Why treat eutrophication with plants instead of microorganisms?

Cause: High content of nitrogen and phosphorus and other elements in water Countermeasures: A method of using aquatic organisms to absorb and use nitrogen and phosphorus elements for metabolic activities to remove nitrogen and phosphorus nutrients in the water body.

At present, some countries are experimenting with the purification of eutrophicated water bodies with large aquatic plant sewage treatment systems. Macrophytes include water hyacinth, Phragmites aurantifis, cattails, Canadian Hyalo, Rhizopus multispike, Algae, Broken copper coins and many other species, which can be selected and planted according to different climatic conditions and the nature of pollutants. The characteristics of aquatic plant purification of water body are that large aquatic plants are the main body, and the plants and root zone microorganisms coexist, producing a synergistic effect and purifying sewage.

Nitrogen, phosphorus and suspended particles are removed by direct plant absorption, microbial transformation, physical adsorption and sedimentation, and heavy metal molecules are also degraded. Aquatic plants are generally fast-growing and can be harvested and treated as fuel, feed, or fermented to produce biogas. This is an important measure to control the eutrophication of lake water at home and abroad.

Iris, cattail and calamus were planted in the river pond to eliminate eutrophication, iris and cattail could grow in three concentrations of eutrophicated water, and the growth of iris in high concentration water was affected, the removal rates of nitrogen and phosphorus in different concentrations of eutrophication water were different of these three plants, and the removal rates of total nitrogen from iris to three different eutrophication degrees were9%, calamus for

2%, 64 for cattails

3%;The removal rate of total phosphorus from the water body is iris5%, calamus for8%, cattail is6%。

Eutrophication with plants instead of microorganisms is a biological measure that uses specific organisms (plants, microorganisms or protozoa) to absorb, transform, remove or degrade environmental pollutants to achieve environmental purification and ecological restoration.

Eutrophication: It refers to a pollution phenomenon in which a large number of nutrients such as N and P enter the water body, causing the malignant proliferation of cyanobacteria, algae and other plankton, and eventually leading to a sharp decline in water quality.

Eutrophication is divided into natural eutrophication and artificial eutrophication.

When eutrophication occurs in a body of water, the surface of the water tends to appear blue, red, brown, milky white, etc., depending on the color of the dominant organism. It is called "red tide" in seawater and "bloom" in freshwater.

"Water blooms" and "red tides" are typical examples of eutrophication.

There are five main harms of eutrophication:

1. A large number of algae decay and die after a large number of reproductions, which provides a rich substrate for the growth of heterotrophic microorganisms, but the proliferation of aerobic microorganisms leads to a large consumption of dissolved oxygen in the water body, so that the fish and other aquatic animals in the water body face the threat of suffocation.

2. Many algae can produce toxins, which not only harm animals, but also have a serious impact on human health. Hepatocarcinoma.

3. Affect the water supply system and tap water quality of the water plant: excessive algae blooming, which greatly increases the treatment cost of the water plant, and at the same time causes the tap water to have an unpleasant smell.

4. Hazards of natural landscapes (1) The water body smells bad and smells; (2) Reduced transparency. Especially in tourist areas, it even loses its tourism function.

5. The eutrophication of water bodies will accelerate the decline of lakes and promote their evolution into swamp ecology.

There are many ways to do this:

1.Symbiosis: For example, the symbiotic bacteria in the root nodules of leguminous plants can produce some amino acids that leguminous plants cannot synthesize on their own, and leguminous plants provide nutrients for them;

2.Decomposition: Some microorganisms in the soil produce minerals needed for plant growth and development by decomposing organic nutrients in the soil, and at the same time, they also produce carbon dioxide for plants to photosynthesize by decomposing organic nutrients in the soil.

3.Insulation: The temperature of the soil with microorganisms is higher than that of the soil without microorganisms, the temperature is higher, the activity of enzymes is higher, and the use efficiency of roots is higher;

4.Temporary preservation: After the death of a microbial individual, the organic nutrients in its body are decomposed by other microorganisms and re-enter the soil for plant absorption and utilization.

Like nitrifying bacteria: converts ammonia into solid ammonia for plants to absorb.

Other bacteria break down the fertilizer to make CO2

There are many examples, and I will not list them all.

This is wrong.

Microorganisms consume organic matter in the soil, which cannot be directly absorbed and utilized by plants. Only after the decomposition of microorganisms can it be absorbed and utilized by plants into some small molecule inorganic substances. So it should be changed to:

The microorganisms in the soil provide a large amount of nutrients needed by plants, which is beneficial for plant growth.

Upstairs said it was too serious (referring only to nitrogen fixation).

Plants absorb water, inorganic salts, oxygen, etc. from the soil.

Microorganisms cannot be said to be absorbed by plants, some of them may be harmful to plants, these are microbial invasions, and some are mutually beneficial and symbiotic with plants, like rhizobia of leguminous plants, they have nitrogen fixation (absorbing N2 in the air and converting it into ammonia nitrogen that plants can absorb) for plants to use, but without them, plants can also grow, like urea ammonia nitrogen can be directly absorbed by plants. Microorganisms participate in the end of the biological chain plays an important role, and if they are all killed, plants will not survive, and animals will not survive.