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High COD, high ammonia nitrogen and high salinity industrial wastewater treatment method

A waste water treatment, high ammonia nitrogen technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the threats to the normal operation and service life of semi-permeable membranes, deposition Dirt pollution, poor degradation ability and other problems, to achieve the effect of saving construction investment, good separation effect and prolonging service life

Active Publication Date: 2010-01-06
SHANDONG TIEXIONG METALLURGICAL TECH CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In traditional activated sludge, there are few types of bacteria, insufficient quantity, and poor degradation ability. In order to meet the discharge standards, sometimes the wastewater has to be diluted before biochemical treatment to reduce the difficulty of treatment.
Reverse osmosis membrane separation technology has a high removal rate for various impurities such as inorganic salts, organic matter, and colloids in wastewater, and is energy-saving and environmentally friendly. , which seriously threatens the normal operation and service life of the semipermeable membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A kind of coking wastewater treatment method

[0029] a. Pretreatment: Use traditional precipitation and filtration methods to remove mechanical impurities, wastewater indicators: COD3000-6000mg / L, ammonia nitrogen 200-450mg / L, various salts 5000-10000mg / L;

[0030] b. Chemical treatment: add hydroxyethylidene diphosphonic acid, phosphinated hydrolyzed polymaleic anhydride, sulfonate-acrylic acid multi-polymer compounded with a solid content of 25%-32% into the pretreated wastewater Scale inhibitor, corrosion inhibitor, dispersant, the added concentration is 20ppm.

[0031] c. Preliminary biochemical treatment of nitrification and denitrification: The wastewater after chemical treatment does not need to be diluted, and directly enters the nitrification biochemical reaction pool and denitrification biochemical reaction pool for nitrification and denitrification biochemical treatment.

[0032] Nitrification biochemical treatment adopts nitrification microbia...

Embodiment 2

[0044] Embodiment 2 A kind of processing method of synthetic ammonia nitrogen fertilizer production wastewater

[0045] Wastewater indicators: COD 800-5000mg / L, ammonia nitrogen 200-450mg / L, various salts 2000-5000 mg / L; according to the method and steps of Example 1, the membrane element of the membrane bioreactor is polyimide copolymer hollow fiber membranes. System effluent indicators: COD≤6mg / L, volatile phenol≤0.02mg / L, ammonia nitrogen≤1mg / L, conductivity≤200μs / cm, system desalination rate≥97%. After traditional mixed bed ion exchange treatment, the conductivity is ≤2μs / cm.

Embodiment 3

[0046] Example 3 A treatment method for iron and steel wastewater

[0047] Wastewater indicators: COD800-1500mg / L, ammonia nitrogen 200-300mg / L, various salts 2000-6000mg / L; the pH of the pretreated wastewater is adjusted between 7.0-7.5, and after treatment according to the method and steps of Example 1 Effluent indicators: COD≤10mg / L, volatile phenol≤0.02mg / L, ammonia nitrogen≤1mg / L, conductivity≤200μs / cm, system desalination rate≥97%. After traditional mixed bed ion exchange treatment, the conductivity is ≤2μs / cm.

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Abstract

The invention relates to a high COD, high ammonia nitrogen and high salinity industrial wastewater treatment method, in particular to a combination wastewater treatment process by chemical treatment, micro-organism treatment, membrane bioreactor advanced treatment and reverse osmosis composite membrane desalination finish machining treatment, belonging to the wastewater treatment. The method is an ideal wastewater treatment method which is characterized in that dilution is not used before the treatment, the membrane bioreactor treatment has high removal rate of COD and ammonia nitrogen, the contamination resistance reverse osmosis membrane is used for desalination and the quality of the treated water reach the medium-pressure boiler water consumption technical standards. By adopting the method of the invention, the wastewater which contains 800-6000mg / L of COD, 200-450mg / L of ammonia nitrogen and 2000-10000mg / L of total salt from the industries such as coal carbonization industry, nitrogen fertilizer industry, iron and steel industry and the like can be processed to desalted water for medium-pressure boiler through advanced treatment. The method can protect the environment, make waste profitable, save water and realize true zero emission.

Description

technical field [0001] The invention relates to a treatment method for industrial waste water with high COD, high ammonia nitrogen and high salinity, which belongs to waste water treatment, and especially relates to a combination of chemical treatment, microbial treatment, membrane bioreactor advanced treatment, and reverse osmosis composite membrane desalination finishing treatment. Industrial wastewater treatment process. Background technique [0002] Coking, nitrogen fertilizer, and iron and steel industry have a large amount of wastewater discharge, many types of pollutants, high COD, high ammonia nitrogen, and high salinity, which are wastewater that is difficult to treat. In order to protect the living environment of human beings, people in the industry have been making unremitting efforts in the treatment of industrial wastewater. Although traditional chemical treatment, biochemical treatment, and physical and chemical treatment methods have been continuously improve...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F5/00C02F1/44
CPCY02A20/131
Inventor 丁心悦王清涛邴进军杨大庆陈春平
Owner SHANDONG TIEXIONG METALLURGICAL TECH CO LTD
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