Methyl naphthol wastewater treatment process

A technology for wastewater treatment and methylnaphthol, which is applied in the field of water treatment, can solve the problems of high cost, poor effect of methylnaphthol wastewater, and high cost, so as to reduce investment and operation costs, save biochemical treatment process, and simplify process The effect of the process

Inactive Publication Date: 2013-05-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Publication No. is CN1884123A, and the patent document titled "A kind of method for treating the waste water produced by methyl naphthol and reclaiming methyl naphthol and methyl naphthylamine" discloses a Utilize the adsorption tower that macroporous resin is housed to process methyl naphthol waste water and reclaim the method for methyl naphthol and methyl naphthylamine, its defect is: after adsorption resin regeneration, the effect of processing methyl naphthol waste water b

Method used

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  • Methyl naphthol wastewater treatment process
  • Methyl naphthol wastewater treatment process
  • Methyl naphthol wastewater treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The conditions for processing each component of methyl naphthol wastewater are as follows:

[0013]

[0014] Use sodium hydroxide or sulfuric acid to adjust the pH of the wastewater to 1, add PAC coagulant at a concentration of 80 mg / L, and when small flocs appear, add PAM coagulant with a concentration of 10 mg / L, and stir The speed is 60r / min, after stirring for 10min, let it settle for 20min, then filter, and then add the concentration of 0.1 g / LFe 2+ and 0.2 g / LH 2 o 2 Carry out deep oxidation treatment, the oxidation time is 120min. Analysis after treatment showed that the COD removal rate of methyl naphthol wastewater was 35.8%.

Embodiment 2

[0016] The conditions for processing each component of methyl naphthol wastewater are as follows:

[0017]

[0018] Use sodium hydroxide or sulfuric acid to adjust the pH of the wastewater to 3, add PAC coagulant at a concentration of 120 mg / L, and when small flocs appear, add PAM coagulant with a concentration of 20 mg / L, and stir The speed is 60r / min, after stirring for 20min, let it settle for 20min, then filter, and then add the concentration of 0.5 g / LFe 2+ and 0.4 g / LH 2 o 2 Carry out deep oxidation treatment, the oxidation time is 120min. Analysis after treatment showed that the COD removal rate of methyl naphthol wastewater was 65.3%.

Embodiment 3

[0020] The conditions for processing each component of methyl naphthol wastewater are as follows:

[0021]

[0022] Use sodium hydroxide or sulfuric acid to adjust the pH of the wastewater to 5, add PAC coagulant at a concentration of 140 mg / L, and when small flocs appear, add PAM coagulant with a concentration of 20 mg / L, and stir The speed is 60r / min, after stirring for 30min, let it settle for 20min, then filter, and then add the concentration of 1.0 g / LFe 2+ and 0.8 g / LH 2 o 2 Carry out deep oxidation treatment, the oxidation time is 120min. Analysis after treatment showed that the COD removal rate of methyl naphthol wastewater was 92.5%.

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Abstract

The invention discloses a methyl naphthol wastewater treatment method implemented by using a PAC/PAM composite coagulant and a Fenton reagent. The method comprises the following steps: firstly, carrying out pretreatment on methyl naphthol wastewater by using PAC/PAM, wherein the concentration of PAC is 80-160mg/L, the concentration of PAM is 10-40mg/L, the pH value of a solution is 1-9, the stirring speed is 60r/min, and the stirring time is 10-50min. When the concentration of PAC is 140mg/L, the concentration of PAM is 20mg/L, the pH value is 5, and the stirring time is 30min, the CODCr (chemical oxygen demand) of wastewater is reduced from 5665-4820mg/L to 2925-2688mg/L. When the concentration of Fe<2+> is 1.0g/L, the concentration of H2O2 is 0.8g/L, and the reaction time is 120min, the final removal rate of CODCr reaches to be 89.6-92.5%. According to the treatment method disclosed by the invention, simplicity is realized, the cost is low, and the treatment effect on wastewater which is high in organic pollutant content, deep in colority and poor in biodegradability is good.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a method for treating methyl naphthol wastewater by using a PAC / PAM composite coagulant in combination with a Fenton reagent. Background technique [0002] With the continuous development of my country's economy, the discharge of industrial wastewater is increasing, especially organic chemical wastewater with high concentration and refractory degradation. In order to ensure the standard discharge of this kind of wastewater, the research on its treatment technology has always been a hot and difficult issue in the field of environmental protection. High-concentration and refractory organic chemical wastewater has high content of organic pollutants, darker color, and poor biodegradability. It is one of the most difficult industrial wastewater and has caused serious pollution to the environment. At present, the treatment methods of high-concentration and refractory organic chemical wast...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/52C02F1/56C02F1/72C02F101/34
Inventor 李祥梅王利平倪可沈肖龙
Owner CHANGZHOU UNIV
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