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Method of treating hard-degrading high concentrated organic wastewater

A technology of organic wastewater and treatment methods, applied in the direction of water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of difficult removal of toxic compounds, complex systems, and large investment in special processes and other issues, to achieve the effects of comprehensive water discharge standards, large environmental benefits, and low operating costs

Inactive Publication Date: 2009-10-14
JIANGNAN UNIV
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  • Summary
  • Abstract
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Problems solved by technology

[0006] The purpose of this invention is to propose a new process for the treatment of refractory high-concentration organic wastewater by a Fenton oxidation (FOP)-anaerobic expanded granular sludge bed (EGSB)-aerobic membrane bioreactor (MBR) combined system, mainly to solve The following problems currently exist: (1) The efficiency of conventional methods for treating refractory high-concentration organic wastewater is not high, some toxic compounds are difficult to remove, and the effluent cannot really meet the discharge standards; (2) Some special processes require a large investment. The cost of wastewater treatment is high, and it is difficult to popularize and apply; (3) The system is relatively complicated, and the operation and operation requirements are high, and the stability of production needs to be improved.

Method used

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  • Method of treating hard-degrading high concentrated organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Fenton oxidation treatment of 2-naphthol production wastewater.

[0036] The water sample is self-prepared 2-naphthol simulated wastewater, and the water quality components are shown in Table 1

[0037] Table 12-naphthol simulated wastewater quality

[0038] COD (mg / L)

[0039] After 40 minutes of treatment according to the Fenton oxidation reaction conditions described in the manual, the COD concentration of the reactor effluent is 4000-5000 mg / L.

Embodiment 2

[0040] Example 2 EGSB reactor treatment of the Fenton oxidation effluent of Example 1

[0041] Table 2 Influent water quality of EGSB reactor

[0042]

[0043] The COD concentration of the reactor effluent is 500-800mg / L.

Embodiment 3

[0044] Embodiment 3 integrated MBR reactor handles the effluent of embodiment 2

[0045] Table 3 Influent Water Quality of Membrane Bioreactor

[0046] source of waste water

[0047] The COD concentration of the reactor effluent is 50-90mg / L.

[0048] The total COD removal of the FOP-EGSB-MBR system is shown in Table 4.

[0049] Table 4 COD removal of FOP-EGSB-MBR system and different processing units

[0050] project

[0051] Note: The unit is mg / L.

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Abstract

A treatment method for persistent high concentration organic wastewater pertains to environmental protection technology area. The invention utilizes the combined system of Fenton Oxidation Process (abbr. FOP), Expanded Granular Sludge Bed (abbr. EGSB) and Membrane Bioreactor (abbr. MBR) to treat persistent high concentration organic wastewater. The Fenton Higher Oxidation treatment can do part degradation of COD, and transform some persistent organic compound with toxic properties into chemical degradation-labile intermediate product, thereby improving the degradation performance of wastewater. The anaerobic treatment can get rid of most COD in the wastewater to guarantee high load and low cost in the complete treatment process. The aerobic treatment can ensure the effluent steadily achieves the discharge standard and realize the environment and social benefit of the whole techniques. By adopting the invention, the COD and TN in effluent with persistent high concentration organic wastewater can be reduced by 80 percent to 95 percent, and fully meet the grade one standard of national integrated wastewater discharge standard.

Description

technical field [0001] A treatment method for refractory high-concentration organic wastewater belongs to the technical field of environmental protection. A combination of advanced oxidation technology, high-efficiency anaerobic biological treatment technology and new aerobic biological treatment technology is used to treat refractory high-concentration organic wastewater, specifically through Fenton oxidation reactor (FOP)-anaerobic expanded granular sludge bed (EGSB) reaction Treated by a combined system of aerobic membrane bioreactor (MBR). Background technique [0002] Generally speaking, refractory high-concentration organic wastewater has the following characteristics: (1) The water quality is complex and harmful, most of which are included in the blacklist of environmental priority pollutants controlled by my country and the US EPA; (2) COD and BOD 5 High concentration. COD up to 90000mg / L, BOD 5 Up to 38000mg / L; (3) High salt content. Common salts are mainly chlo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/72C02F3/30C02F101/30
Inventor 陈坚华兆哲王春堵国成李秀芬
Owner JIANGNAN UNIV
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