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Method and device for recycling protein wastewater

A protein wastewater and protein technology, applied in chemical instruments and methods, oil/oily substance/float removal devices, water/sewage treatment, etc., can solve the problems of waste of biological resources, low content of sericin, water pollution, etc. Achieve the effect of reducing the degree of membrane fouling, effectively removing salt, and operating safely and environmentally friendly

Pending Publication Date: 2020-08-21
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the removed sericin is discarded as waste liquid, which not only wastes a lot of biological resources, but also causes serious water pollution, so the recovery, development and utilization of sericin are urgent
Due to the large volume of sericin wastewater and complex components, the content of sericin is low, recovery is difficult and energy consumption is high by direct evaporation

Method used

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  • Method and device for recycling protein wastewater
  • Method and device for recycling protein wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) The sericin wastewater in the silk refining process is clarified with a 1 μm hollow fiber membrane, filtered and then concentrated;

[0076] (2) Continue to filter the permeate obtained in step (1) with a 20nm ceramic membrane, concentrate it by 20 times, and add washing water 3 times the volume of the concentrated solution for cleaning.

[0077] (3) After the diafiltration is completed, the washing filtrate and permeate in step (2) pass through an organic membrane with a molecular weight cut-off of 5000Da, concentrate to a material concentration of 13%, and add 3 times the volume of the concentrated solution to wash and wash.

[0078] (4) Dry the concentrate in step (3) to obtain the highest value small molecule protein.

[0079] In step (2), the concentrated solution is dried to obtain soluble protein.

Embodiment 2

[0081] (1) Sericin wastewater from the silk refining process is clarified with a 0.5 μm ceramic membrane, filtered and then concentrated;

[0082] (2) Continue to filter the permeate obtained in step (1) with a 4nm ceramic membrane, concentrate it by 25 times, and add washing water whose volume is 1 times that of the concentrated solution for cleaning.

[0083] (3) After the diafiltration is completed, the washing filtrate and permeate in step (2) pass through an ultrafiltration membrane with a molecular weight cut-off of 50,000 Da, concentrate to a material concentration of 15%, and add 1 times the volume of the concentrated solution to wash and wash.

[0084] (4) Dry the concentrate in step (3) to obtain the highest value small molecule protein.

[0085] In step (2), the concentrated solution is dried to obtain soluble protein.

Embodiment 3

[0087] (1) The sericin wastewater in the silk refining process is clarified with a 0.5 μm organic microfiltration membrane, and then concentrated after filtration;

[0088] (2) Continue to filter the permeate obtained in step (1) with a 12nm ceramic membrane, concentrate it by 23 times, and add washing water twice the volume of the concentrated solution for cleaning.

[0089] (3) After the diafiltration is completed, the washing filtrate and permeate in step (2) pass through an organic membrane with a molecular weight cut-off of 20,000 Da, concentrate to a material concentration of 14%, and add 2 times the volume of the concentrated solution to wash and wash.

[0090] (4) Dry the concentrate in step (3) to obtain the highest value small molecule protein.

[0091] In step (2), the concentrated solution is dried to obtain soluble protein.

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Abstract

The invention provides a method for recovering sericin from sericin wastewater. The method comprises the following steps: (1) clarifying sericin wastewater through a microfiltration membrane; (2) continuing to grade the penetrating fluid obtained in the step (1) by an ultrafiltration membrane; (3) after grading is finished, concentrating the penetrating fluid in the step (2) by an ultrafiltrationmembrane; and (4) drying the concentrated solution obtained in the step (3) to obtain sericin. The method is simple, high in desalination rate, safe, environmentally friendly and high in sericin recovery rate, protein can be recycled in a graded mode, and no chemical reagent is added.

Description

technical field [0001] The invention relates to a method and device for recycling protein waste water, and more particularly relates to a method for efficiently recovering sericin protein from sericin waste water, which belongs to the field of food and feed. Background technique [0002] Sericin is a natural polymer protein, accounting for about 20%-30% of the total silk protein. There are a large amount of sericin in silk reeling, dyeing, silk weaving, silk spinning and silk cotton processing. At present, the removed sericin is discarded as waste liquid, which not only wastes a lot of biological resources, but also causes serious water pollution, so the recovery, development and utilization of sericin are urgent. Due to the large volume of sericin wastewater and complex components, the content of sericin is low, recovery is difficult and energy consumption is high by direct evaporation. Contents of the invention [0003] The object of the present invention is to prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/12C02F1/444C02F1/40C02F1/38C02F3/00
Inventor 葛乃星赵士明朱传柳李新慧章小同杨文银秦泗光徐远征王道龙彭文博范克银党建兵
Owner JIANGSU JIUWU HITECH
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