Process for treating yellow ginger saponin waste water by hydrochloric acid method

A technology for turmeric saponin and wastewater treatment, which is applied in water/sewage treatment, adsorbed water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as incompatibility, and achieve the effect of high removal rate and prolonged residence time

Inactive Publication Date: 2007-11-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

This method is aimed at the treatment of saponin wastewater produced by the sulfuric acid method. For the treatment of saponin wastewater produced by the hydrochloric acid method, because the saponin wastewater produced by the hydrochloric acid method contains high concentrations of chloride ions, this method is not suitable

Method used

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  • Process for treating yellow ginger saponin waste water by hydrochloric acid method
  • Process for treating yellow ginger saponin waste water by hydrochloric acid method
  • Process for treating yellow ginger saponin waste water by hydrochloric acid method

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Embodiment Construction

[0012] As shown in Figure 1, the technique of hydrochloric acid method turmeric saponin waste water treatment comprises the steps:

[0013] 1). The mixed waste water from the production of turmeric saponin by the hydrochloric acid method is first discharged into the water quality and quantity adjustment tank, and the residence time is 1-2 days; After 20% milk of lime, the pH value of the wastewater rises to 3.0-6.0, and the COD removal rate is 10-20%; 2). The effluent enters the electrolytic reactor in the aeration for pretreatment, and the electrolysis reaction in the aeration The device is filled with oxygen to remove part of COD and chroma, the removal rates are 10-30%, 20-40% respectively, and the pH value of the wastewater rises to 5.5-6.0; 3). After the wastewater is discharged from the internal electrolysis, it flows into the secondary Secondary pH value adjustment reaction sedimentation tank, adjust the pH value of waste water with CaO solution, make the pH value of wa...

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Abstract

A process for treating the sewage generated in extracting saponin from yam by hydrochloric acid method includes such steps as draining said sewage in quality and flow regulating pool, pumping it in pH regulating, reacting and depositing pool, flowing in aerating and electrolyzing reactor for pre-treating, flowing in another pH regulating, reacting and depositing pool, heating to 35-40 deg.C, anaerobic treating, inoculating Cl-resistant microbes, aerobic treating, inoculating Cl-resistant microbes, coagulating, depositing, oxidizing by ozone and adsorbing by activated carbon.

Description

technical field [0001] The invention relates to a process for treating turmeric saponin wastewater by hydrochloric acid method. Background technique [0002] Currently, the production of turmeric saponin mainly adopts acid hydrolysis process, including sulfuric acid method and hydrochloric acid method. Because the technological conditions of the sulfuric acid method are not easy to control, the quality of saponin products varies greatly, and the operation is dangerous, etc., the hydrochloric acid method occupies the main position. The biggest problem with the hydrochloric acid method is that the concentration of chloride ions in the wastewater is very high, and the acid hydrolysis stock solution and the Cl in the first washing water - The measured value of concentration can reach 20000-50000mg / L, Cl in mixed wastewater - The concentration reaches 10000-30000mg / L. Chloride ion is a nutrient element required for the growth and development of plants and microorganisms, but t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/66C02F1/461C02F1/72C02F3/30C02F1/52C02F1/28C02F1/78
Inventor 鲍建国王焰新刘慧包海峰李耀辰刘双王大玮信欣刘果张莉君
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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