Application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies

A technology for black and odorous water bodies and submerged plants, applied in biological water/sewage treatment, water/sludge/sewage treatment, applications, etc., can solve problems such as light intensity affecting the growth of aquatic plants and water quality deterioration

Active Publication Date: 2021-04-23
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the deterioration of the water quality of polluted water bodies, the high concentration of pollutants in the bottom mud, and the low light intensity at the bottom mud interface will affect the growth of aquatic plants, especially the growth of submerged plants.
At present, there are no reports about submerged plants that are suitable for growing directly on the bottom mud of black and odorous water bodies

Method used

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  • Application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies
  • Application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies
  • Application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies

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Experimental program
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Effect test

Embodiment 1

[0043] Domestication of Sagittarius dwarf plants adapted to the conditions of black and odorous bottom mud.

[0044] In August 2016, the black and odorous sediment in the river channel was collected in the Pingshan River, a black and odorous water body in Shenzhen, and the rice was collected in the Experimental Farm of the Key Laboratory of Agricultural Ecology and Rural Environment of Guangdong Province General College of South China Agricultural University (near Cencun Bridge, Tianhe District, Guangzhou) Soil (rice paddy has been cultivated continuously for more than 5 years), and the growth substrate for domestication is prepared: add the black and odorous bottom mud collected from the river to the paddy soil, and mix the two evenly. The growth substrates with sediment contents of 30%, 50%, and 70% (volume ratio) were prepared. Adaptation and domestication of rice field weeds to black and odorous river sediments.

[0045] Paddy field weeds were selected as the Arthroatia d...

Embodiment 2

[0051] Growth of domesticated Sagittarius dwarf plants in simulated black and odorous water body and its improvement on overlying water and sediment pollution

[0052] In May 2017, the black and smelly bottom mud in the river was collected in the Pingshan River, a black and smelly water body in Shenzhen, and nine 60L plastic drums were placed on the open-air balcony on the ninth floor of South China Agricultural University. The bottom mud was put into the bucket and spread 15cm thick.

[0053] Domesticated and well-growing Sagittarius dwarfs were selected and transplanted in 6 plastic drums (the seedlings were collected from four paddy fields near Xijiang River Basin, Beijiang River Basin and Huanong in Guangdong). The buckets without transplanting plants were used as the blank group. At the beginning, because the root system of Arthia sativa was not firmly established in the bottom mud, a small amount of tap water was added, and more water was added after 1 to 2 weeks. The wa...

Embodiment 3

[0064] Growth of domesticated Sagittarius dwarf plants in simulated black and odorous water body and its improvement on overlying water and sediment pollution

[0065] In July 2017, black and smelly sediment was collected from a river in Shuibei Village, Shipai Town, Dongguan. The river is connected to the Dongjiang River, and the gate is usually closed. Only when heavy rainfall causes excessive water volume, the gate will be opened to release water. Therefore, it is basically a stagnant river. Due to years of domestic and factory sewage, the river is black and smelly. The contents of volatile sulfides, ferrous iron and ammonia nitrogen in the river sediment are 1500.45mg / kg, 5.1g / Kg and 90.12g / Kg respectively. The sediment collected from this section of the river is used for experiments, and the method is basically the same as that of the actual case. However, only 3 seedlings were set in the plant group (collected from the Xijiang River Basin, Beijiang River Basin and a pad...

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Abstract

The invention discloses the application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies. The present invention is based on the discovery by the inventors of the present invention that weed-like submerged plants such as sagittaria dwarfia can grow in the bottom mud of black and odorous water bodies, and the growth is good, and the total phosphorus in the bottom mud and the overlying water is also affected. , ammonia nitrogen, sulfide, and ferrous iron have a certain ability to remove, and the inventions made. Submerged plants like weeds in rice fields can grow in the bottom mud of black and odorous water bodies, and can reduce the total phosphorus, ammonia nitrogen and sulfide in the bottom mud, so that it is not necessary to remove the bottom mud when treating black and odorous water bodies, greatly reducing manpower and material resources usage of.

Description

technical field [0001] The invention belongs to the technical field of treatment of polluted bottom mud, and in particular relates to the application of weed-like submerged plants in paddy fields in the treatment of black and odorous water bodies. Background technique [0002] Black and odorous water treatment is an urgent task in my country's water pollution control. The black and odorous water body is mainly the result of the imbalance of oxygen supply and oxygen consumption in the water body caused by excessive pollution. Exogenous sewage brings a large amount of organic matter, which can easily lead to the anaerobic state of the sediment. Anaerobic microorganisms use the sulfide and ferrous metals formed by the metabolism of organic matter , organic amines and other black and odorous reduced substances are the main cause of black and odorous water, so intercepting sewage and treating sediment rich in endogenous pollutants, and re-establishing the interface environment of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32A01G22/00
CPCA01G22/00C02F3/32
Inventor 种云霄陈志远高帅强卢玉婵余光伟李梅李慧珊林月锦
Owner SOUTH CHINA AGRI UNIV
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