Alcohol crossed circle manufacturing technique with potatoes as the main materials

Abstract

The invention relates to an alcohol dual manufacturing technique with tuber as the main material in the alcohol fermentation industry technique, which comprises the following steps: mixing starch and the last anaerobic fermentation digestive liquid; heating, liquefying and reducing the temperature by adding maxilase and mixing homogeneously; adding the last distillery slop; saccharifying by adding glucoamylase; reducing the temperature; inoculating the extended culture distillery yeast; culturing in the constant temperature; acquiring the product alcohol by distilling; using distillery slop as the water for the next saccharifying and adjusting acid; cooling the rest slop and inoculating the last activated sludge in order to produce methane with anaerobic fermentation; recovering the activated sludge and digestive liquid by separating anaerobic fermentation liquid; making the digestive liquid back to the proportioning procedure as the technology water; circulating sequentially. The invention only needs a step anaerobic fermentation of distillery slop, which reduces investment of accommodation area and capital assets, can circulate anaerobic fermentation digestive liquid, achieves zero discharge of the wastewater from fermentation, achieves the circulation of the water resource and reduces the cost of alcohol.

Description

technical field [0001] The invention relates to an alcohol double-circle production process using potatoes as the main raw material, and belongs to the technical field of fermented alcohol industry. Background technique [0002] Fermentation of starchy raw materials to produce alcohol is one of the main methods of alcohol production. In the traditional fermentation process of starchy raw materials to produce alcohol, starchy raw materials are crushed, mixed with water, liquefied and saccharified, and then inoculated with alcoholic yeast for fermentation (as introduced in the book "Alcohol Industry Handbook", edited by Zhang Kechang, etc., Light Industry Press ). The traditional fermentation production process averages 12 to 15 tons of waste mash per ton of alcohol, and the waste mash COD cr As high as 40,000-50,000 mg / L or more, it not only causes serious water pollution, but also causes a lot of waste of resources. [0003] The current treatment methods of alcohol produc...

AI Technical Summary

Problems solved by technology

The main problems of the method of producing biogas by anaerobic fermentation first and then aeration and aerobic treatment are that it occupies a large area and requires high investment; As high as about 20 yuan, the third is that the treatment of wastewater is difficult to complete, and the discharged wastewater COD cr Still around 500mg / L

There is also a process of using distillation waste liquid full-cycle batching, but because the distillation waste mash after alcohol fermentation contains a large amount of organic acids, the pH value is between 3.0 and 4.0, and the liquefaction enzyme cannot function normally when the starchy raw material is liquefied after batching. (The optimal pH value of liquefying enzyme is between 5.5 and 6.5), resulting in high cost, limited circulation batches, and still a large amount of high-concentration wastewater discharge. This method has not been used on an industrial production scale.

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