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Method for enhancing activity of anaerobic sludge by using rare earth

An anaerobic sludge and rare earth technology, which is applied in the field of utilizing rare earth to promote anaerobic sludge activity, can solve the problem that the application of rare earth element compounds has not been reported in literature and so on.

Inactive Publication Date: 2007-01-17
NANJING UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of rare earth element compounds in anaerobic reaction has not been reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At the initial stage of the operation of the anaerobic reactor, in the adjustment tank stage, according to the amount of mud in the reactor, according to 1.0μg La 3+ Adding lanthanum nitrate at the ratio of / gVSS, mixing evenly and entering the anaerobic reaction device for reaction, the methane-producing activity of the flocculent anaerobic sludge is increased by 5-8%, the sedimentation performance is improved, and it can adapt to the wastewater to be treated as soon as possible, thereby shortening the anaerobic reaction time. The start-up time of the oxygen reactor.

Embodiment 2

[0023] At the initial stage of anaerobic reactor operation, in the adjustment tank stage, according to the amount of mud in the reactor, 3.0μg Ce 3+ Add cerium chloride at the ratio of / gVSS, mix evenly and enter the anaerobic reaction device for reaction, so that the methane-producing activity of the flocculent anaerobic sludge can be increased by 5-10%, the sedimentation performance is improved, and it can adapt to the wastewater to be treated as soon as possible, thereby shortening the The start-up time of the anaerobic reactor.

Embodiment 3

[0025] After the granular sludge in the anaerobic reactor is impacted and acidified, according to the amount of sludge in the reactor, according to 5.0μgEu 3+ Add europium chloride at a ratio of / gVSS, mix evenly and enter the anaerobic reaction device for reaction, so that the maximum specific methane production activity of acidified anaerobic granular sludge is increased by 10-15%, and the total gas production is increased by 3-5%, so that Accelerated recovery of sludge methanogenic activity.

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Abstract

The present invention discloses method of utilizing RE to promote activity of anaerobic sludge. The method includes first calculating the amount of inorganic RE compound based on the sludge amount and the RE concentration of 1-5 microgram / g VSS sludge; adding the inorganic RE compound in the calculated amount into raw water; and making the raw water react in anaerobic reactor. Adding inorganic RE compound can promote the anaerobic reaction, and test results show that the RE concentration of 1-5 microgram / g VSS sludge can raise the specific methane generating activity of anaerobic granular sludge at medium temperature by 5-10 % and raise the specific methane generating activity of acidified sludge by 10-15 %. The method is simple and feasible and has wide industrial application foreground.

Description

1. Technical field [0001] The invention relates to an anaerobic sludge sewage treatment method, more specifically a method for promoting the activity of anaerobic sludge by using rare earth. 2. Background technology [0002] my country is extremely rich in rare earth resources. At present, rare earth inorganic compounds have been used as cofactors in agricultural fertilization and have been used in agriculture to effectively increase crop yields. The analysis of rare earth agricultural effects shows that the probability of increasing yield is about 90%, and the average increase in crop yield is 8-10% (Edited by Ni Jiazuan. Rare Earth Bioinorganic Chemistry. Beijing: Science Press, 1995). Studies on the effects of rare earth elements on soil microorganisms have shown that low concentrations of lanthanum can affect the utilization of soil microorganisms. 14 C glucose stimulates respiration, while high concentration of lanthanum inhibits it, and soil microbial biomass increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
Inventor 夏青任洪强王晓蓉
Owner NANJING UNIV
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