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Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater

A technology of alkylbenzene sulfonate and production wastewater, applied in the field of water treatment, can solve problems such as unsatisfactory effect, and achieve the effects of easy automatic control, simple operation and low treatment cost

Inactive Publication Date: 2010-12-22
BEIJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Add PAC, PFS and other flocculants directly for coagulation treatment, the effect is not ideal

Method used

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  • Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater
  • Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater
  • Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0025] Specific implementation method: first adjust the pH value of the heavy alkylbenzene sulfonate wastewater treated by aeration and catalytic treatment to 2-4, adjust the current intensity of the regulated DC power supply to 2-10A, and process for 2-10min. For the iron plate. Let it settle for another half an hour, take the supernatant and adjust the pH to 7.5-9.5, then add microporous composite water treatment agent according to the mass ratio of 1-2g / L, stir for 2-3min, and take it out after standing for 1 hour. The COD value of the clear liquid was measured, and the microporous composite water treatment agent used was diatomite mixed with polyaluminum chloride (MDE1), ferrous sulfate heptahydrate (MDE2), aluminum sulfate octadecahydrate (MDE3), polyaluminum sulfate Iron (MDE4) is a water treatment agent compounded at a mass ratio of 3:1-6:1. Embodiment 1: Get 1L heavy alkylbenzene sulfonate wastewater through aeration catalytic oxidation and place in a beaker, adjust t...

Embodiment 2

[0029] Using the method of Example 1, the pH was adjusted to 2.5 by sodium hydroxide, the current intensity was adjusted to 2A, 4A, 6A, 8A, and 10A, respectively, and the electrochemical treatment was performed for 8 minutes. After standing for half an hour, 200 mL of the supernatant was taken, and the pH was adjusted by sodium hydroxide. Adjust the pH of the effluent to 8.0, and the dosage of the microporous composite water treatment agent is 1g / L. The microporous composite water treatment agent used is a compound of purified diatomite and polyaluminum chloride at a mass ratio of 5:1. After adding the water treatment agent, stir rapidly for 2-3min, let it settle for 1h, take the supernatant to measure the COD value, the experimental results are shown in Table 2 and figure 2 shown.

[0030] Table 2 The influence of electrochemical current intensity on COD removal rate

[0031]

Embodiment 3

[0033] Using the method of Example 1, adjust the pH to 2.5 by sodium hydroxide, adjust the current intensity to 10A respectively, perform electrochemical treatment for 3min, 4min, 6min, 8min, and 10min, leave to stand for half an hour and take 200mL of the supernatant, and pass the sodium hydroxide Adjust the pH of the effluent to 8.0, and the dosage of the microporous composite water treatment agent is 1g / L. The microporous composite water treatment agent used is a compound of purified diatomite and polyaluminum chloride at a mass ratio of 5:1. After adding the water treatment agent, stir rapidly for 2-3min, let it stand for 1h, take the supernatant to measure the COD value, the experimental results are shown in Table 3 and image 3 shown.

[0034]Table 3 The influence of electrochemical treatment time on COD removal rate

[0035]

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Abstract

The invention discloses an advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater, belonging to the technical field of water treatment and comprising the following steps: regulating the pH value of the HABS industrial wastewater to be 2-4 firstly, feeding the HABS industrial wastewater after pH value regulation in a container, and putting at least two polar plates in the container, wherein the two polar plates are respectively connected with the positive and negative poles of a DC regulated power supply; regulating the current intensity of the DC regulated power supply to 2-10A, and processing for 2-10min, wherein the used polar plates are iron polar plates; standing and settling for 30min, taking supernate, regulating the pH value of the supernate to be 7.5-9.5, pouring a composite water treatment agent based on the mass ratio of 1-2g / L, stirring, and standing and settling for 1h, wherein the composite water treatment agent is prepared by compounding diatomite with aluminum polychloride, ferrous sulphate heptahydrate, aluminum sulfate aluminium sulfate octadecahydrate or polymerized aluminium ferric sulfate based on the mass ratio of 3:1-6. the advanced treatment method in the invention lowers COD index, has simple operation and is easy to realize automatic control, and the generated sludge can be used as an auxiliary material for subgrade and brickmaking, and has relative low cost.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for advanced treatment of heavy alkylbenzene sulfonate production wastewater by combined use of electrochemistry (ECS) and a microporous composite water treatment agent. Background technique [0002] At present, many oilfields in my country have entered the late stage of conventional production. The primary oil recovery and secondary oil recovery technologies cannot meet the oil recovery conditions, and the oil recovery rate is low. However, the tertiary oil recovery technology can meet the oil recovery conditions and is an effective way to increase oil recovery. In tertiary oil recovery technology, the ASP flooding composed of alkali / surfactant / polymer is the main factor to enhance oil recovery. Surfactants play an extremely important role in ASP flooding, directly affecting the interfacial tension between the flooding system and crude oil and the flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/28C02F1/52
Inventor 杜玉成雷钟卜仓友颜晶冀亚利孙建国朱维南
Owner BEIJING UNIV OF TECH
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