A method for aeration and oxygenation of bottom layer of vertical flow artificial wetland
A constructed wetland, vertical flow technology, applied in water aeration, chemical instruments and methods, sustainable biological treatment, etc., can solve the problems of reduced oxidative decomposition rate of organic matter, incomplete nitrification reaction, restricted removal, etc. The effect of preventing clogging and strong engineering practicability
Inactive Publication Date: 2014-10-29
NANJING INST OF GEOGRAPHY & LIMNOLOGY
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The lower oxygen concentration leads to a decrease in the oxidation and decomposition rate of organic matter in the wetland system, and the nitrification reaction is not complete, which limits the removal of nitrogen in the wetland system, and the blockage of the wetland system is mostly due to the retention of suspended solids and organic matter in the wetland system, Cumulatively caused
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
example
[0020] This technology has been used in the "High Load Constructed Wetland Sewage Purification Technology Demonstration Project" of the National 15th 863 Water Special Project "Dianchi Lake River Pollution Control Technology Research and Engineering Demonstration" on the north bank of Dianchi Lake in Kunming City, Yunnan Province. Engineering processing capacity is 4000m 3 / d has been running continuously for more than 5 years since September 2007. The system is running stably and all functions are good. As the core purification unit in the mixed sewage treatment of Linhu villages and tourist attractions on the north bank of Dianchi Lake, the removal rate of main pollutants in this vertical flow wetland reached: C0D Cr 60.64%, NH 4+ -N 95.6%, TP 30.88%, BOD 5 51.41%, SS 51.82%. NO 3 The concentration of -N increased by 646 times, creating favorable conditions for the next step of denitrification and denitrification.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to an aeration oxygenation method of the bottom layer of a vertical flow artificial wetland, which belongs to the field of water pollution control. The aeration oxygenation method disclosed by the invention can realize the aeration-mode automatic control by adding an artificial micro-aeration system to the traditional upward flow and vertical potential flow wetland water-inlet system, increase the dissolved oxygen content of intake water and enhance the processing capacity of the wetland system by improving the oxidation environment inside the wetland system by mixing water and vapors before the water and the vapors enter the wetland system, prevent the impurities from blocking an air pore through reverse-blocking sleeve design and keep the continuous and stable operation of the artificial micro-aeration system; and the technology can be applied to the design and upgrade reconstruction of a newly constructed or previously constructed vertical flow artificial wetland.
Description
(1) Technical field [0001] This technology belongs to the field of water pollution control and can be applied to vertical flow constructed wetlands to improve the oxidation environment of the system and improve the purification effect. (2) Background technology [0002] As a technology for water pollution control, vertical flow constructed wetland has the advantages of low investment and operation cost, good ecological security, and strong scale applicability, but at the same time, it has a large area, easy to block, limited purification capacity, and large seasonal fluctuations. The disadvantages make people often flinch from it. Most of the hydraulic loads in the constructed wetland sewage treatment projects currently in operation in my country are 0.025-0.2m 3 / m 2 Between .d, COD Cr The surface load is only 0.007-0.01kg / m 2 .d. According to the US Environmental Protection Agency's survey of more than 100 constructed wetlands in operation, nearly half of the wetland ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C02F7/00C02F3/32
CPCY02W10/10
Inventor 潘继征李文朝柯凡冯慕华
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY