, and the temperature is 0-50 DEG C; and the pore size of the ultrafiltration membrane is 0.001-0.02 mu m, the flow speed is controlled to 0.1-0.5m / s, the pressure is 0.1-0.5Mpa, and the temperature is 0-50 DEG C. The technique has the advantages that the yeast concentrated liquid is reused so that cyclic utilization of resources is achieved, thus the technique is economic and environmentally-friendly; the filtrated penetrating fluid is redistilled, the chemical oxygen demand (COD) removal rate is larger than 50%, and the loss of the alcohol is less than 2.5%; and the distillate is concentrated so as to prepare the organic fertilizer, thereby achieving the zero emission of the waste liquid.

Description

Technical field: [0001] The invention relates to the technical field of water treatment and sewage treatment for environmental protection, and in particular provides a membrane separation technology for molasses alcohol mature mash, and reuses the separated yeast for continuous fermentation. This technology is suitable for the treatment of molasses alcohol mature mash in sugar factory. Background technique: [0002] The traditional molasses alcohol production process uses molasses as a raw material, which is fermented with alcoholic yeast to become a mature mash, which is then distilled into crude wine through a crude distillation tower, and the remaining waste mash is called molasses alcohol waste liquid. [0003] A prominent feature of alcohol waste liquid is the high concentration of pollutants, COD Cr Up to 80,000~120,000 mg / L, BOD 5 Up to 40,000 to 60,000 mg / L, SS value is about 1163 mg / L, pH value is 3.5 to 4.5, solid content is as high as 10% to 12%, about 70% of th...

Claims

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Application Information

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IPC IPC(8): C02F9/02C05F5/00C12N1/18C02F1/44C02F1/04
CPCY02A40/20
Inventor 张鹏黄明静邱族周鑫陈畅陈毅明赵鹏凯
Owner BEIJING UNIV OF CHEM TECH
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