Waste water centralized processing method in chemical industrial park

A technology for centralized treatment and chemical parks, applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve threats, water environment hazards in chemical parks, and affect the quality of effluent water, etc., to prolong the service life , easy large-scale industrial application, cost-saving effect

Inactive Publication Date: 2010-09-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of economy and society, more and more types of chemicals are produced, and the water quality components of chemical wastewater are becoming more and more complex. This traditional treatment method can no longer meet the requirements of wastewater treatment. The main problems are: first, pretreatment It has been unable to effectively remove or partially remove pollutants from complex wastewater components, prevent fluctuations in water quality and water volume, and meet the technological requirements of subsequent biological treatment; secondly, a large number of xenobiotic compounds with complex structures and biological strangeness are in wastewater. Conventional biological treatment systems are difficult to decompose and oxidize them in a short period of time; finally, tail water treatment cannot effectively remove small molecular toxic pollutants, which affects the water quality of the effluent, and has a certain degree of harm or potential for the surrounding water environment of the chemical industry park. threaten

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Introduce chemical wastewater into the electrolytic cell for electrolysis, adjust the pH value of the wastewater to 6.0, control the electrolysis time to 30min, and the electrolysis pressure to 10V; then control the COD concentration of the effluent to 1000mg / L by diluting with water, and use dilute sulfuric acid or Ca( Oh) 2 Adjust the pH value to 6.0, add ammonium chloride to adjust the ammonia nitrogen concentration in the wastewater to 50mg / L, add potassium phosphate to adjust the phosphate concentration in the wastewater to 10mg / L, and add the trace element compound CoCl 2 ·6H 2 O, MnCl 2 4H 2 O, ZnCl 2 、NiCl 2 ·6H 2 O and (NH 4 ) 6 Mo 7 o 24 The mixture enters the high-efficiency biological fluidized bed, so that the concentration is 20-40μg / L, the residence time is 18h, and the ceramsite is used as the biological carrier; finally, the COD concentration of the effluent is controlled to 100mg / L, and the ozone-activated carbon process is used for treatment....

Embodiment 2

[0023] The chemical wastewater enters the electrolytic tank for electrolysis, adjusts the pH value of the wastewater to 7.0, controls the electrolysis time to 20 minutes, and the electrolysis pressure to 8V; then controls the COD concentration of the effluent to 1500mg / L, adjusts the pH value to 7.0, and adds ammonium sulfate to adjust the wastewater The ammonia nitrogen concentration is 75mg / L, adding potassium dihydrogen phosphate to adjust the phosphate concentration in the wastewater to 15mg / L, adding the trace element compound CoCl 2 ·6H 2 O, MnCl 2 4H 2 O, ZnCl 2 、NiCl 2 ·6H 2 O and (NH 4 ) 6 Mo 7 o 24 The mixture, so that the concentration is 1-20μg / , enters the intermittent aerated biological particle bed, and each operation cycle of the intermittent aerated biological particle bed includes water inflow, reaction, sedimentation, drainage and no-load, and the control time is 0.5 h, 10h, 3h, 0.5h, 2h, every 16h is a cycle, and zeolite is used as the biological c...

Embodiment 3

[0025] The chemical wastewater is introduced into the electrolytic tank for treatment, the pH value of the wastewater is adjusted to 9.0, the electrolysis time is controlled to 60min, and the electrolysis pressure is 5V; then the COD concentration of the effluent is controlled to 500mg / L, the pH value is adjusted to 7.0, and ammonium sulfate is added to adjust the wastewater The concentration of ammonia nitrogen is 25mg / L, adding sodium dihydrogen phosphate to adjust the phosphate concentration of wastewater to 5mg / L, adding trace element compound CoCl 2 ·6H 2 O, MnCl 2 4H 2 O, ZnCl 2 、NiCl 2 ·6H 2 O and (NH 4 )6Mo 7 o 24The mixture, so that the concentration is 60-80μg / L, enters the high-efficiency biological fluidized bed, the residence time is 24h, and activated carbon is used as the biological carrier; finally, the COD concentration of the effluent is controlled to 100mg / L, and the ozone-activated carbon process is used for treatment. The dosage is 5 mg / L, the resi...

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PUM

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Abstract

The invention discloses a centralized wastewater treatment method for chemical industrial parks, which belongs to the field of wastewater treatment. The method comprises the following steps: chemical wastewater is first pretreated through electrolysis; then the wastewater is subjected to biochemical treatment through an efficient biological flow bed reactor or an intermittent aeration biological granular bed reactor; and finally, the wastewater is subjected to advanced treatment through an ozone-activated carbon process. The method has the advantages that the method can adopt a pretreatment technique adapted to various water qualities of chemical wastewater to treat the chemical wastewater fast and efficiently according to the characteristic that the production wastewater of the chemical industrial parks is different in water quality and emission standard, develops a wastewater treatment integration technique for the chemical industrial parks, which combines point source pretreatment with centralized treatment and takes biological treatment as a core, realizes a safe treatment technique for tail water, has effluent indices meeting recycling standards, and is convenient for large-scale industrial application.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for centralized treatment of waste water in a chemical industry park. Background technique [0002] The chemical industry is one of the pillar industries of our country. While bringing huge economic benefits to the national economy, it also puts enormous pressure on environmental protection. In recent years, the construction of my country's chemical industry parks has developed rapidly, and has become a hot spot for foreign investment and China's economic growth. Therefore, environmental problems such as water resource pollution have become the key to restricting the sustainable development of chemical parks. Carry out applied research on wastewater treatment technologies in the parks to provide technical support for effectively solving industrial wastewater treatment problems in the process of park construction and development, and to promote chemical parks. The sus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/78C02F1/28
Inventor 任洪强张涛丁丽丽谭婧梁睿
Owner NANJING UNIV
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