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Preparation method and use method of denitrification solid-state carbon source

A solid carbon source and denitrification technology, applied in the field of water treatment, can solve the problems of small number of microorganisms, poor impact resistance, low biofilm strength, etc., to achieve the effect of strengthening interception capacity, preventing floating, and increasing the speed of film formation

Active Publication Date: 2018-07-06
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of traditional solid carbon sources such as long film-hanging time, small number of microorganisms per unit volume, low biofilm strength, and poor impact resistance, a method for preparing and using a denitrifying solid carbon source is provided.

Method used

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  • Preparation method and use method of denitrification solid-state carbon source
  • Preparation method and use method of denitrification solid-state carbon source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put the PHBV powder into a beaker and heat it at 160~175°C for 5 minutes. After the PHBV is melted, add the reagent with a mass ratio of PHBV: sodium bicarbonate: anhydrous ferric chloride: anhydrous manganese chloride = 100:5:0.010:0.005 into the beaker, stir at 100rpm / min for 60s, and cool naturally. into filler;

[0032] (2) Take out the filler after cooling, put it into a mesh bag with a pore size of 1.0~2.0mm, put it into a container containing 1% β-glucan aqueous solution, and shake it on a table shaker for 30s; take out the filler bag Dry it, put it into the reactor, and the reactor filling rate is 50%;

[0033] (3) No organic carbon source is added to the prepared sewage. The prepared sewage and activated sludge are mixed at a volume ratio of 1:3; an additional stirring device is added to stir at 60rpm / min; the activated sludge comes from the anaerobic pool sludge of Taiyuan Sewage Treatment Plant;

[0034] (4) The material of the reactor is plexiglass, c...

Embodiment 2

[0038] (1) The mass ratio of PHBV: sodium bicarbonate: anhydrous ferric chloride: anhydrous manganese chloride = 100: 10: 0.020: 0.010 is used for modification.

[0039] (2) The shaking time is 15s, and the mixed water sample is continuously injected for 36 hours; the rest of the filler treatment, sewage preparation, reactor specifications, operating conditions, and test methods are the same as in Example 1.

[0040] (3) After 3 days, the nitrate nitrogen content in the effluent of the reactor can be stably reduced from 40mg / L to below 2.5mg / L, the DOC content is continuously maintained at 2.5-5.5mg / L, and the pH value varies between 6.71-7.33.

Embodiment 3

[0042] (1) The mass ratio of PHBV: sodium bicarbonate: anhydrous ferric chloride: anhydrous manganese chloride = 100: 10: 0.015: 0.070 is used for modification.

[0043] (2) The shaking time is 15s, and the mixed water sample is continuously injected for 36 hours; the rest of the filler treatment, sewage preparation, reactor specifications, operating conditions, and test methods are the same as in Example 1.

[0044] (3) After 3 days, the nitrate nitrogen content in the effluent of the reactor can be stably reduced from 40mg / L to below 2.0mg / L, the DOC content is maintained at 5.0~7.0mg / L, and the pH value varies between 6.95~7.25.

[0045] The measured data and results of the examples can all meet the ideal requirements. Reactor average NO 3 - -N removal rate is above 95%, the highest is 98%; DOC concentration will not affect effluent COD; pH value is in the range suitable for the growth of denitrifying bacteria; film formation speed is 1 day faster than that of PHBV raw mate...

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Abstract

The invention discloses a preparation method and a use method of denitrification solid-state carbon source, and belongs to the technical field of water treatment. The preparation method of the denitrification solid-state carbon source comprises the following steps: adding a certain proportion of sodium bicarbonate, hydrous ferric chloride and anhydrous manganese chloride in molten PHBV, cooling tomanufacture modified PHBV material, bagging the filler to perform oscillation pre-treatment in 1-6% beta-glucan aqueous solution, airing and then placing in a reactor to use; injecting a water sampleobtained by mixing prepared sewage and anaerobic sludge in the reactor, continuously running for 36-48 hours, continuously running by using the prepared sewage, wherein the effluent NO3--N concentration can be lower than 5mg / Lafter biofilm formation. The advantage of the preparation method is that the attachment space of the microorganism is greatly increased, the denitrification bacteria numberis improved; the reactor starting time is shortened, the material wettability is improved; the absorption on the nutrient substance by the microorganism is accelerated, the microorganism propagation is strengthened; the effluent nitrogen nitrate concentration is stable and can reach the sewage discharge requirement; the operation is simple and easy to control.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method and a use method of a denitrification solid carbon source. A modification of poly-3-hydroxybutyrate valeric acid copolyester (PHBV) by sodium bicarbonate, anhydrous ferric chloride, and anhydrous manganese chloride as a filler for a denitrification device and a specific use method. Background technique [0002] In recent years, due to the transformation of my country's economy and industry, a large amount of nitrogen-containing domestic sewage and agricultural sewage have been discharged into water bodies. The content of nitrate nitrogen in surface water systems and groundwater in some areas has risen sharply, which has become an area that needs to be developed in today's water treatment technology. [0003] At present, the main means of removing nitrate nitrogen in urban sewage treatment is to rely on denitrifying bacteria to convert nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 刘海龙冯凯
Owner SHANXI UNIV
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