Tar-containing wastewater treatment method

A treatment method and technology for wastewater, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problem that ammonia nitrogen substances and phenolic substances are difficult to remove, cannot meet the requirements of national water quality standards, and the treatment effect of biochemical treatment system It can achieve the effect of high oil removal rate, convenient subsequent oil pollution separation, and good flocculation and bridging effect.

Inactive Publication Date: 2016-05-04
HANGZHOU FUYANG WEIWEN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the oil removal rate of these methods is only 20-30wt.%, still there is a large amount of tar substances in the water; Ammonia nitrogen substances and phenolic substances are difficult to remove, COD degradation in water is not complete, and cannot meet the requirements of national water quality standards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Treatment of a tar wastewater with a tar content of 750mg / L:

[0059] Step 1: Add the following mass fractions of substances to the tar wastewater:

[0060] Demulsifier 4

[0061] 4-(2,6,6-trimethyl-2-cyclooctene-1-yl)-3-butene-2-one 15

[0062] Hydroxypropyl bistrimethylammonium diiodide 8

[0063] Salicin 12

[0064] N-butyl lithium 2

[0065] After stirring for 45-55 minutes, let it stand for 60-90 minutes, the wastewater is divided into oil layer and water layer, and the oil layer and water layer are separated;

[0066] Among them, the ratio of the total mass of all the substances added in step 1 to the volume of the tar wastewater to be treated is 40 mg / L;

[0067] Step 2: Add substances with the following mass fractions to the oil layer obtained in Step 1:

[0068] Ammonium Citrate 5

[0069] Oleanal 3

[0070] Fatty alcohol polyoxyethylene ether 2

[0071] Polyoxypropylene glycol 10

[0072] After stirring for 45-75 minutes, let it stand for 60-90 minutes to obtain the treated orga...

Embodiment 2

[0085] Treatment of tar wastewater with a tar content of 858mg / L:

[0086] Step 1: Add the following mass fractions of substances to the tar wastewater:

[0087] Demulsifier 6

[0088] 4-(2,6,6-trimethyl-2-cycloocten-1-yl)-3-butene-2-one 18

[0089] Hydroxypropyl bistrimethylammonium diiodide 12

[0090] Salicin 13

[0091] After stirring for 45-55 minutes, let it stand for 60-90 minutes, the wastewater is divided into oil layer and water layer, and the oil layer and water layer are separated;

[0092] Among them, the ratio of the total mass of all the substances added in step 1 to the volume of the tar wastewater to be treated is 50 mg / L;

[0093] Step 2: Add substances with the following mass fractions to the oil layer obtained in Step 1:

[0094] N-butyl lithium 4

[0095] Ammonium Citrate 6

[0096] Oleanal 5

[0097] Fatty alcohol polyoxyethylene ether 3

[0098] Polyoxypropylene glycol 12

[0099] After stirring for 45-75 minutes, let it stand for 60-90 minutes to obtain the treated organi...

Embodiment 3

[0112] Treatment of tar wastewater with a tar content of 918mg / L:

[0113] Step 1: Add the following mass fractions of substances to the tar wastewater:

[0114] Demulsifier 8

[0115] 4-(2,6,6-trimethyl-2-cycloocten-1-yl)-3-butene-2-one 20

[0116] Hydroxypropyl bistrimethylammonium diiodide 20

[0117] Salicin 15

[0118] N-butyl lithium 5

[0119] After stirring for 45-55 minutes, let it stand for 60-90 minutes, the wastewater is divided into oil layer and water layer, and the oil layer and water layer are separated;

[0120] Among them, the ratio of the total mass of all the substances added in step 1 to the volume of the tar wastewater to be treated is 60 mg / L;

[0121] Step 2: Add substances with the following mass fractions to the oil layer obtained in Step 1:

[0122] Ammonium Citrate 8

[0123] Oleanal 6

[0124] Fatty alcohol polyoxyethylene ether 5

[0125] Polyoxypropylene glycol 15

[0126] After stirring for 45-75 minutes, let it stand for 60-90 minutes to obtain the treated organi...

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PUM

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Abstract

The invention relates to a tar-containing wastewater treatment method. The method comprises orderly adding a de-emulsifier, 4-(2, 6, 6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one, N, N-(2-hydroxytrimethylene)bis(trimethylammonium) diiodide, salicin, n-butyllithium, ammonium citrate, oleanic aldehyde, fatty alcohol-polyoxyethylene ether, polyoxypropylene diol, nanometer titanium dioxide, polycarboxylate, sodium alginate, sodium ethoxide and aluminum trichloride. The tar-containing wastewater treatment method synchronously realizes demulsification, flocculation, bridge formation and foaming, has a small use amount and a high oil removal rate and is especially suitable for high-concentration tar-containing sewage treatment.

Description

Technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a method for treating tar wastewater. Background technique [0002] Basic energy industries such as petroleum smelting and coal processing will produce a large amount of high-concentration tar wastewater. [0003] The quality of tar wastewater is complex. It not only contains high concentrations of ammonia nitrogen, cyanide, solid particles and other pollutants, but also contains phenol, indole, naphthalene, pyridine, quinoline and other polycyclic and fused-ring aromatic hydrocarbon organics, and alkane organics. It has high concentration of pollutants and high toxicity. It is a typical industrial wastewater that is difficult to treat. If the content of tar substances is too high, it will cause blockage of the ammonia distillation tower and dephenol tower, and affect the recovery of ammonia and phenol. Moreover, the ammonia nozzle of the coke oven will be blocked and t...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/40C02F103/34
CPCC02F1/40C02F1/5236C02F1/54C02F9/00C02F2101/16C02F2101/18C02F2101/32C02F2101/327C02F2101/345C02F2101/38C02F2103/34C02F2103/365C02F2301/08
Inventor 孙琴华
Owner HANGZHOU FUYANG WEIWEN ENVIRONMENTAL PROTECTION TECH CO LTD
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