Process for catalytic oxidation-compound flocculation integrated treatment of comprehensive waste water

A catalytic oxidation and comprehensive wastewater technology, which is applied in the direction of oxidized water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low process integration, cumbersome operation, and complicated process , to achieve the effect of shortening the flocculation time, reducing the dosage and improving the flocculation effect

Inactive Publication Date: 2011-07-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Processes such as these have certain effects on wastewater treatment, but they all have more or less disadvantages such as complex process, cumbersome operation, and low process integration. Therefore, we have

Method used

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  • Process for catalytic oxidation-compound flocculation integrated treatment of comprehensive waste water

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Experimental program
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Effect test

Embodiment 1

[0029] ① Put the comprehensive chemical wastewater with a pH value of 6.8, a turbidity of 95 NTU, a chromaticity of 1700, and a COD of 836 mg / L into the catalytic oxidation reactor, and add nano-iron oxide catalyst at a rate of 100 mg / L, and add 1.2 L / L s m 2 The aeration intensity is aerated with air, and the reaction is 20 minutes;

[0030] ② Add FeSO to the wastewater at concentrations of 360mg / L and 4.0mmol / L respectively 4 ·7H 2 O and H 2 o 2 , and reacted for 30min at a stirring speed of 200r / min;

[0031] ③Add cationic PAM at a concentration of 0.5mg / L, stir rapidly at a speed of 300r / min for 3min, and then stir slowly at a speed of 40r / min for 10min;

[0032] ④Wastewater enters the high-efficiency slanted plate sedimentation tank, settles for 15 minutes, and exits.

[0033] After being treated by this process, the turbidity of the effluent is less than 5NTU, the chroma is less than 25, the COD is less than 120mg / L, and the removal rates are over 95%, 98% and 85% ...

Embodiment 2

[0035] ①Put the comprehensive chemical wastewater with a pH value of 6.98, a turbidity of 148.9NTU, a chromaticity of 1763, and a COD of 2320mg / L into the catalytic oxidation reactor. / s·m 2 The aeration intensity is aerated with air, and the reaction is 35 minutes;

[0036] ② Add FeSO to wastewater at concentrations of 600mg / L and 6.5mmol / L respectively 4 ·7H 2 O and H 2 o 2 , and reacted for 60min at a stirring speed of 200r / min;

[0037] ③ Add cationic PAM at a concentration of 0.9mg / L, stir rapidly at a speed of 300r / min for 5min, and then stir slowly at a speed of 40r / min for 15min;

[0038] ④Wastewater enters the high-efficiency slanted plate sedimentation tank, settles for 30 minutes, and exits.

[0039] After being treated by this process, the turbidity of the effluent is less than 8NTU, the chroma is less than 27, the COD is less than 280mg / L, and the removal rates are over 94%, 98% and 87% respectively.

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Abstract

The invention provides a catalytic oxidation-compound flocculation integrated treatment process which aims to solve the problem that organic comprehensive waste water is difficult to treat because the organic comprehensive waste water contains organic substances difficult to biologically degrade. The treatment process integrates catalytic oxidation, Fenton oxidation, compound flocculation, high-efficiency precipitation and other technical advantages; a high-efficiency catalyst is used to improve the treatment efficiency or biodegradability; and a compound flocculant is used as the core to simplify the treatment process and ensure the stable treatment effect, thereby achieving the catalytic oxidation-compound flocculation integration. The invention has the characteristics of concise technical line, high treatment efficiency and simple operation process.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an integrated process for chemical comprehensive wastewater treatment. Background technique [0002] In the process of chemical production, the treatment of chemical comprehensive wastewater has always been a headache. There are many types of enterprises involved in the chemical industry, such as fine chemicals, coking, petroleum, pharmaceuticals, dyes, etc. The wastewater discharged by industrial enterprises mainly includes process water, equipment cooling water, washing water and other production wastewater and domestic sewage of enterprise employees. There are many types of industrial enterprises with different production processes, and the waste water produced is completely different in nature and composition, such as phenol, organophosphorus and organochlorine, polycyclic aromatic hydrocarbons, heterocyclic compounds, chlorinated aromatic compoun...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/74
Inventor 田秉晖罗九鹏辛丽花韩菲贾大伟
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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