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Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique

A diosgenin and technical treatment technology, applied in the field of wastewater treatment technology, can solve problems such as difficulty in reaching the first-level discharge standard, ineffective utilization of glucose and hydrochloric acid, etc., and achieve no secondary pollution, convenient operation, and running costs. low effect

Inactive Publication Date: 2004-09-15
TAIGU INVESTMENT WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings of the existing diosgenin wastewater biochemical treatment technology that it is difficult to meet the first-level discharge standard stipulated by the state, and the glucose and hydrochloric acid in the wastewater cannot be effectively utilized, and to provide a membrane integration technology for treating diosgenin wastewater And reclaim the method for glucose and hydrochloric acid

Method used

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  • Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique
  • Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique
  • Method for treating waste water of chinese yam saporin and recovering gluocose and hydrochloric acid by membrane integrating technique

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Effect test

Embodiment 1

[0035] As shown in Figure 1, the method for membrane integration technology to process dioscin waste water and reclaim glucose and hydrochloric acid is realized by the following steps: 1), pretreatment: 100L of dioscin waste water (hydrolyzate), COD105000mg / L, pH value 0.16 , temperature 36°C; filtered through an alumina microfiltration membrane with a pore size of 200nm, the filtration pressure is 0.41MPa, and the average flux is 197L / m 2 h, remove suspended solids or macromolecular impurities to obtain 93L of filtrate. 2), recovery of glucose and hydrochloric acid: deacidification with nanofiltration membrane, the average flux under the pressure of 1.8MPa is 6.5L / m 2 h, hydrochloric acid aqueous solution permeates the membrane to obtain hydrochloric acid, while the intercepted is glucose concentrate. 3) Advanced treatment: adding 40L of water to the concentrated nanofiltration solution to deacidify it, and the first-level advanced treatment after the permeate is neutralized...

Embodiment 2

[0038] The method for treating diosgenin wastewater by membrane integration technology and recovering glucose and hydrochloric acid is realized by the following steps: 1), pretreatment: 100L of diosgenin wastewater (hydrolyzate), COD96000mg / L, pH value 0.18, temperature 32°C; 100nm zirconia microfiltration membrane filtration, the filtration pressure is 0.41MPa, the average flux is 247L / m2h, and the suspended solids or macromolecular impurities are removed to obtain the filtrate. 2), recovery of glucose and hydrochloric acid: the filtrate is deacidified by nanofiltration membrane, the pressure is 1.8MPa, and the average flux is 6.0L / m 2 h; Hydrochloric acid aqueous solution permeates the membrane to obtain hydrochloric acid, and what is intercepted is glucose concentrate. 3) Advanced treatment: Add 80L of water to the concentrated solution to deacidify to obtain 35L of concentrated sugar solution. The first-level advanced treatment of the deacidified permeate is a nanofiltrati...

Embodiment 3

[0041] The method for treating diosgenin wastewater by membrane integration technology and recovering glucose and hydrochloric acid is realized by the following steps: 1), pretreatment: 100L of diosgenin wastewater (hydrolyzate), COD88000mg / L, pH value 0.21 temperature 34°C; Suction filtration to obtain the filtrate. 2), recovery of glucose and hydrochloric acid: the obtained filtrate is deacidified by nanofiltration membrane, and the average flux under the pressure of 1.8MPa is 11.8L / m 2 h; Hydrochloric acid aqueous solution permeates the membrane to obtain hydrochloric acid, and what is intercepted is glucose concentrate. 3) Advanced treatment: 36L of concentrated solution was obtained, 60L of water was added for further deacidification, the permeate was neutralized, and two-stage advanced treatment was carried out with a low-pressure reverse osmosis membrane, and the average flux under a pressure of 1.8MPa was 9.3L / m 2 h and 25.4L / m 2 h, effluent COD78mg / L.

[0042] The ...

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Abstract

The invention relates to a waste water treating technique to extract yam saponin by ginger or Rhizoma Dioscoreae Nipponicae. It is a method to treat yam saponin waste water by film integration technique and recover glucose and HCl, including the steps: 1) pretreating: prefiltering the yam soaponin waste water to eliminate suspended substance or macromolecular impurities and obtain filtrate; 2) recovering glucose and HCl: treating the filtrate by acidproof polyamide nano-filter membrane, where the HCl solution permeates the nano-filter membrane at 1.6-2.5 MPa and 20-40 deg.C to obtain HCl, but the glucose is withheld; the withheld glucose solution's concentration varies from 2-7% to above 10% by condensation, when the concentrated solution reaches below 40% of the charging capacity, it starts supplying water to the concentrated solution to eliminate the remanent acid, and keeps vaporizing and concentrating to make the glucose; 3) deep treating: the penetrant is neutralized to achieve the standard and be discharged.

Description

technical field [0001] The invention relates to a waste water treatment process for extracting diosgenin by using turmeric or diandilong. It specifically relates to the hydrolyzed raw liquid and washing liquid or their mixed liquid produced in the diosgenin extraction process, and recovers the glucose and hydrochloric acid therein. Background technique [0002] Dioscin wastewater is wastewater generated during the processing of turmeric or diosgenin to produce diosgenin, mainly from acid hydrolysis, filtration and washing of hydrolyzate. The content of diosgenin in dried turmeric is 1.8-3.2%, which also contains about 40% of cellulose and about 50% of starch; the content of diosgenin in fresh turmeric is 0.6-0.8%, which also contains about 20% of cellulose and The starch with more than 18% is usually hydrolyzed by adding 0.8-2N hydrochloric acid or sulfuric acid, and hydrolyzed at 115-125°C for 2-4 hours. Extraction of diosgenin with non-polar solvent. The filtrate produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07C07H1/06C07H3/02
Inventor 李华才谢雄梁震
Owner TAIGU INVESTMENT WUHAN
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