Treatment method of rubber processing wastewater difficult to biodegrade

A technology that is difficult to biodegrade and process wastewater, applied in the field of treatment of rubber processing wastewater, can solve the problems of destroying molecular structure, difficult to treat low-concentration rubber processing wastewater, and difficult to treat low-concentration rubber processing wastewater. Biochemical, COD and Ammonia Nitrogen Concentration Reduction Effects

Inactive Publication Date: 2020-07-31
江苏南大华兴环保科技股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem in the prior art that it is difficult to treat the low-concentration rubber processing wastewater that is difficult to biodegrade, the present invention provides a treatment method for the difficult-biodegradable rubber processing wastewater. The wastewater mainly contains polymers in detergents and release agents. After mixing polyether compounds, polyols, alkyl sulfonates and fatty alcohol ethers, the production wastewater to be treated is mixed, and the floating oily organic matter is removed by air flotation treatment, and...

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  • Treatment method of rubber processing wastewater difficult to biodegrade
  • Treatment method of rubber processing wastewater difficult to biodegrade
  • Treatment method of rubber processing wastewater difficult to biodegrade

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Embodiment 1

[0034] The present invention provides a method for treating difficult-to-biodegradable rubber processing wastewater. The production wastewater is sequentially subjected to sewage mixing, air flotation treatment, primary coagulation precipitation, ozone catalytic oxidation, secondary mixing, nitrification and denitrification, and secondary coagulation. Treatment of precipitation. The production waste water includes but is not limited to project production waste water, ground flushing water, circulating water station sewage and condensed water, and waste water containing non-biodegradable pollutants produced during the production process can be treated by the present invention.

[0035] The specific processing steps are as follows,

[0036] S100. Mix production wastewater containing non-biodegradable pollutants. The COD concentration in the wastewater is 1000-3000mg / L, and the ammonia nitrogen concentration is 100-400mg / L; the mixed wastewater is discharged into the regulating tank; ...

Embodiment 2

[0053] The basic implementation mode of this embodiment is the same as that of Embodiment 1. The difference is that this embodiment provides a treatment method of production wastewater from a rubber processing wastewater project in Jiangsu. The specific steps are as follows:

[0054] S100. Mix production wastewater, ground flushing water, circulating water station sewage, and condensate, and send it to the regulating tank to adjust the pH to 8 with sulfuric acid;

[0055] S200. After the effluent enters the air flotation tank and is treated by the diffuse air flotation device-the diffuse air flotation method, PAC and PAM are added for flocculation and sedimentation;

[0056] S300. The effluent in S200 is sent to the ozone tower for catalytic ozone oxidation; the catalyst is titanium dioxide; based on the volume of the influent water, the volume ratio of the catalyst is 30%, and the ozone concentration is 6.0 mg / min, the hydraulic retention time is 20min;

[0057] S400. After mixing t...

Embodiment 3

[0063] The basic implementation mode of this embodiment is the same as that of Embodiment 1. The difference is that this embodiment provides a treatment method of production wastewater from a rubber processing wastewater project in Jiangsu. The specific steps are as follows:

[0064] S100. Mix production wastewater, ground washing water, circulating water station sewage, and condensate, and send it to the regulating tank to adjust the pH to 6 with hydrochloric acid;

[0065] S200. After the effluent enters the air flotation tank and is treated by the electrolytic air flotation device-electrolytic air flotation method, PAM is added for flocculation and precipitation;

[0066] S300. The effluent in S200 is sent to the ozone tower for ozone catalytic oxidation; the catalyst is manganese dioxide; based on the volume of the influent water, the volume ratio of the catalyst is 30%, and the ozone concentration is 4.0mg / min, hydraulic retention time is 10min;

[0067] S400. After mixing the ef...

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Abstract

The invention discloses a treatment method of low-concentration rubber processing wastewater difficult to biodegrade, and belongs to the technical field of chemical wastewater treatment. The inventionprovides a treatment method of rubber processing wastewater difficult to biodegrade. The method comprises the following steps: mixing production wastewater to be treated, removing floating oil organic matters through air floatation treatment, removing colloid organic matters through flocculent precipitation, carrying out catalytic ozonation on the wastewater, mixing effluent with domestic sewageand initial rainwater, carrying out nitrification and denitrification treatment, finally feeding into a coagulating sedimentation tank, carrying out secondary coagulating sedimentation, and discharging. The wastewater is pretreated to remove floating oil and a large amount of suspended organic matters, and the molecular structure of the non-biodegradable organic matters is further destroyed through catalytic ozonation, so that the biodegradability of the wastewater is improved, and the COD and ammonia nitrogen of the wastewater are reduced through nitrification and denitrification treatment, so that the effluent reaches the enterprise reuse water standard, and zero emission of enterprises is realized.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and more specifically, relates to a method for treating difficult-to-biodegradable rubber processing wastewater. Background technique [0002] The organic wastewater produced by rubber processing and molding companies is generally low-concentration wastewater that is difficult to biodegrade, and most of the wastewater is molding cooling wastewater, floor washing water, etc. During the rubber processing and molding process, no water is required to be added to the raw materials, so the amount of wastewater generated is small. Compared with other wastewater, this wastewater has the following three notable characteristics: 1. It contains a large amount of oily organic matter. The oil will form a film on the water surface to prevent the oxygen in the air from dissolving in the water and reduce the dissolved oxygen in the water. As a result, the plankton in the water body will die due to lack of oxy...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/16C02F103/38
CPCC02F9/00C02F2103/38C02F1/24C02F1/5281C02F2001/007C02F1/725C02F1/78C02F3/302C02F1/5236C02F1/56C02F2209/08C02F2101/16
Inventor 戴建军杨峰赵选英程夫苓刘君君
Owner 江苏南大华兴环保科技股份公司
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