System and method for treating refractory organics

A technology of refractory organic matter and oxidation system, which is applied in the field of systems for treating refractory organic matter in chemical industrial park wastewater. It can solve the problems of inability to meet the standard stably, fluctuate easily, and the difficulty of wastewater containing aromatic hydrocarbons, so as to improve the efficiency of ozone oxidation. , Reduced treatment cost, high removal capacity

Inactive Publication Date: 2015-04-22
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

[0005] Aiming at the problems that the treatment of difficult-to-degrade industrial wastewater tends to fluctuate during the upgrading of the secondary effluent of the sewage plant and the process of reclaimed water reuse, and

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  • System and method for treating refractory organics
  • System and method for treating refractory organics

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Embodiment 1

[0030] A system for treating refractory organic matter, comprising an ozone oxidation system, a biological aerated filter and an ultrafiltration membrane system, wherein the ozone oxidation system, the biological aerated filter and the ultrafiltration membrane system are sequentially connected;

[0031] The ozone catalyst used in the ozone oxidation system is TiO 2 -MnO 2 / Al 2 o 3 ;TiO 2 -MnO 2 / Al 2 o 3 The molar ratio with ozone is 0.01~5:1;

[0032] The biological aerated filter (BAF) is filled with ceramsite as a biological filling material;

[0033] The ultrafiltration membrane system is equipped with a pre-coating layer, which is made of zeolite powder, which enters the ultrafiltration membrane through sand filtration at a rate of 100mg / L through a peristaltic pump.

[0034] Among them, TiO 2 -MnO 2 / Al 2 o 3 The ozone catalyst is prepared by "dipping-drying-roasting" process.

[0035] The biological aerated filter (BAF) is an upflow biological aerated filt...

Embodiment 2

[0039] The effluent water quality of a township chemical industrial park sewage plant is shown in Table 1:

[0040] Table 1 Water quality of effluent

[0041] water quality index pH COD NH 4 + -N Turbidity UV 254 Concentration (mg / L) 7-9 100-120 20-30 30.7-60 0.68-0.84

[0042] A method for treating refractory organic matter in the present embodiment treats the effluent of a township chemical industrial park sewage plant described in Table 1, and the steps are as follows:

[0043] (1) Ozone catalytic oxidation technology is used to pretreat the effluent of the secondary sedimentation tank of the sewage plant; among them, the ozone catalyst uses TiO 2 -MnO 2 / Al 2 o 3 ; The dosage of ozone is 15mg / L, the gas velocity is 80mg / L, TiO 2 -MnO 2 / Al 2 o3 The molar ratio of the dosage to ozone is 0.01:1.

[0044] (2) Use biological aerated filter to treat the effluent treated in step (1): the effluent enters a biological aerated filter fi...

Embodiment 3

[0049] A kind of method for processing refractory organic matter of the present embodiment treats the effluent of a certain township chemical industrial park sewage plant described in Table 1, and its steps (1), (2) are the same as embodiment 2, the difference is only in TiO 2 -MnO 2 / Al 2 o 3 The molar ratio of the dosage to ozone is 1:1.

[0050] The effluent obtained after the treatment of steps (1) and (2) is further treated by using the pre-coated ultrafiltration membrane system: the effluent enters the ultrafiltration reverse osmosis system, and the ultrafiltration reverse osmosis system uses a peristaltic pump to transfer the zeolite powder The pre-coating material is injected into the ultrafiltration membrane to form a dense "protective film" on the surface of the ultrafiltration membrane, which effectively reduces the pollution of organic matter on the membrane surface and ensures the high efficiency and long-term stable operation of the membrane system.

[0051] D...

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Abstract

The invention provides a system and a method for treating refractory organics, and relates to the field of chemical industrial park sewage treatment plant refractory organics deep treatment and reclaimed water recycling. The invention adopts an advanced oxidation and composite biotechnology coupled deep treatment process. During an advanced oxidation process, ozone catalyst optimization control is carried out, wherein a selected ozone catalyst is TiO2-MnO2/Al2O3. Treated wastewater enters a biological aerated filter tank where a retention time is 12h, such that pollutants such as COD and ammonia nitrogen in the wastewater are further removed; and a pre-coated ultrafiltration membrane/reverse osmosis process is carried out, wherein the pre-coating material of an ultrafiltration membrane system is zeolite powder. Water discharged from reverse osmosis reaches a recycling standard, and can be reused by enterprises in the industrial park. Therefore, water resource is well utilized. The invention provides a novel choice for chemical industrial park pollution treatment, and has a good application prospect in the respect of industrial water recycling.

Description

technical field [0001] The invention belongs to the field of advanced treatment of organic matter and reuse of reclaimed water, and in particular relates to a system and method for treating refractory organic matter in wastewater in chemical industry parks. Background technique [0002] With the rapid development of the economy, chemical companies are currently developing towards the characteristics of industrial parks. After the first-level pretreatment of the enterprise, the wastewater in the chemical industry park mainly presents the characteristics of complex types of organic matter, poor biodegradability, large fluctuations in water quality and water volume, and certain biological toxicity, which brings great difficulties to the design and operation of the secondary wastewater plant. Studies have shown that ozone catalytic oxidation technology plays an important intermediate role in wastewater treatment. Biofilm method has the advantages of good adaptability to low-conc...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/444C02F1/78C02F3/02C02F2101/30C02F2301/08
Inventor 涂勇唐敏张耀辉陈勇李根峰曹春艳白永刚徐军
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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