Method for treating reverse osmosis concentrates of petrochemical wastewater

A technology of reverse osmosis concentrate and petrochemical wastewater, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of immature research on the standard treatment of reverse osmosis concentrate, and achieve the effect of simple method and good treatment effect

Active Publication Date: 2011-07-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] But so far, the research on the standard treatment of reverse osmosi

Method used

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  • Method for treating reverse osmosis concentrates of petrochemical wastewater
  • Method for treating reverse osmosis concentrates of petrochemical wastewater
  • Method for treating reverse osmosis concentrates of petrochemical wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1. Preparation and Application of Single Manganese Catalyst for Ozone Multiphase Catalytic Oxidation Treatment of Reverse Osmosis Concentrate

[0035] 1. Preparation of single manganese catalyst

[0036] Prepare a certain concentration of manganese nitrate solution, take 150 grams of alumina carrier (particle size 3 ~ 5mm) dry impregnation with the above solution, the impregnation solution is basically blotted; after standing for 12 hours to dry, then dry at 80 ° C for 12 hours, Then roasting at a certain temperature for 4 hours, the nitrates are decomposed into metal oxides, which are fixed on the carrier to make a finished solid catalyst, and the loading capacity of the prepared catalyst active component is 6%.

[0037] In this example, the catalysts were calcined at 300° C., 400° C., 450° C. and 500° C. to prepare finished single manganese catalysts at different calcination temperatures.

[0038] 2. Ozone multi-phase catalytic oxidation treatment method for ...

Embodiment 2

[0044] Example 2. Preparation and Application of Copper-Manganese Two-Component Catalyst for Ozone Multiphase Catalytic Oxidation Treatment of Reverse Osmosis Concentrate

[0045] Some copper components are infiltrated into the single Mn catalyst to prepare the copper-manganese two-component catalyst. According to the ratio of manganese and copper, prepare a mixed solution of manganese nitrate and copper nitrate with a certain concentration, take 150 grams of activated carbon carrier (particle size 3 ~ 5mm) and dry impregnate with the above solution, and the impregnating solution is basically blotted dry; after standing for 12 hours to dry, then After drying at 80°C for 12 hours, and then roasting at 450°C for 4 hours, the nitrates are decomposed into metal oxides and fixed on the carrier to make a finished solid catalyst. The prepared catalyst active component has a loading capacity of 6 %.

[0046] In this example, the prepared copper-manganese dual-component catalyst was u...

Embodiment 3

[0049] Example 3. Ozone multi-phase catalytic oxidation treatment of reverse osmosis concentrated solution under different initial pH conditions of water samples

[0050] Select the manganese-copper 3:1 (mass ratio) catalyst prepared in Example 2, abbreviated as ZYW-1. The initial pH value of the water sample was adjusted to 5, 7 and 11 with sodium hydroxide or sulfuric acid solution, respectively, and the reverse osmosis concentrated solution was treated with ozone multiphase catalytic oxidation. The results are shown in Table 3 and Figure 5 , Figure 6 . It can be seen that the initial pH value of the water sample has little difference in the degradation rate of COD under acidic and neutral conditions, although the degradation rate under alkaline conditions is slightly higher, but the difference is not significant (see Table 3, Figure 5 ). On ozone depletion, alkaline under O 3 The consumption is much greater than that of acidic and neutral lower O 3 consumption (see ...

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Abstract

The invention provides a method for treating reverse osmosis concentrates of petrochemical wastewater. The method comprises the following steps: in the presence of a supported metal oxide catalyst, feeding ozone into the reverse osmosis concentrates of the petrochemical wastewater to carry out oxidation reaction, wherein the dosage of ozone is 70-100g/m<3>; the hydraulic load of the catalyst bed is 2-5m3/m<3>.h; the empty tower retention time is 12-20 minutes; the effluent COD is reduced below 50mg/L; the catalyst is formed by using a carrier to support reactive metal oxides; the carrier is selected from activated aluminium oxide or activated carbon; and the reactive metal oxides derive from one or more of manganese nitrate and copper nitrate. By utilizing the complex phase catalytic oxidation method to treat the reverse osmosis concentrates of the petrochemical wastewater with ozone, the method is simple and practical, the cost is low, the method has better treatment effect and the effluent COD can meet the requirement of the emission index.

Description

technical field [0001] The invention relates to a method for treating petrochemical wastewater reverse osmosis concentrate, specifically refers to a method for treating the reverse osmosis concentrate produced by the refinery wastewater reverse osmosis treatment process in the field of petrochemical industry so that the concentration of pollutants meets the requirements of the discharge standard . Background technique [0002] The reverse osmosis process is more and more used in the advanced treatment and reuse of refining wastewater. During the reverse osmosis treatment process, about 30% of the treated concentrate will be produced. This type of reverse osmosis concentrate has special water quality characteristics. In addition to the high concentration of salt and hardness like the reverse osmosis concentrate of general seawater desalination, it also contains organic matter and ammonia nitrogen with complex composition and poor biodegradability. The general COD value is abo...

Claims

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Application Information

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IPC IPC(8): C02F1/78
Inventor 吕荣湖李建忠
Owner BC P INC CHINA NAT PETROLEUM CORP
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