Treatment method for hyperosmosis concentrated mash waste liquor

A treatment method and a concentrated mash technology are applied in the treatment field of high-osmotic concentrated mash waste liquid, which can solve the problems of secondary soil pollution, incomplete humification, incomplete harmlessness, etc., and achieve improved sugar content and flavor. excellent effect

Active Publication Date: 2014-06-04
GUANGXI XINTIANDE ENERGY +1
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  • Abstract
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  • Claims
  • Application Information

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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

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  • Treatment method for hyperosmosis concentrated mash waste liquor

Examples

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Example Embodiment

[0025] Example 1:

[0026] The molasses fermentation waste liquid in this example comes from a large cassava alcohol fermentation production enterprise in Guangxi. The steps of harmless treatment are as follows:

[0027] 1) Concentration: heating and evaporating at 65°C to concentrate the molasses fermentation waste liquid to an organic content of 55%, and the concentrated liquid is obtained for cooling. After cooling, the concentrated liquid is divided into two parts for use, one for alkaline hydrolysis and dehydration, and one for acid Dehydration.

[0028] 2) Alkaline hydrolysis and dehydration: take part of the concentrated solution obtained in step 1), add 30% alkaline hydrolysis agent (lime, the content of CaCO3 in lime is ≥92%), and perform alkaline hydrolysis and dehydration for 30 min under low-speed stirring at 150 r / min. Add 10% calcium-magnesium phosphate fertilizer and 10% potash fertilizer and stir evenly to obtain the alkaline material.

[0029] 3) Acidolysis and dehy...

Example Embodiment

[0032] Example 2:

[0033] The molasses fermentation waste liquid in this example comes from a large cassava alcohol fermentation production enterprise in Guangxi. The steps of harmless treatment are as follows:

[0034] 1) Concentration: heating and evaporating at 85°C to concentrate the molasses fermentation waste liquid to 75% organic content, and the concentrated liquid is obtained for cooling. After cooling, the concentrated liquid is divided into two parts for use, one for alkaline hydrolysis and dehydration, and one for acid Dehydration.

[0035] 2) Alkaline hydrolysis and dehydration: take part of the concentrated solution obtained in step 1), add 35% alkaline hydrolysis agent (liquid ammonia), alkali hydrolysis and dehydration under low-speed stirring at 200 r / min for 25 minutes, and then add 13% calcium magnesium phosphate fertilizer, 15 % Potassium fertilizer is stirred evenly to obtain the alkaline material.

[0036] 3) Acid hydrolysis and dehydration: take part of the c...

Example Embodiment

[0039] Example 3:

[0040] The molasses fermentation waste liquid in this example comes from a large-scale cassava alcohol fermentation production enterprise in Guangxi. The steps of harmless treatment are as follows:

[0041] 1) Concentration: heating and evaporating at 50°C to concentrate the molasses fermentation waste liquid to 60% organic content, and the concentrated liquid is obtained for cooling. After cooling, the concentrated liquid is divided into two parts for use, one for alkaline hydrolysis and dehydration, and one for acid Dehydration.

[0042] 2) Alkaline hydrolysis and dehydration: take part of the concentrated solution obtained in step 1), add 25% alkaline hydrolysis agent (ammonium carbonate powder), alkaline hydrolysis and dehydration under low speed stirring at 150 r / min for 40 minutes, and then add 8% calcium magnesium phosphate fertilizer, 15% potash fertilizer is stirred evenly to obtain the alkaline material.

[0043] 3) Acid hydrolysis and dehydration: take...

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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...

Claims

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Application Information

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IPC IPC(8): C05F5/00
CPCY02A40/20
Inventor 徐大鹏冯英邓文生
Owner GUANGXI XINTIANDE ENERGY
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