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Composite catalyst for aid-containing wastewater treatment

A composite catalyst and wastewater treatment technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, water/sewage treatment, etc., can solve the problems of large changes in pollutant concentration, avoid the loss of active metals, and stabilize catalyst performance. The effect of widening the operating temperature

Active Publication Date: 2019-10-08
宜兴国际环保城科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the performance of wet oxidation depends heavily on the catalytic performance of the catalyst. The auxiliary wastewater contains unique refractory substances, and the concentration of pollutants varies greatly. At present, there is no efficient catalyst for the treatment of auxiliary wastewater. Therefore, it is urgent to develop a catalyst for tubular free radical oxidation of waste water containing additives

Method used

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  • Composite catalyst for aid-containing wastewater treatment
  • Composite catalyst for aid-containing wastewater treatment
  • Composite catalyst for aid-containing wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of Catalyst A:

[0033] 1) claim that 261g ruthenium chloride trihydrate is dissolved in 10L deionized water to form solution A;

[0034] 2) Weigh 1Kg of coconut shell activated carbon, place it in a muffle furnace at 100°C for high temperature activation for a period of time, and cool to room temperature to obtain activated carrier B;

[0035] 3) Add 500g of activated carrier B to 2L of solution A and soak for 5 hours, and filter to obtain catalyst precursor C;

[0036] 4) Precursor C was dried at 80° C. for 5 hours, and then calcined at 800° C. for 8 hours to obtain catalyst A. According to detection and analysis, the loading amount of ruthenium was 0.21 wt%.

Embodiment 2

[0038] Preparation of Catalyst B:

[0039] 1) Weigh 250g of manganese nitrate and dissolve it in 5L of deionized water, then add 150mL of 30% hydrogen peroxide, and react at 30°C for 1 hour to obtain reaction solution A;

[0040] 2) Add 1Kg ZSM-5 molecular sieve to the reaction solution A and soak for 5 hours, filter and dry to obtain catalyst precursor A;

[0041] 3) Dissolve 26g of cobalt chloride and 272g of zinc chloride in 5L of deionized water to obtain solution B, place precursor A in solution B and immerse for 5 hours to obtain catalytic precursor B;

[0042] 4) Dry the catalyst precursor B at 80°C for 3 hours, then put it into a muffle furnace, and calcinate it at 600°C for 8 hours to obtain catalyst B. After detection and analysis, the content of the catalyst active component Mn is 1.12wt %, the content of Co is 0.12wt%, and the content of zinc is 2.08wt%.

Embodiment 3

[0044] The catalyst A1 prepared in Example 1 is mixed with the catalyst B1 prepared in Example 1 in a mass ratio of 1:10 composite catalyst D1.

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Abstract

The invention provides a composite catalyst for aid-containing wastewater treatment. The composite catalyst consists of a catalyst A and a catalyst B, wherein the catalyst A is a ruthenium-based catalyst and comprises a carrier and an active component ruthenium which is supported by the carrier; the carrier is selected from one or more of a molecular sieve, aluminum oxide, titanium oxide and activated carbon; the catalyst B is an Mn-Co-Zn catalyst and comprises a carrier and active components Mn, Co and Zn supported by the carrier; and the carrier is a molecular sieve. Through compounding of the catalyst A and the catalyst B, the range of working temperatures can be widened, the catalysis effect can be ensured when the composite catalyst is applied to aid wastewater with a large concentration fluctuation range, the CODcr removal rate is 95% or greater, and the BOD5 / CODcr is greater than 0.6 after treatment.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a composite catalyst for treatment of auxiliary-containing wastewater. Background technique [0002] Auxiliary wastewater is a kind of high-concentration refractory organic wastewater. High-concentration organic wastewater has the characteristics of high pollutant content, high toxicity, scattered discharge points, and low water volume. It will cause severe water pollution, deteriorate the ecological environment, and threaten human health. Physical treatment can be used as a pretreatment method for subsequent biochemical treatment to reduce suspended solids in water and reduce bioinhibitory substances in wastewater. The main components of wastewater are piperidone compounds, and the main characteristics of auxiliary wastewater are: high chroma, high COD, non-biochemical, and large changes in pollutant concentration. At present, the main treatment methods are incineration and phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J29/48C02F1/72C02F1/74C02F101/38
CPCB01J23/462B01J29/48C02F1/725C02F1/74B01J2229/186C02F2101/38C02F2209/08C02F2305/023B01J35/19
Inventor 周春松贾建洪余云丰
Owner 宜兴国际环保城科技发展有限公司
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