Method for purifying aquatic water by using microbes and plants in combination

Abstract

The invention discloses a method for purifying aquatic water by using microbes and plants in combination, which is characterized by comprising the following steps: (1), screening at least two kinds of avirulent microbes capable of denitrifying efficiently from the aquatic water or aquatic sludge by using an ammoxidation culture medium or a denitrification culture medium, mixing the two kinds of avirulent microbes, immobilizing the obtained microbial colonies on a carrier to complete the immobilization of the microbial colonies; (2) building a plant filter pond communicated with an aquatic pond, planting edible vegetables or forage grasses in the plant filter pond, filling the immobilizing carrier on which the microbial colonies are immobilized in a plastic mesh bag and putting the plastic mesh bag at the root of plants; and (3) building a closed circulation aquatic system and driving aquatic water circulation. The method has the advantages of overcoming the drawbacks of easy death and loss of floating microbes, low activity and low degradation efficiency, improving the purification efficiency and reducing the purification time of the aquatic water by using the synergistic effect between the plants and the microbes, and saving water source.

Description

technical field [0001] The invention relates to a method for purifying aquaculture water, in particular to a method for jointly purifying aquaculture water by using microorganisms and plants. Background technique [0002] At present, domestic aquaculture water purification methods are mainly to convert aquaculture wastewater through biofilm nitrification tanks to convert organic matter and ammonia nitrogen into relatively low-toxic nitrates, which can improve water quality to a certain extent, but this method can lead to Nitrate accumulates in a large amount in aquaculture water, and at the same time, it cannot remove other nutrients such as organic particles and inorganic phosphorus in aquaculture water. Therefore, in order to overcome the shortcomings of purifying aquaculture water through biofilm nitrification tanks, microorganisms and plants are usually used for joint purification. Aquaculture water. [0003] The existing method of using microorganisms and plants to joi...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic aquaculture water purification methods are mainly to convert aquaculture wastewater through biofilm nitrification tanks to convert organic matter and ammonia nitrogen into relatively low-toxic nitrates, which can improve water quality to a certain extent, but this method can lead to Nitrate accumulates in a large amount in aquaculture water, and at the same time, it cannot remove other nutrients such as organic particles and inorganic phosphorus in aquaculture water. Therefore, in order to overcome the shortcomings of purifying aquaculture water through biofilm nitrification tanks, microorganisms and plants are usually used for joint purification. Aquaculture water body

[0003] The existing method of using microorganisms and plants to jointly purify aquaculture water is mainly to cultivate plants in the form of floating islands in the aquaculture water body. The free microorganisms in the roots of the plants can effectively decompose the organic matter and ammonia nitrogen in the water body into nitrate, and decompose to obtain Nutrients such as nitrate and inorganic phosphorus are absorbed by the roots of plants, but the free microorganisms in the roots of plants have the disadvantages of easy death, loss, low activity, and low degradation efficiency, resulting in low purification efficiency and short duration of aquaculture water. question