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Pretreatment process for toluene-contained wastewater

A pretreatment, toluene-containing technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of high COD concentration, difficult treatment, complex organic components, etc. problem, to achieve good settlement effect and reduce the difficulty of treatment

Inactive Publication Date: 2015-11-18
NANTONG BAICHUAN NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These sewages contain a lot of refractory organic matter and biotoxic substances, the composition of the organic matter is complex, and the concentration of COD is high, so it is very difficult to treat.
Wastewater containing toluene is highly difficult to treat and cannot be directly treated by biological methods

Method used

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  • Pretreatment process for toluene-contained wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown, a kind of pretreatment process that contains toluene waste water, the concrete steps of this process are as follows:

[0023] The first step: use the sewage pump to transport 50t, COD20000g of toluene-containing wastewater to the regulating tank;

[0024] Step 2: Adjust the PH value to 3 according to the water volume of the adjustment pool and the measured COD, add 30 kg of graphite powder and scrap iron scraps with a ratio of 1:4, and use stirring to rotate slowly to make the reaction uniform. After 1.5 hours, stop stirring and let it rest Set 0.5h;

[0025] Step 3: Put the water in the adjustment pool after standing still into the catalytic oxidation reactor, add 1t30% H 2 o 2 Solution reaction for 1h;

[0026] Step 4: Send the water in the catalytic oxidation reactor to the neutralization sedimentation tank, add lye to neutralize to pH 8, Fe 3+ Form Fe(OH) 3 , Fe(OH) 3 It has a good flocculation effect, sedimentation, filtration, and th...

Embodiment 2

[0029] Such as figure 1 Shown, a kind of pretreatment process that contains toluene waste water, the concrete steps of this process are as follows:

[0030] The first step: use the sewage pump to transport 50t, COD30000 toluene-containing wastewater to the regulating tank;

[0031] Step 2: Adjust the PH value to 3 according to the water volume of the adjustment pool and the measured COD, add 30 kg of graphite powder and scrap iron scraps with a ratio of 2:7, and use stirring to rotate slowly to make the reaction uniform. After 1.5 hours, stop stirring and let it rest Set 0.5h;

[0032] Step 3: Put the water in the adjustment pool after standing still into the catalytic oxidation reactor, add 1.5t30% H 2 o 2 Solution reaction for 1h;

[0033] Step 4: Send the water in the catalytic oxidation reactor to the neutralization sedimentation tank, add lye to neutralize to pH 8, Fe 3+ Form Fe(OH) 3 , Fe(OH) 3 It has a good flocculation effect, sedimentation, filtration, and the ...

Embodiment 3

[0036] Such as figure 1 Shown, a kind of pretreatment process that contains toluene waste water, the concrete steps of this process are as follows:

[0037] The first step: use the sewage pump to transport 50t, COD25000 toluene-containing wastewater to the regulating tank;

[0038] Step 2: Adjust the pH value to 3.5 according to the water volume of the adjustment pool and the measured COD, add 30 kg of graphite powder and scrap iron scraps with a ratio of 4:15, and use stirring to rotate slowly to make the reaction uniform. After 1.5 hours, stop stirring and let it rest Set 0.5h;

[0039] Step 3: Put the water in the adjustment pool after standing still into the catalytic oxidation reactor, add 1.25t30% H 2 o 2 Solution reaction for 1h;

[0040] Step 4: Send the water in the catalytic oxidation reactor to the neutralization sedimentation tank, add lye to neutralize to pH 8, Fe 3+ Form Fe(OH) 3 , Fe(OH) 3 It has a good flocculation effect, sedimentation, filtration, and ...

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Abstract

The invention relates to pretreatment process for toluene-contained wastewater. The process comprises the following concrete steps: firstly, pouring the toluene-contained wastewater into a regulation pool, and adding certain amounts of graphite powder and waste scrap iron with a fixed proportion into the regulation pool; secondly, allowing the water after standing in the regulation pool to enter a catalytic oxidation reaction kettle, and adding H2O2 with a concentration of 30% into the reaction kettle; thirdly, allowing the water in the catalytic oxidation reaction kettle to enter a neutralization sedimentation pool, adding alkali liquid for neutralization, then carrying out sedimentation and filtration, and transporting sludge to a physicalized sludge concentration pool; and finally, discharging the precipitated water into a biochemical regulation pool for subsequent processing. The pretreatment process for the toluene-contained wastewater has the following advantages: the pretreatment process has low wastewater treatment difficulty and is favorable for postprocesssing of the wastewater.

Description

technical field [0001] The invention relates to industrial wastewater treatment technology, in particular to a pretreatment process for toluene-containing wastewater. Background technique [0002] With the development of the chemical industry, the wastewater produced in the chemical production process, especially the wastewater that is difficult to treat, has caused more and more pollution to the environment. These sewages contain a lot of refractory biodegradable organic matter and biotoxic substances. The composition of organic matter is complex, and the concentration of COD is high, which is very difficult to treat. Wastewater containing toluene is highly difficult to treat and cannot be directly treated by biological methods. At present, there are Fenton method, incineration method, activated sludge method, membrane treatment method, etc. for the treatment of difficult sewage. Sewage treatment method for chemical oxidation. For toluene-containing wastewater, it is mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/32
Inventor 郑铁江赵红伟蒋国强马阳升曹圣平孙百亚薛俞波陶植马俊华
Owner NANTONG BAICHUAN NEW MATERIAL CO LTD