Method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater

A technology for suspended solids and rainwater, applied in chemical instruments and methods, water pollutants, runoff/rainwater treatment, etc., can solve problems that cannot be directly applied to iron and steel enterprises, and achieve good social and environmental benefits

Pending Publication Date: 2022-03-01
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the industrial production of iron and steel enterprises requires COD to be lower than 15 mg / L, ammonia nitrogen to be lower than 0.1 mg / L, and suspended solids to be lower than 20 mg / L. However, after rainwater collection, COD, ammonia nitrogen, and suspended solids in rainwater have not been removed or Reduced to qualified standards, so it cannot be directly applied to related iron and steel enterprises

Method used

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  • Method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater

Examples

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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a method for removing COD, ammonia nitrogen and suspended solids in rainwater includes an inlet pump 1, a multi-layer filter 2 and a drainage pump 7, and the output end of the inlet pump 1 and the input end of the multi-layer filter 2 pass through Pipeline connection, the output end of the multilayer filter 2 is connected with the input end of the drainage pump 7 through a pipeline, and the inside of the multilayer filter 2 is filled with a gravel layer 3, a modified iron slag layer 4, and a modified iron slag layer from bottom to top. Concave-convex soil layer 5 and quartz sand layer 6, gravel layer 3, modified iron slag layer 4, modified concave-convex soil layer 5 and quartz sand layer account for 4%, 50% and 50% of the total volume of multi-layer filter 2 respectively. 42% and 4%, the gravel apparent density of gravel layer 3 is 2510kg / m 3 , the particle size is 100 mesh, the preparation process of the modified iron slag in the modified i...

Embodiment 2

[0036] Such as figure 1 As shown, a method for removing COD, ammonia nitrogen and suspended solids in rainwater includes an inlet pump 1, a multi-layer filter 2 and a drainage pump 7, and the output end of the inlet pump 1 and the input end of the multi-layer filter 2 pass through Pipeline connection, the output end of the multilayer filter 2 is connected with the input end of the drainage pump 7 through a pipeline, and the inside of the multilayer filter 2 is filled with a gravel layer 3, a modified iron slag layer 4, and a modified iron slag layer from bottom to top. Concave-convex soil layer 5 and quartz sand layer 6, gravel layer 3, modified iron slag layer 4, modified concave-convex soil layer 5 and quartz sand layer account for 2%, 48% and 48% of the total volume of multi-layer filter 2 respectively. 48% and 2%, the gravel apparent density of gravel layer 3 is 2440kg / m 3 , the particle size is 100 mesh, the preparation process of the modified iron slag in the modified i...

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Abstract

The invention relates to the technical field of water treatment, and discloses a method for removing COD (chemical oxygen demand), ammonia nitrogen and suspended solids in rainwater, which comprises a water inlet pump, a multi-layer filter and a drainage pump, and the output end of the water inlet pump is connected with the input end of the multi-layer filter through a pipeline; the output end of the multi-layer filter is connected with the input end of the drainage pump through a pipeline, and the interior of the multi-layer filter is sequentially filled with a gravel layer, a modified iron slag layer, a modified attapulgite soil layer and a quartz sand layer from bottom to top; the method specifically comprises the following steps that rainwater enters the multi-layer filter through the water inlet pump; sequentially passing through a gravel layer, a modified iron slag layer, a modified attapulgite soil layer and a quartz sand layer; and finally, the rainwater treated by the multi-layer filter is pumped into an industrial water system of a steel mill through a drainage pump. The invention discloses a method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater, which realizes the purpose of industrial reutilization of rainwater and belongs to a green low-carbon production process.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for removing COD, ammonia nitrogen and suspended matter in rainwater. Background technique [0002] Rainwater collection and reuse is a green and low-carbon implementation method for industrial enterprises. Domestic iron and steel enterprises have certain indicators for COD, ammonia nitrogen and suspended solids in industrial production water. Only by removing pollutants such as COD, ammonia nitrogen and suspended solids in rainwater can rainwater Can be applied to iron and steel enterprises. Generally, the industrial production of iron and steel enterprises requires COD to be lower than 15 mg / L, ammonia nitrogen to be lower than 0.1 mg / L, and suspended solids to be lower than 20 mg / L. However, after rainwater collection, COD, ammonia nitrogen, and suspended solids in rainwater have not been removed or Reduced to qualified standards, so it cannot be directly app...

Claims

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Application Information

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IPC IPC(8): C02F9/02B01J20/24B01J20/30C02F101/16
CPCC02F1/001C02F1/288B01J20/12B01J20/24C02F2101/16C02F2103/001
Inventor 王湘韦晶晶李恩超郭军陈欣
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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