Immobilization method for anaerobic fermentation bacterial active sludge

A technology of activated sludge and anaerobic fermentation, applied in fermentation, biological sludge treatment, immobilization on or in inorganic carriers, etc. Fermentation and COD removal characteristics, low production cost, simple and easy-to-use preparation method

Inactive Publication Date: 2008-12-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, the current research on the immobilization of activated sludge mainly focuses on the treatment of organic wastewater, and the research on immobilized activated sludge for anaerobic fermentation has not yet been seen in the existing research results at home and abroad.

Method used

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  • Immobilization method for anaerobic fermentation bacterial active sludge
  • Immobilization method for anaerobic fermentation bacterial active sludge
  • Immobilization method for anaerobic fermentation bacterial active sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Centrifuge the activated sludge in a centrifuge for 5 minutes at a speed of 30,000 r / min to obtain concentrated activated sludge.

[0025] Get 25 grams of the above concentrated activated sludge, then add 50 grams of solid carrier mycelium, the ratio of solid carrier to concentrated activated sludge mass is 2:1;

[0026] After the solid carrier mycelium is fully stirred and mixed with the concentrated activated sludge, the solid carrier that has absorbed the activated sludge is placed in a cross-linking agent with calcium chloride, and dried to obtain immobilized particles;

[0027] The prepared immobilized particles were cross-linked for 0.5 h, and then placed in a curing agent solution of ethylenediamine for 0.5 h to obtain immobilized activated sludge 1 .

[0028] Take 25 grams of starch-based catering organic waste, the water content is 65%, add 100g of immobilized activated sludge 1, add water to 800ml, add water to 800ml, control the temperature at 20 degrees Cels...

Embodiment 2

[0031] Example 2: Get 25 grams of cellulose-based catering organic waste, with a water content of 70%, add 100 g of immobilized activated sludge 2, add water to 800 ml, control the temperature at 37 degrees Celsius, and the fermentation cycle is 30 days. The average daily gas production is 360ml, the methane content is about 65%, the TS removal rate is 51.7%, the VS removal rate is 67.3%, and the COD removal rate is 85.6%.

Embodiment 3

[0032] Embodiment 3: Utilize immobilized activated sludge 3 to carry out anaerobic fermentation. Take 25 grams of oil-based catering organic waste, with a water content of 80%, add 100 g of immobilized activated sludge 3, add water to 800 ml, control the temperature at 55 degrees Celsius, and the fermentation period is 40 days. The average daily gas production during the fermentation process is 420ml, the methane content is about 61%, the TS removal rate is 60.1%, the VS removal rate is 66.4%, and the COD removal rate is 88.7%.

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Abstract

The invention provides an immobilization method for anaerobic fermentation strain activated sludge, and belongs to the anaerobic fermentation field. The prior activated sludge immobilization study mainly focuses on organic waste water treatment, while the activated sludge immobilization study on the anaerobic fermentation is not taken up. The method comprises the following steps of: taking concentrated activated sludge, and then adding a solid carrier into the sludge with a mass ratio of the solid carrier to the concentrated activated sludge being 1 to 0.5-10; fully mixing the solid carrier and the concentrated activated sludge, then putting the solid carrier absorbing the activated sludge in a cross-linking agent, and drying to produce immobilized particles; and carrying out cross linking of the produced immobilized particles for 0.5 to 8 hours, and then putting the immobilized particles after cross linking in a curative agent to carry out solidification for 0.5 to 10 hours. The obtained immobilized activated sludge can be widely applied to the anaerobic fermentation of catering organic wastes, straws, animal droppings on cultivation farms and other organic wastes for preparing the clean energy of methane.

Description

technical field [0001] The invention relates to a method for immobilizing activated sludge of anaerobic fermentation strains, in particular to a method for preparing activated sludge used for fermentation of catering organic waste to prepare methane. The obtained immobilized activated sludge can be widely used in the anaerobic fermentation of catering organic waste, straw, farm animal manure and other organic waste to produce clean energy methane. Background technique [0002] Immobilized activated sludge is one of the inoculum for biological treatment of solid organic waste and high-COD organic wastewater, which is currently the most actively researched. It has high concentration, small volume, high treatment load, low sludge output, high degradation efficiency, and With the characteristics of strong tolerance to toxic substances and good stability, it can be widely used in various anaerobic fermentations to produce methane. For example: Kang Ying proposed in "Environmenta...

Claims

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Application Information

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IPC IPC(8): C12N11/14C12N11/04C12P5/02C02F11/04
Inventor 苏海佳孙新升包美丹耿立媛
Owner BEIJING UNIV OF CHEM TECH
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