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Treatment method of rubber wastewater

A rubber waste water and treatment method technology, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve unsatisfactory problems, save maintenance and operating costs, and save operating costs , the effect of excellent treatment effect

Active Publication Date: 2020-04-14
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot meet the standard requirement of stably reaching COD≤50mg / L

Method used

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  • Treatment method of rubber wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The mixing volume ratio of rubber wastewater and high-salt wastewater in the influent is 1:16, the COD of rubber wastewater is 210-240mg / L, and the NH 3 -N is 8.0 to 12.0 mg / L.

[0037] Use the following processing methods for processing:

[0038] (1) After mixing the rubber sewage and ethylene high-salt sewage (the ethylene high-salt sewage is the sewage produced in the ethylene production process) in proportion, it is first pumped into the hydrolytic acidification tank. Under the action of bacteria, the organic pollutants in it are degraded into small molecular substances, and the biodegradability of sewage is improved. The hydraulic retention time of the hydrolytic acidification tank is 11.3h, the dissolved oxygen is <0.5mg / L, and the sludge reflux ratio is 100 %, the sludge concentration is 3mg / L; after the effluent is separated from mud and water, the settled sludge flows back to the front end of the hydrolytic acidification tank, and the supernatant flows into th...

Embodiment 2

[0044] The mixing volume ratio of rubber wastewater and high-salt wastewater in the influent is 1:8, the COD of rubber wastewater is 220-250mg / L, and the NH 3 -N is 9.8 to 15.6 mg / L.

[0045] Use the following processing methods for processing:

[0046] (1) After mixing rubber sewage and ethylene high-salt sewage (ethylene high-salt sewage is sewage produced in the process of ethylene production, calcium ions at 3000mg / L and chloride ions at 4000mg / L) in proportion, first pump it into the hydrolysis acidification tank , the hydrolytic acidification tank adopts submerged stirring to realize the mixing of mud and water. Under the action of facultative bacteria, the organic pollutants in it are degraded into small molecular substances, and the biodegradability of sewage is improved. The hydraulic retention time of the hydrolytic acidification tank is 11.3h, and the dissolved Oxygen is <0.5mg / L, sludge reflux ratio is 80%, and sludge concentration is 4mg / L; after the effluent is ...

Embodiment 3

[0052] The mixing volume ratio of rubber wastewater and high-salt wastewater in the influent is 1:4, the COD of rubber wastewater is 220-250mg / L, and the NH 3 -N is 9.8 to 15.6 mg / L.

[0053] Use the following processing methods for processing:

[0054] (1) After mixing rubber sewage and ethylene high-salt sewage (ethylene high-salt sewage is sewage produced in the process of ethylene production, calcium ions are at 5300mg / L, and chloride ions are at 8000mg / L), they are first pumped into the hydrolysis acidification tank , the hydrolytic acidification tank adopts submerged stirring to realize the mixing of mud and water. Under the action of facultative bacteria, the organic pollutants in it are degraded into small molecular substances, and the biodegradability of sewage is improved. The hydraulic retention time of the hydrolytic acidification tank is 11.3h, and the dissolved Oxygen is <0.5mg / L, sludge reflux ratio is 50%, and sludge concentration is 4mg / L; after the effluent ...

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Abstract

The invention belongs to the field of chemical engineering and environment protection and particular and particularly relates to a treatment method for rubber waste water. The rubber waste water is mixed with ethylene high salt waste water for treatment. The treatment method includes the following steps: performing hydrolytic acidification under the effect of facultative bacteria, performing air aeration, and then performing contact oxidization with a bio-membrane attached on a semi-soft filler, and finally performing biological aerated filter tank treatment. In the method, nutritional substances, such as nitrogen and phosphorus, being rich in the high salt waste water are fully utilized, so that operation cost is greatly reduced. Air aeration is employed, so that operation cost is reduced and establishment of nitrification is promoted, thus completely removing ammonia nitrogen in the waste water. The rubber waste water is 400-500 mg / L in COD and is 50-55 mg / L in NH3-N; and by means of the method, discharged water is 34.2-48.4 mg / L in COD, which can stably reach the discharge standard being less than 50 mg / L; and meanwhile, the discharged water also reaches the discharge standard of NH3-N being less than 5 mg / L.

Description

technical field [0001] The invention belongs to the field of chemical environmental protection, and in particular relates to a treatment method for rubber waste water. Background technique [0002] Rubber wastewater contains a large amount of organic substances that are difficult to biodegrade, such as benzene series, polymerization inhibitors, initiators, diffusing agents, coagulants, etc. The water quality is complex and the biodegradability is poor. It is a kind of wastewater that is difficult to treat. At present, the treatment methods of rubber wastewater mainly include: coagulation sedimentation method, coagulation air flotation method, electrochemical method, biological method, advanced oxidation method for advanced treatment, adsorption method and reverse osmosis method, etc. Due to the different requirements and goals of processing, the processing methods adopted are also different. However, it is difficult to reduce the COD concentration in rubber wastewater to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/38
Inventor 张方银王建娜潘咸峰李茂双
Owner CHINA PETROLEUM & CHEM CORP
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