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A method of treating sludge with red mud combined with rumen fluid to promote the production of short-chain fatty acids

A short-chain fatty acid and rumen fluid technology, which is applied in biological sludge treatment, metallurgical wastewater treatment, etc., can solve the problems of land occupation, environmental pollution, red mud cannot be fully and effectively used, etc., to promote the production of short-chain fatty acids, The effect of simple operation and easy control of hydrolysis and acidification conditions

Active Publication Date: 2019-07-26
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because red mud contains various impurities such as fluorine and aluminum, and a large amount of chemical alkali combined with it is difficult to remove, which makes it difficult for the harmless utilization of red mud
my country discharges millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized and can only be stacked in large-scale storage yards, which not only takes up a lot of land, but also causes serious pollution to the environment.

Method used

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  • A method of treating sludge with red mud combined with rumen fluid to promote the production of short-chain fatty acids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add the red mud to the sludge at a final concentration of 10g / L, mix well, put it into an anaerobic fermentation bottle, and use N 2 :CO 2 Purge the anaerobic fermentation bottle for 80:20 mixed gas for 0.5h, in which the liquid surface is purged for 15 minutes, and then the liquid surface is purged for 15 minutes to ensure that the reaction system reaches sufficient anaerobic conditions. Cover the silica gel cap and press it with a capper. Put it in a constant temperature incubator at 35°C for static anaerobic culture for 2 days; inoculate bovine rumen juice into the sludge anaerobic fermentation bottle after red mud pretreatment according to the volume ratio of bovine rumen liquid and sludge at 1:3 , the treatment temperature is 35°C, the stirring speed is 100r / min, and the airtight anaerobic fermentation is carried out for 3 days.

Embodiment 2

[0045] Add the red mud to the sludge at a final concentration of 20g / L, mix well, put it into an anaerobic fermentation bottle, and use N 2 :CO 2 Purge the anaerobic fermentation bottle for 80:20 mixed gas for 0.5h, in which the liquid surface is purged for 15 minutes, and then the liquid surface is purged for 15 minutes to ensure that the reaction system reaches sufficient anaerobic conditions. Cover the silica gel cap and press it with a capper. Put it in a constant temperature incubator at 35°C for static anaerobic culture for 2 days; inoculate bovine rumen juice into the sludge anaerobic fermentation bottle after red mud pretreatment according to the volume ratio of bovine rumen liquid and sludge at 1:3 , the treatment temperature is 35°C, the stirring speed is 100r / min, and the airtight anaerobic fermentation is carried out for 3 days.

Embodiment 3

[0047] Add the red mud to the sludge at a final concentration of 30g / L, mix well, put it into an anaerobic fermentation bottle, and use N 2 :CO 2Purge the anaerobic fermentation bottle for 80:20 mixed gas for 0.5h, in which the liquid surface is purged for 15 minutes, and then the liquid surface is purged for 15 minutes to ensure that the reaction system reaches sufficient anaerobic conditions. Cover the silica gel cap and press it with a capper. Put it in a constant temperature incubator at 35°C for static anaerobic culture for 2 days; inoculate bovine rumen juice into the sludge anaerobic fermentation bottle after red mud pretreatment according to the volume ratio of bovine rumen liquid and sludge at 1:3 , the treatment temperature is 35°C, the stirring speed is 100r / min, and the airtight anaerobic fermentation is carried out for 3 days.

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Abstract

The invention discloses a method for generating short-chain fatty acid by treating sludge through the combination of red mud and rumen fluid. According to the method, residual sludge is treated through the combination of the red mud and the rumen fluid so as to promote the generation of short-chain fatty acid. A new method for treating waste by waste and recycling the red mud, the sludge and the rumen fluid is provided. The method has the beneficial effects that the raw materials are easily available, the operation is simple, and hydrolytic acidification conditions are easily controlled; and the method has relatively high economic, social and environmental benefits and technical potential in large-scale industrial application.

Description

technical field [0001] The invention belongs to the field of comprehensive waste utilization, and more specifically relates to a method for treating sludge with red mud combined with rumen liquid to promote the production of short-chain fatty acids. Background technique [0002] With the popularization of sewage treatment plants, tens of millions of tons of surplus sludge are produced every year. Since the sludge contains a large amount of microorganisms and organic matter, if it is not treated in time, it will cause secondary pollution to the environment. However, the high water content of the sludge brings great difficulties to the treatment, and the treatment cost accounts for 20-50% of the total construction cost of the sewage treatment plant. Therefore, how to reasonably turn excess sludge into energy and resources is an urgent problem to be solved. [0003] One of the means of sludge resource utilization is anaerobic fermentation of sludge to produce short-chain fatty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04C02F103/16
CPCC02F11/04C02F2103/16
Inventor 叶捷任国平胡安东唐家桓周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV