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Method for treating industrial waste water containing cadmium using waste beer yeast

A technology for beer waste yeast and industrial wastewater, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as secondary pollution, human health hazards, and high cost, and achieve Good for recovery, no environmental pollution, short adsorption time

Inactive Publication Date: 2007-01-24
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its compounds are also toxic substances, which will cause great harm to human health.
Traditional methods of treating cadmium-containing industrial wastewater, such as chemical precipitation, ion exchange, electrolysis, coagulation and redox, are not only costly, but also easily cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Using waste beer yeast to treat smelting industrial wastewater containing cadmium

[0020] The process of using waste beer yeast to treat smelting industrial wastewater containing cadmium is as follows:

[0021] (1) Dilution, impurity removal and separation: After centrifuging the Jilin×× Brewery by a yeast centrifuge, 1000mL of waste yeast mud with a water content of 80% is sent to the cleaning equipment, diluted with 5000mL of 5℃ cold water, and then stirred evenly, and then used 80 mesh Sieve to remove 80% of the impurities, and then use a 100 mesh sieve to remove all visible impurities, stand for 40 minutes to make it automatically precipitate, decanted the supernatant, and then separate with a centrifuge at 2000 rpm for 20 minutes to obtain a water content of 80 % Yeast emulsion.

[0022] (2) Alkaline treatment: After adding NaOH to the yeast emulsion to make the pH 11, keep it for 3 hours to obtain the alkali-treated yeast emulsion.

[0023] (3) Making beer...

Embodiment 2

[0032] Example 2: Treatment of electroplating industrial wastewater containing cadmium with waste beer yeast

[0033] The process of using waste beer yeast to treat electroplating industrial wastewater containing cadmium is as follows:

[0034] (1) Dilution, impurity removal and separation: After the Siping ×× Beer Group is filtered by a filter press, the 1000mL waste yeast mud with a water content of 90% is sent to the cleaning equipment, and 3000mL 6℃ cold water is added to dilute and stir evenly, and then use 80-mesh sieve removes 80% of impurities, and 100-mesh sieve is used to remove all visible impurities. After standing for 40 minutes, it will automatically precipitate. After decanting the supernatant, it is separated by a centrifuge at 2000 rpm for 20 minutes. Yeast emulsion with 80% water.

[0035] (2) Alkaline treatment: Add NaOH to the yeast emulsion to make the pH 9 and keep it for 4 hours to obtain the alkali-treated yeast emulsion.

[0036] (3) Making beer yeast bios...

Embodiment 3

[0045] Example 3: Treatment of chemical industrial wastewater containing cadmium with waste beer yeast

[0046] The process of using waste beer yeast to treat chemical industrial wastewater containing cadmium is as follows:

[0047] (1) Dilution, impurity removal and separation: Send 1000mL waste yeast mud with 95% water content after precipitation in the cone-shaped fermentation tank of ××× Beer Co., Ltd. into the cleaning equipment, add 4500mL of cold water at 8°C to dilute and stir evenly, and then use 80 mesh Sieve to remove 80% of the impurities, and then use a 100 mesh sieve to remove all visible impurities, stand for 40 minutes to make it automatically precipitate, decanted the supernatant, and then separate with a centrifuge at 2000 rpm for 20 minutes to obtain a water content of 80 % Yeast emulsion.

[0048] (2) Alkaline treatment: After adding NaOH to the yeast emulsion to make the pH 10, keep it for 3.5 hours to obtain the alkali-treated yeast emulsion.

[0049] (3) Mak...

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Abstract

The method of treating industrial waste water containing cadmium with waste beer yeast includes treating waste yeast mud from brewery with alkali to obtain biological adsorbent of beer yeast, adding the biological adsorbent into industrial waste water containing cadmium for multiple stage of circular adsorption, adding fine husk powder via stirring and press filtering, incinerating the filter cake to obtain ash containing metal cadmium and recovering cadmium. The present invention has effective recovery of cadmium, simple technological process and no environmental pollution.

Description

Technical field [0001] The invention relates to a method for treating cadmium-containing industrial wastewater by using waste beer yeast. Background technique [0002] Waste beer yeast is the main by-product of beer production. If calculated based on the total beer output of 22.74 million tons in 2001, there will be 455,000 to 683,000 tons of waste beer yeast each year. But at present, most companies directly drain waste yeast and become a major source of pollution in water bodies. Only a small part of it is simply dried to produce yeast feed and sold at low prices. [0003] In addition, with the development of industry, cadmium and its compounds are widely used in electroplating, chemical, dye, textile, nuclear technology, oil refining and other industries. Among them, the cadmium content of wastewater in the electroplating industry is 40~250mg / L; the cadmium content of the waste water used to produce plastic stabilizers with cadmium sulfate as raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C12N1/16C22B17/00
Inventor 刘振扬郭葆华秦玉春孙志钢
Owner NORTHEAST DIANLI UNIVERSITY
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