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Method for treating sewage of circulating cooling water in renewable water resource

A technology of circulating cooling water and treatment methods, applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems such as difficulty in meeting discharge requirements to achieve elimination of adverse effects, Improve denitrification efficiency and denitrification effect

Active Publication Date: 2019-05-24
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the content of refractory organic matter in circulating cooling effluent is high, it is difficult to meet the standard discharge requirements only by relying on this process

Method used

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  • Method for treating sewage of circulating cooling water in renewable water resource

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Embodiment 1

[0029] During the treatment process of regenerated water source circulating water and sewage in a thermal power plant, the influent CODcr is 80-150mg / L, ammonia nitrogen is 8-15mg / L, total nitrogen is 30-50mg / L, and total phosphorus is 1.5-3.5mg / L . The wastewater enters the self-cleaning filter after adjusting the water volume and quality in the regulating tank, and the effluent from the self-cleaning filter enters the ozone oxidation pool from the upper part. The Kongbu air cap diffuses into the wastewater and fully contacts with the wastewater countercurrently. The dosage of ozone is 15mg / L, the hydraulic retention time is 30min, and an ozone tail gas destroyer is installed on the top of the pool. The effluent from the ozone oxidation pool enters the buffer pool for a residence time of 45 minutes. The effluent from the buffer pool enters the aerobic pool, and biological ropes are placed in the pool. The material is vinylon, the outer diameter is 30mm, the filling ratio is ...

Embodiment 2

[0032] During the treatment process of regenerated water source circulating water and sewage of a thermal power plant, the influent CODcr is 100-200mg / L, ammonia nitrogen is 10-18mg / L, total nitrogen is 30-65mg / L, and total phosphorus is 1.5-5mg / L. The wastewater enters the self-cleaning filter after adjusting the water volume and quality in the regulating tank, and the effluent from the self-cleaning filter enters the ozone oxidation pool from the upper part. The Kongbu gas cap diffuses into the wastewater and fully contacts with the wastewater countercurrently. The dosage of ozone is 20mg / L, the hydraulic retention time is 40min, and an ozone tail gas destroyer is installed on the top of the pool. The effluent from the ozone oxidation pool enters the buffer pool for a residence time of 50 minutes. The effluent from the buffer pool enters the aerobic tank, and biological ropes are placed in the pool, made of vinylon and polypropylene, with an outer diameter of 45mm, a filling...

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Abstract

The invention discloses a method for treating sewage of circulating cooling water in a renewable water resource, and belongs to the field of wastewater treatment. The method comprises the steps that the sewage of the circulating cooling water enters an adjusting tank to adjust the water quality and the water flow, and then the sewage passes through a filter, an ozone oxidation tank, a buffering tank, an oxygen elimination tank, an anaerobic tank, an aerobiotic tank, a primary sedimentation tank, a phosphorous-removal mixing tank and a fiber filter in sequence for treatment, wherein the oxygenelimination tank is filled with bio-cord filler, the anaerobic tank and the aerobiotic tank are filled with filler, the anaerobic tank supplements external carbon source, nitrification liquid at the tail end of the aerobiotic tank flows back into the oxygen elimination tank and the anaerobic tank,, and slurry in the primary sedimentation tank flows back into the oxygen elimination tank. By means of the method, ammonia nitrogen, total nitrogen, total phosphorus, organic matter difficult to degrade and other pollutants in the renewable water resource can be removed, and the outlet water obtainedafter treatment can meet the requirements that the CODcr is equal to or lower than 30 mg / L, the total nitrogen is equal to or lower than 15 mg / L, the ammonia nitrogen is equal to or lower than 1.5 mg / L and the total phosphorus is equal to or lower than 0.3 mg / L.

Description

technical field [0001] The invention relates to a method for treating circulating cooling water sewage from regenerated water sources, which belongs to the technical field of wastewater treatment, and more specifically relates to a method for treating circulating cooling water sewage by using advanced oxidation and biochemical combination. Background technique [0002] China is one of the countries seriously short of fresh water resources, and the shortage of water resources has become an important factor restricting the sustainable development of my country's thermal power industry. In 2004, the National Development and Reform Commission issued the "Notice on Relevant Requirements for the Planning and Construction of Coal-fired Power Plant Projects", requiring that in the northern water-scarce areas, the use of reclaimed water or other waste water from urban sewage treatment plants is encouraged. Since urban reclaimed water has the advantages of stable water volume, local a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 时孝磊贺军张瑞臣衡世权马龙信王凯阳
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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