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A method for treating wastewater generated during the production of molecular sieve catalysts

A technology for producing waste water and production process, applied in natural water body treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., to achieve the effect of low investment, less bacterial agent dosage, and low operating cost

Active Publication Date: 2020-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN201210130658.5 discloses a method for denitrification of wastewater produced by catalytic cracking catalysts, using autotrophic bacteria and heterotrophic bacteria to make an advantageous combination as the enhanced microorganisms for wastewater treatment, and adopting different feeding methods, adding nitrifying bacteria and Denitrification denitrification bacterial agent, this invention can realize the removal of ammonia nitrogen and total nitrogen, but the total nitrogen in the wastewater is mainly inorganic nitrogen, and does not involve the treatment of wastewater containing toxic substances such as organic amines

Method used

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  • A method for treating wastewater generated during the production of molecular sieve catalysts
  • A method for treating wastewater generated during the production of molecular sieve catalysts
  • A method for treating wastewater generated during the production of molecular sieve catalysts

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Experimental program
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Effect test

Embodiment 1

[0036] Using the technological process of the present invention to treat the wastewater produced by a catalyst production enterprise in the molecular sieve modification process, the COD concentration is 25000-26000mg / L, the BOD concentration is 7000-7500mg / L, and the organic nitrogen concentration is 2000-2200mg / L , the concentration of ammonia nitrogen is 6000-6500mg / L, the pH value is 10-11, and the concentration of suspended matter is 3000-3500mg / L. The main test device configuration, operating conditions and treatment effects of each treatment unit are shown in Table 3.

[0037] Table 3 Main processing unit composition and processing effect of embodiment 1

[0038]

[0039] As can be seen from Table 3, after being treated by the method of the present invention, the effluent COD concentration is less than 70mg / L, the organic nitrogen concentration is less than 10mg / L, the ammonia nitrogen concentration is less than 20mg / L, and the total nitrogen concentration is less tha...

Embodiment 2

[0041] The process flow of the present invention is used to treat the wastewater produced by a catalyst production enterprise in the molecular sieve modification process. The COD concentration is 28000-29000mg / L, the BOD concentration is 5000-6000mg / L, and the organic nitrogen concentration is 2000-2500mg / L. , the concentration of ammonia nitrogen is 2500-3000mg / L, the pH value is 10-11.6, and the concentration of suspended matter is 3000-4000mg / L. The main test device configuration, operating conditions and treatment effects of each treatment unit are shown in Table 4.

[0042] Table 4 Main processing unit composition and processing effect of embodiment 2

[0043]

[0044] As can be seen from Table 4, after being treated by the method of the present invention, the effluent COD concentration is less than 80mg / L, the organic nitrogen concentration is less than 15mg / L, the ammonia nitrogen concentration is less than 20mg / L, and the total nitrogen concentration is less than 30...

Embodiment 3

[0046] Using the technological process of the present invention to treat the wastewater produced by a catalyst production enterprise in the molecular sieve modification process, the COD concentration is 35000-38000mg / L, the BOD concentration is 8000-9000mg / L, and the organic nitrogen concentration is 6000-7000mg / L , the concentration of ammonia nitrogen is 1000-1500mg / L, the pH value is 10-11, and the concentration of suspended matter is 4000-5000mg / L. The main test device configuration, operating conditions and treatment effects of each treatment unit are shown in Table 5.

[0047] Table 5 Main processing unit composition and processing effect of embodiment 3

[0048]

[0049] As can be seen from Table 5, after adopting the method of the present invention to process, effluent COD concentration is less than 80mg / L, and organic nitrogen concentration is less than 25mg / L, and ammonia nitrogen concentration is less than 20mg / L, and total nitrogen concentration is less than 30m...

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Abstract

The invention discloses a method for processing waste water generated during a molecular sieve catalyst production process. The method comprises the following steps: 1) pre-treating waste water; 2) mixing the pre-treated waste water and sanitary sewage and / or industrial wastewater; 3) performing anaerobic hydrolysis on the mixed waste water; 4) performing biological enhanced processing on the hydrolyzed waste water by a biological contact oxidation unit and a biological nitrogen removal unit, pouring a microbial growth promoter and a heterotrophic nitrification-aerobic denitrification microbial inoculum in the biological contact oxidation unit, and pouring a denitrification microbial inoculum in the biological nitrogen removal unit. wherein the growth promoter comprises metal salt, a polyamines substance and organic acid hydroxylamine, wherein the metal salt is 40-100 weight parts, the polyamines substance is 5-30 weight parts, and the organic acid hydroxylamine is 0.5-15 weight parts; and the metal salt is composed of calcium salt, copper salt, magnesium salt and / or ferrous salt. The method can realize that the production waste water of the organic amine molecular sieve catalyst can be processed by reaching the standard, and has the advantages of safe and reliable technology, good processing effect, and low operation cost.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for treating wastewater generated during the production process of a molecular sieve catalyst, in particular to a biological treatment method for wastewater generated during the production process of a molecular sieve catalyst containing organic amines. Background technique [0002] Ammonium salts or ammonia water are used in the production of many oil refining catalysts and molecular sieves used to prepare catalysts. The wastewater generated during the synthesis of molecular sieves contains silicon-aluminum compounds, which are not biodegradable. Direct entry into the biochemical system will affect the treatment of conventional pollutants by microorganisms Effect. Some molecular sieves use organic amines as templates in the synthesis process, so the discharged catalyst wastewater contains a certain amount of organic amines in addition to silicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/34
Inventor 高会杰郭志华孙丹凤赵胜楠李宝忠
Owner CHINA PETROLEUM & CHEM CORP