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Method for recycling protein and lactose from milk product wastewater

A dairy waste water and protein technology, applied in the field of protein and lactose recovery, can solve pollution and other problems, achieve the effects of process stability, environmental protection, and easy industrial application

Inactive Publication Date: 2008-06-11
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This technology not only solves the pollution problem in the dairy industry, protects the environment, but also recovers the nutrients in the dairy wastewater, and also provides theoretical and technical support for promoting clean production in the dairy industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the method for reclaiming protein and lactose from dairy waste water, comprises the following steps:

[0018] (1) Dairy wastewater enters the microfilter through a low-pressure pump to remove suspended solids that are large in size and easy to block or damage the ultrafiltration membrane in the wastewater. The microfiltration membrane material of the microfilter is polyvinylidene fluoride or polytetrafluoroethylene , one of carbon microporous tubes and ceramic membrane microporous tubes. The internal pressure of the microfilter is 0.3MPa, the temperature is 25°C, the pH value is 7, and the SS of the filtrate is 0, which meets the water inlet standard of the ultrafiltration membrane.

[0019] (2) The filtrate that step (1) obtains enters the ultrafiltration system after being pressurized by a low-pressure pump, wherein the ultrafiltration membrane material of the ultrafiltration system is aromatic polyamide, and the structural form is a roll type, and the u...

Embodiment 2

[0021] Embodiment 2: the method for reclaiming protein and lactose from dairy waste water, comprises the following steps:

[0022] (1) Dairy wastewater enters the microfilter through a low-pressure pump to remove suspended solids that are large in size and easy to block or damage the ultrafiltration membrane in the wastewater. The microfiltration membrane material of the microfilter is polyvinylidene fluoride or polytetrafluoroethylene , one of carbon microporous tubes and ceramic membrane microporous tubes. The internal pressure of the microfilter is 0.2MPa, the temperature is 10°C, the pH value is 8, and the SS of the filtrate is 0, which meets the water inlet standard of the ultrafiltration membrane.

[0023] (2) The filtrate that step (1) obtains enters the ultrafiltration system after being pressurized by a low-pressure pump, wherein the ultrafiltration membrane material of the ultrafiltration system is aromatic polyamide, and the structural form is a roll type, and the u...

Embodiment 3

[0025] Embodiment 3: the method for reclaiming protein and lactose from dairy waste water, comprises the following steps:

[0026] (1) Dairy wastewater enters the microfilter through a low-pressure pump to remove suspended solids that are large in size and easy to block or damage the ultrafiltration membrane in the wastewater. The microfiltration membrane material of the microfilter is a ceramic membrane microporous tube, or polytetrafluoroethylene One of vinyl, polyvinylidene fluoride, and carbon microporous tubes. The internal pressure of the microfilter is 0.04MPa, the temperature is 35°C, the pH value is 10, and the SS of the filtrate is 0, which meets the water inlet standard of the ultrafiltration membrane.

[0027] (2) The filtrate obtained in step (1) enters the ultrafiltration membrane system after being pressurized by a low-pressure pump, wherein the ultrafiltration membrane material of the ultrafiltration treatment system is sulfonated polyethersulfone, and its stru...

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Abstract

The invention discloses a method for recovering protein and lactin from waste water of dairy product, which comprises (1), first removing the suspension in dairy product waste water to obtain a filtrate, (2), using a low-pressure pump to feed the filtrate into a ultra-filter system to recover protein in the waste water to obtain ultra-filter filtrate, (3), feeding the ultra-filter filtrate via a high-pressure pump into a nano-filtration system to cover lactin, while the nano-filtration permeate liquid reaches regenerated water quality standard. The invention has the advantages that the invention provides a technique for recovering protein and lactin from waste water of dairy product, and realizes the generation of dairy product waste water. The invention has simple process and easy operation, which is not affected by temperature and workshop time, with low operation cost and industrialization suitability. The invention can recover at least 98% protein and 100% lactin in dairy product waste water, which can regenerate dairy product waste water.

Description

Technical field: [0001] The invention relates to a method for recovering protein and lactose from dairy wastewater, in particular to a method for recovering protein and lactose from dairy wastewater by using ultrafiltration and nanofiltration technologies. Background technique: [0002] The dairy industry is a young industry in my country. It originated in the early 1950s. Although the foundation is weak and the starting point is low, it has developed rapidly. Especially since the reform and opening up, my country's dairy industry has entered an unprecedented glorious era, and a group of strong Powerful dairy groups, such as Shanghai Guangming, Inner Mongolia Yili, Beijing Sanyuan, Hebei Sanlu, Inner Mongolia Mengniu, and Heilongjiang Wandashan, have stepped into the fast lane of development and achieved remarkable results. Although the consumption of dairy products in my country has increased rapidly, the current per capita consumption in my country is only equivalent to 37%...

Claims

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Application Information

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IPC IPC(8): C07K1/34C07H3/04C07H1/06
CPCY02P20/131Y02P20/129
Inventor 张永锋吉仁塔布王海崔景东李利军
Owner INNER MONGOLIA UNIV OF TECH
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