Treatment method for hyperosmosis concentrated mash waste liquor

Abstract

The invention discloses a treatment method for hyperosmosis concentrated mash waste liquor. The treatment method comprises the steps of (1) concentration: concentrating molasses fermentation waste liquor, wherein one part of molasses fermentation waste liquor is used for alkaline hydrolysis dewatering and the other part is used for acidolysis dewatering; (2) alkaline hydrolysis dewatering: adding 10-35 percent of an alkaline hydrolysis agent into the concentrated liquor, performing low-speed stirring, adding 5-15 percent of a calcium magnesium phosphate fertilizer and 10-15 percent of a potash fertilizer and uniformly stirring to obtain an alkaline hydrolysis mixture; (3) acidolysis dewatering: adding 10-35 percent of an acidolysis agent into the concentrated liquor, and performing low-speed stirring to obtain an acidolysis mixture; (4) preparation of neutralizing mixture: mixing the alkaline hydrolysis mixture and the acidolysis mixture to generate acid-alkaline neutralization until the pH is 5-7; (5) drying: drying the neutralized mixture until the moisture content is less than or equal to 10 percent. By the adoption of an acidification-alkalization combined method, the concentrated hyperosmosis concentrated mash waste liquor is subjected to acid and alkaline humification respectively, so that a neutralizing agent which is added when acid and alkaline humifications are carried out separately is saved, and a dual-purpose effect is achieved.

Description

technical field [0001] The invention belongs to the field of industrial waste recovery and utilization, and relates to a treatment method for hyperosmotic concentrated mash waste liquid. Background technique [0002] Molasses is the residual syrup in the sugar making process, and the fermentation of molasses is actually a process of further biochemical degradation and transformation of organic matter. When domestic alcohol is produced with molasses as raw material, about 4 tons of molasses are consumed for every 1 ton of alcohol produced, and about 14 tons of waste liquid is discharged. The pH value of the waste liquid is generally 3.0-3.5, mainly containing carbohydrates (polysaccharides) and alcohols. The pH value of molasses yeast wastewater is generally 4.0-5.0, mainly containing residual sugar, nutrient salt, some yeast cells and pectin and other biodegradable macromolecular organic matter. In addition to a small amount of glutamic acid, the molasses monosodium glutama...

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Problems solved by technology

[0006] The purpose of the present invention is to aim at the incomplete harmlessness of molasses fermentation waste liquid used in fertilizer production in the prior art, the single humification acidification or alkalization process, resulting in poor humification effect and incomplete humification, Fertilizer containing molasses fermentation waste liquid causes secondary pollution to the soil during use, and the fertilizer has no effect on the growth of crops. A treatment method for high-osmosis concentrated mash waste liquid is provided. This method proposes to use acidification or alkalization for treatment The method of process integration, the molasses fermentation waste liquid concentrate is subjected to acid and alkali humification respectively, and then the two are moderately neutralized so that the humified fermentation waste liquid can be used to prepare a variety of organic / inorganic hybrid compound fertilizers

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