Artificial wetland system suitable for removing agricultural residual organic pesticides in karst regions

A constructed wetland system and organic pesticide technology, applied in the field of sewage treatment, can solve the problems of poor adaptability, non-point source pollution of pesticides, slow pollutant enrichment/purification speed, etc., and achieve low cost, good enrichment and plant absorption and degradation. , the effect of improving the adaptability of geological conditions

Pending Publication Date: 2021-03-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Foreign research and surveys show that in order to solve the problem of non-point source pollution from pesticides in North America and Nordic countries, constructed wetlands are widely used to treat polluted rivers, but the plants selected in constructed wetlands generally have poor adaptability to calcium-rich and high-alkali soil Concentration / purification speed is slow and other disadvantages

Method used

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  • Artificial wetland system suitable for removing agricultural residual organic pesticides in karst regions
  • Artificial wetland system suitable for removing agricultural residual organic pesticides in karst regions
  • Artificial wetland system suitable for removing agricultural residual organic pesticides in karst regions

Examples

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Effect test

Embodiment 1

[0036] A Vertical Underflow Constructed Wetland System for Treating Organic Pesticides

[0037] The small-scale simulated vertical flow submerged constructed wetland system is built in a cuboid aluminum container (specification: length × width × height = 1m × 0.5m × 0.6m), and a water outlet with a diameter of 2cm is set at a distance of 1cm from the bottom of the container. The water outlet is connected to the main water collection pipe for collecting water samples, and the perforated branch pipe is connected to the main water collection pipe in the shape of "non"; the diameter of the perforated pipe is 2cm, and the diameter of the hole on the perforated pipe is 0.5cm; and a 100-mesh filter cloth is used 3 layers of wrapping to prevent mud from clogging the water pipe, and a faucet is connected to the outside of the water outlet for drainage. In the middle of the container, a 300-mesh filter screen is used to separate two areas of the same volume (area specifications: length ...

Embodiment 2

[0049] A Vertical Underflow Constructed Wetland System for Treating Organic Pesticides

[0050] The vertical flow subsurface flow constructed wetland system is constructed in the natural wetland of a farmland in a village in Guilin City, and is designed as a multi-unit. The size and treatment process of the unit structure will be described below.

[0051] This unit system uses an excavated square tank as a processing container, the size of which is: length × width × height = 5m × 2.5m × 1.2m), and a water outlet with a diameter of 10cm is set at a distance of 5cm from the bottom of the container, and the water outlet is connected to the water collection. pipe, used to collect water samples, the perforated branch pipe is connected to the water collection main pipe in the shape of "non"; the diameter of the perforated pipe is 10cm, and the diameter of the hole on the perforated pipe is 1.0cm; and wrapped with 3 layers of 100 mesh filter cloth, To prevent mud from blocking the w...

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Abstract

The invention provides an artificial wetland system suitable for removing agricultural residual organic pesticides in karst regions, and belongs to the technical field of sewage treatment. The artificial wetland system is sequentially provided with a pebble layer, a soil layer and a plant layer from bottom to top; a water inlet is formed in the top end of the artificial wetland system, and an effluent collecting system is arranged at the bottom of the artificial wetland system; the effluent collecting system comprises a plurality of perforated pipes with the diameter of 0.5-2 cm and a water collecting main pipe; the surface of each perforated pipe is coated with a filter screen; a water outlet of the water collecting main pipe is formed in the exterior of the artificial wetland system; oneor more of acorus calamus, canna indica, thalia dealbata and typha angustifolia are planted in the plant layer; the thickness ratio of the pebble layer to the soil layer is 1: (1.5-2.5). The artificial wetland system provided by the invention has strong adaptability to karst hydrogeological conditions, and has good enrichment and plant absorption and degradation effects on persistent organic pesticides.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an artificial wetland system suitable for removing agricultural residual organic pesticides in karst areas. Background technique [0002] Karst area, also known as karst landform area, is an area with obvious characteristics of calcium-rich and high-alkali (high carbonate concentration, high pH value). This area is the most widely distributed in my country, and it is concentrated in Guangxi, Guizhou, Yunnan and other provinces. , Sichuan, Chongqing, Hunan, Shanxi, Gansu, Tibet and other provinces and regions are also distributed. Due to the influence of geology and landforms in agriculture in karst areas, the removal of agricultural residues of pesticides is unique, and conventional purification technologies require special process design and treatment before they can be applied. [0003] Organochlorine pesticides (organochlorine pesticides, OCPs) is one of the typical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F101/30C02F101/36
CPCC02F3/32C02F2101/306C02F2101/36Y02W10/10
Inventor 曾鸿鹄梁延鹏朱宗强罗爽陆燕青覃礼堂莫凌云
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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