Artificial wet land and uses thereof

A constructed wetland and in-situ technology, applied in metallurgical wastewater treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problems of high concentration of Fe and Mn ions, achieve large treatment capacity, good removal effect, The effect of low processing cost

Active Publication Date: 2008-10-29
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Therefore, the object of the present invention is to: provide a kind of artificial wetland, described artificial wetland uses gravel and manganese sand as combined filler, and described artificial wetland can well solve the excessive concentration of Fe, Mn ion in iron and steel industry waste water reuse The problem

Method used

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  • Artificial wet land and uses thereof
  • Artificial wet land and uses thereof
  • Artificial wet land and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] like figure 1 As shown, the size of the structural horizontal subsurface flow wetland is 15×8m, and the effective area is 93.8m 2 . It is divided into three grids, each grid is 15×2.3m in size, the slope is 5‰, the thickness of the wetland filler layer is 60cm, and the covering soil is 15cm. To prevent leakage, an anti-seepage membrane is laid on the bottom of the wetland.

[0061] In the wetland operation, the water distribution and metering of the three corridors are carried out by the water distribution tank with a triangular metering weir. The water from the water distribution tank passes through the flower wall at the front end of the grid and then flows horizontally into the wetland. A 500mm long pebble (50-100mm in size) water distribution area is set behind the flower wall. After uniform distribution of water, the wetland water passes through the combined packing area composed of 20-30mm gravel, 10-20mm gravel, 5-15mm gravel and 8-16mm manganese sand. The rat...

Embodiment 2

[0069] Other is with embodiment 1, and difference is:

[0070] After uniform water distribution, the wetland inflow passes through the combined packing area composed of 30-40mm gravel, 20-30mm gravel, 10-15mm gravel and 10-20mm manganese sand. The ratio of gravel filler and manganese sand filler with different particle sizes is 60:40 Proportioning, manganese sand filler is arranged in the front section of the packing bed.

Embodiment 3

[0072] Other is with embodiment 1, and difference is:

[0073] After uniform distribution of water, the wetland water passes through the combined packing area composed of 15-25mm gravel, 10-15mm gravel, 5-10mm gravel and 6-8mm manganese sand. The ratio of gravel filler and manganese sand filler with different particle sizes is 80:20 Proportioning, manganese sand filler is arranged at the end of the packing bed.

[0074] According to the artificial wetland of the present invention, the construction cost is low, the investment can be greatly saved, the operation and management are convenient, and the treatment cost is low; the present invention uses manganese sand as the new filler of the artificial wetland, which can well solve the problem of Fe, The problem of high concentration of Mn ions; the wastewater treatment effect of the present invention is better, the treatment capacity is larger, and the impact load resistance is stronger, so that most of the indicators of the treat...

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Abstract

The invention provides a constructed wetland and the application thereof; wherein, the constructed wetland takes gravels and manganese sands as combined packing and can be used for treating wastewater in industries, such as iron and steel industry, etc., the wetland can reduce the nutrient content of organics, nitrogen, phosphorus, etc. in water, and meanwhile can remove metal ions, such as Fe, Mn, Cd, Pb, etc., more particularly, can reduce higher content of ions of Fe and Mn in iron and steel industry wastewater so that the index achieves the water quality standard of reclaimed water used as cooling water and the water intake quality requirement of reverse osmosis desalination process in Code for Engineering Design of Wastewater Reclamation and Reuse. The wetland has less engineering investment, simple management, low operation and maintenance cost, stable processing effect, so as to have better environmental, economic and social benefits. The wetland has better wastewater processing effect, stronger treatment capacity and stronger shock resistance loading capability, so the wetland can greatly solve the problem of excessively high concentration of Fe and Mn ions in wastewater reuse of the iron and steel industry, etc.

Description

Technical field [0001] The present invention relates to the technical field of environmental protection. Specifically, the present invention relates to a constructed wetland using gravel and manganese sand as combined fillers and its application in wastewater reuse treatment in industries such as steel and steel. Background technique [0002] Constructed wetland is a new wastewater treatment technology developed in the past thirty years. Since the former West Germany first built artificial wetlands in 1974, the technology has developed rapidly in the United States, Canada and some developed countries in Europe. The research on constructed wetlands in my country started relatively late. In July 1990, my country's first constructed wetland sewage treatment project, the Bainikeng Constructed Wetland Sewage Treatment System, was built in Shenzhen. [0003] Constructed wetlands are artificially mixed with soil and filler (such as gravel, etc.) to form a filler bed on a depressio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34C02F103/16
CPCY02W10/10
Inventor 朱荣健张宜莓叶正徐竟成黄翔峰李光明范海青付兴振闻岳
Owner BAOSHAN IRON & STEEL CO LTD
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