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Artificial wetland composite packing for treating rural domestic sewage

A technology of constructed wetlands and composite fillers, applied in biological water/sewage treatment, water/sewage treatment, adsorbed water/sewage treatment, etc., to save construction costs, promote adsorption of nitrogen and phosphorus, reproduction and growth of microorganisms, and chemical stability strong effect

Inactive Publication Date: 2017-03-08
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of existing constructed wetland fillers and provide a highly efficient and economical constructed wetland composite filler for rural domestic sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix sea oyster shells, waste ceramsite and zeolite at a mass ratio of 3:2:1, and machine them into particles with a particle size of 3-20mm. Under the average water temperature of 25°C, it is used in the vertical subsurface flow artificial wetland outlet mode, and the area of ​​the wetland system is 5m 2 , planting wetland plants as calamus. The hydraulic load of the system is 0.01m / d, and continuous water intake is adopted. Through the synergistic effect of aerobic ammonium oxidizing bacteria, nitrite oxidizing bacteria, anammox oxidizing bacteria and denitrifying bacteria, pollutants in the water are effectively degraded.

[0022] Influent COD, ammonia nitrogen, total nitrogen, and total phosphorus concentration are 48mg·L respectively -1 , 2.9mg·L -1 , 3.2mg·L -1 , 0.5mg·L -1 domestic sewage. After being treated by the filler of the present invention, the removal rates of ammonia nitrogen, total nitrogen and total phosphorus are all above 85%, and the concentrat...

Embodiment 2

[0024] Mix sea oyster shells, waste ceramsite and zeolite at a mass ratio of 4:2:1, and process them into particles with a particle size of 3-20cm by mechanical processing. Under the average water temperature of 25°C, it is used in the vertical subsurface flow artificial wetland outlet mode, and the area of ​​the wetland system is 5m 2 , planting wetland plants as calamus. The hydraulic load of the system is 0.01m / d, and continuous water intake is adopted, through the synergistic effect of aerobic ammonium oxidizing bacteria, nitrite oxidizing bacteria, anaerobic ammonium oxidizing bacteria and denitrifying bacteria.

[0025] Effectively degrade pollutants in water. Influent COD, ammonia nitrogen, total nitrogen, and total phosphorus concentration are 48mg·L respectively -1 , 2.9mg·L -1 , 3.2mg·L -1 , 0.5mg·L -1 domestic sewage. After being treated by the filler of the present invention, the removal rates of ammonia nitrogen, total nitrogen and total phosphorus are all a...

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Abstract

The invention discloses artificial wetland composite packing for treating rural domestic sewage. The artificial wetland composite packing is prepared from oyster shells, waste haydite and zeolite. Aquatic wastes such as the oyster shells, the industrial wastes such as ceramics and the zeolite are used as the main raw materials of the composite packing, and are machined into particles with suitable sizes, and the particle size range is 3-20 mm. According to the filling mode, the particle size of packing on the lower layer is large, and the particle size of the packing on the upper layer is small. Preferably, the mixed mass ratio of the oyster shells, the waste haydite and the zeolite is (3-4): 2: 1.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to an artificial wetland composite filler used for rural domestic sewage treatment. Background technique [0002] Constructed wetland sewage treatment system is a kind of sewage treatment technology developed in the 1970s. Because of its good treatment effect, low construction and operation costs, and easy maintenance and management, it has been widely valued by all countries in the world. It has become a fast-growing technology in recent years. A new technology for sewage treatment. At present, it is widely used in the treatment of eutrophic water, landfill leachate, livestock and poultry breeding wastewater, and food wastewater. [0003] The filler is an important part of the constructed wetland, which provides a growth environment for wetland plants and microorganisms, and itself also participates in the processes of filtration, adsorption, and microbial degrad...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34C02F1/28C02F101/10C02F101/16
CPCC02F3/32C02F1/288C02F3/34C02F2003/001C02F2101/105C02F2101/16
Inventor 裘知蒋升飞
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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