Purification method of drainage outside rice field in estuarine area

A technology for paddy fields and emergent plants, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of occupying a lot of farmland, high cost, and reduced output, and achieve a reduction Concentration, lightening buffer, non-destructive effect

Inactive Publication Date: 2013-02-06
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the existing foreign technologies are applied to my country's farmland, there are problems such as excessive reduction in yield, excessive use of farmland, and high cost, and are not completely suitable for fertilizer pollution control in rice fields in my country.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Purification method of drainage outside rice field in estuarine area
  • Purification method of drainage outside rice field in estuarine area
  • Purification method of drainage outside rice field in estuarine area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A representative paddy field was selected near the Taiping River in Panjin City, Liaoning Province as the experimental site.

[0032] Approach:

[0033] Reeds are planted at the bottom of the paddy field drainage branch ditch, and water hyacinth is planted on the ditch wall. The external drainage of the paddy field flows through in turn and then enters multiple nitrogen and phosphorus resistance control boxes distributed in an S-shaped distribution in the main drainage ditch of the paddy field, and then the external drainage flows through the plant floating bed; Finally, the reed wetland is introduced to purify, and then discharged into the river water body.

[0034] A total of 48 nitrogen and phosphorus resistance control boxes are set up in the canal. The specifications of the nitrogen and phosphorus resistance control boxes are 50cm×50cm×40cm (length×width×height). Four round holes with a diameter of 15cm are set on each surface except the bottom surface. It is spon...

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

No PUM Login to view more

Abstract

The invention belongs to the technical fields of surface source pollution control and water pollution biological treatment and particularly discloses a purification method of drainage outside a rice field in an estuarine area. Emergent plants are planted at bottoms of drainage trenches of the rice field; floating plants are planted on trench walls; the drainage outside the rice field passes through the drainage trenches and the trench walls in sequence and then flows to a nitrogen and phosphorus prevention and control box and a plant floating bed which are arranged on rice field drainage main canals so as to be treated; and then the drainage outside the rice field is introduced to a natural wet land so as to be purified and converged to rivers. By using the purification method, the traditional conditions are fully utilized, a large amount of land is not occupied, needed materials are easy to obtain, retaining effects to nitrogen and phosphorus are good, and meanwhile, a scenery effect is good.

Description

technical field [0001] The invention belongs to the technical field of non-point source pollution control and biological treatment of water pollution, and specifically relates to a method for purifying drainage from paddy fields in an estuary area. Background technique [0002] Hekou District is an important rice production area and high-quality rice production base in the country. It has the largest contiguous area of ​​rice fields in the country of 105,000 hectares, with an annual output of 980,000 tons of rice. However, due to the dense river network in the estuary area, the nitrogen and phosphorus produced in the rice production process can enter the surface water system of the river network through leaching and runoff. It is estimated that the annual discharge of nitrogen is 3185 tons, and the annual discharge of phosphorus is 41.2 tons. Driven by the complex hydraulic transport mechanism of the river network, these pollutants eventually flow into the river, seriously a...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 迟光宇马建史奕陈欣
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap