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Recycling method of lactic acid fermentation acid-containing wastewater

A technology of lactic acid fermentation and wastewater, applied in microorganism-based methods, fermentation, chemical instruments and methods, etc., can solve problems such as environmental pollution, waste of water resources, increase production costs of enterprises, etc., achieve important environmental benefits, improve recovery rate, The effect of saving process water consumption

Pending Publication Date: 2021-08-20
郑州运维生物技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the waste water is not treated properly, it will not only cause serious environmental pollution, but also cause a lot of waste of water resources and increase the production cost of enterprises.

Method used

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  • Recycling method of lactic acid fermentation acid-containing wastewater
  • Recycling method of lactic acid fermentation acid-containing wastewater

Examples

Experimental program
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Embodiment

[0022] like figure 1 As shown, 300kg of cornstarch, 637.5kg of lactic acid reverse osmosis wastewater, mixed uniformly in a slurry tank at 50°C, added calcium hydroxide to adjust the pH to 6.0, and added 150g of high temperature resistant α-amylase with an enzyme activity unit of 20000U / g. After the second injection liquefaction, the first injection temperature is 97°C, heat preservation for 60min, the second injection temperature is 110°C, high temperature is maintained for 5min, vacuum flash cooling to 95°C, cooling to 60°C, adding 1000000U / g glucoamylase 60g, using Adjust the pH to 4.8 with lactic acid, and after saccharification at 60°C for 60 hours, filter the sugar solution with a plate frame.

[0023] The sugar clear liquid does not add lactic acid reverse osmosis wastewater, the total sugar of the mixed liquid is 235g / L, add 0.2% ammonium sulfate, 0.05% yeast powder; sterilize at 115 degrees Celsius for 30 minutes, insert lactic acid bacteria for fermentation, and cult...

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Abstract

The invention discloses a recycling method of lactic acid fermentation acid-containing wastewater, which comprises the following steps: (1) uniformly mixing corn starch and reverse osmosis wastewater, and carrying out slurry mixing; (2) dissolving the prepared corn starch, performing enzymolysis twice, and performing plate frame filtration to obtain liquefied sugar clear liquid; (3) respectively supplementing the liquefied sugar clear liquid, ammonium sulfate, yeast powder and other nutrients to the reverse osmosis wastewater to adjust the concentration, continuously killing bacteria to obtain a microbial culture medium, and carrying out strain fermentation; (4) after fermentation, separating thalli out through solid-liquid separation, obtaining lactic acid through acidolysis, increasing the concentration of the lactic acid through concentration of an evaporator to generate a large amount of lactic acid-containing wastewater in the evaporation process; (5) neutralizing the lactic acid-containing wastewater through calcium hydroxide to produce calcium lactate, and enabling a calcium lactate solution to penetrate through a reverse osmosis membrane to obtain a calcium lactate concentrated solution and reverse osmosis wastewater; and returning the generated wastewater to the step (1) and the step (3), and circulating in this way. According to the method, the sewage treatment cost is relatively saved, the recovery rate of lactic acid is increased, and the method has important environmental benefits and economic benefits.

Description

technical field [0001] The invention relates to the field of lactic acid fermentation process, in particular to a method for recycling acid-containing waste water from lactic acid fermentation. [0002] technical background [0003] With the development of society, especially the advancement of science and technology, the rapid development of social productivity has been greatly promoted, and people's living standards have been greatly improved and improved; while people are enjoying the happiness brought by social progress, The living environment, especially whether the discharge of production and domestic sewage meets the standards and can be used reasonably has attracted more and more attention. [0004] Lactic acid is an important natural organic acid, its scientific name is 2-hydroxypropionic acid, and its relative molecular mass is 90.08. The lactic acid molecule contains a chiral carbon atom, so it has optical activity. There are two optically active configurations of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/56C07C51/43C07C59/08C02F9/14C12R1/07
CPCC12P7/56C07C51/43C02F9/00C02F1/66C02F3/342C02F1/441C02F1/048C02F2305/06C07C59/08
Inventor 张标吴健熊德彬王皓磊
Owner 郑州运维生物技术有限公司
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