Low-salinity water body purification method

A technology for water purification and low salinity, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. To achieve the effect of improving purification capacity, improving salt tolerance, and solving eutrophication problems

Inactive Publication Date: 2015-06-03
SHANGHAI TAIHE WATER ENVIRONMENTAL TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing treatment methods for urban eutrophication water bodies have defects such as relatively single measures, slow recovery of the ecosystem after implementation, and difficulty in long-term maintenance. It is difficult to fundamentally solve the problem of eutrophication in low-salinity water bodies

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] Combination of air-dried hornwort+Skinweed, foxtail algae+bladderwort, Erythrina galeria+Nyrella+elodea (the proportion of Erythrina galeria is 50%~60%, and the proportion of Nymphella The proportion is 20% to 30%, and the proportion of Elodea is 20% to 30%) Seeds are soaked in warm water for 10-20 minutes; rinsed with water for 2-3 times, and sterilized with 4% formalin for 60 minutes; Rinse with clean water, soak, and set aside. The bottom material is the bottom mud in the park channel. Prepare salt water with 0.35% and 0.8% salinity with NaCl. Soil cultivation was used in the experiment. A 10cm-thick substrate was first laid in the tank, and then 30cm of prepared salt water was slowly injected along the tank wall. Tap water with a salinity of 0 was used. The seeds were cultured for 45 days, during which the germination rates were counted on the 10th, 20th, and 30th days, and the germination rates of different combinations of seeds were compared to determine whether...

Embodiment 2

[0031] Project implementation: The ecological restoration area is 960 meters long, 40 meters wide, and covers an area of ​​41,000 square meters. Most of the surrounding river banks are hard masonry banks, which are concrete ecological slope protection types, and the natural attributes and water purification functions of the coastal zone are affected to a certain extent; there are almost no large aquatic plants growing in the whole lake, the biological community structure is simple, and the algae biomass is high. , the water transparency is low, 40-50cm, with primary eutrophication. The salinity is often maintained at 0.2-0.8%, which has a certain inhibitory effect on the growth of many submerged plants. However, the submerged plants with the combination of "Littleweed+Citella+Elodea" established an ecological community in the river channel (the proportion of the combination is 50%-60%, and the The proportion of the water body is 20% to 30%, the proportion of Elodea is 20% to ...

Embodiment 3

[0037] In the test base, we conducted low-salinity water treatment experiments with Erythrina chinensis, S. chrysalis, and Elodea. Taking the local river water inferior to Category 5 as the background water quality, we planted E. galerygium, S. chrysalis, and Elodea to conduct control experiments. The test results of the inferior five types of river water (based on the "National Surface Water Environmental Quality Standard" (GB3838-2002)) show that the ecosystem water purification effect of a single or any two submerged plants is far inferior to that of the three submerged plants. Purification efficiency of water plant combination. Among them, the comparison of the pollutant removal rate in the control test is shown in the following table:

[0038] Table 2 Contrast table of purification efficiency of pollutants in the control test of Erythrina fragrans+Nyrella chinensis+Elodea plant combination

[0039] plant mix

[0040] Nymphella

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Abstract

The invention relates to the technical field of water body ecological restoration, and in particular relates to a low-salinity water body purification method and an application thereof. The low-salinity water body purification method comprises the following steps: planting all-grass of spiral wildcelery, najas minor, and elodea nuttallii as a submerged plant combination in a low-salinity water body to establish an ecological community. By utilizing the special combination provided by the invention, the salt resistance of the submerged plant can be improved, and a problem that a single plant has poor salt resistance is solved; and furthermore, a salt-resistance ecological system is formed, the purification capability to the low-salinity water body is improved, and the transformation of the water body from eutrophication to oligotrophication is achieved.

Description

technical field [0001] The invention relates to the technical field of water body ecological restoration, in particular to a low-salinity water body purification method and its application. Background technique [0002] With the rapid development of urban industrialization and urbanization, the city scale and population pressure continue to expand, and the environmental load increases, making the water quality of urban water bodies worse and worse. It has become an important part of urban construction to increase the prevention and control of urban landscape water pollution and restore the ecological functions of urban water. [0003] At present, the urban water pollution problem is mainly characterized by eutrophication of the water body, which is likely to cause blue-green algae outbreaks, resulting in the inhibition of the growth of aquatic plants and the appearance of algae-type turbid water bodies. The living environment of aquatic animals and plants is severely damaged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32C02F3/322Y02W10/10
Inventor 何文辉
Owner SHANGHAI TAIHE WATER ENVIRONMENTAL TECH DEV CO LTD
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