Method for treating eutrophic seawater by compounding bacteria and chitosan

Abstract

The invention discloses a method for treating eutrophic seawater by compounding bacteria and chitosan. The preparation method comprises the following steps: inoculating bacillus subtilis, streptomycesjingyangensis, saccharomyces cerevisiae, lactobacillus bulgaricus and rhodopseudomonas palustris into a culture medium according to a certain proportion to carry out compound bacterium culture, detecting the activity of compound bacteria regularly, and selecting a compound bacterial colony with relatively high activity; cleaning shrimp shells for preparing chitosan with clear water, drying, soaking the raw materials in a diluted hydrochloric acid solution for 1-3 hours, filtering, and washing with water until the raw materials are neutral; putting the treated shrimp shells into a sodium hydroxide solution, boiling for 1-3h, continuously filtering, and washing with water to be neutral. According to the present invention, the water quality of the seawater can be purified to a certain degreethrough the chitosan, and the eutrophic seawater can be subjected to water quality balance adjustment through the mixing of the composite strain and the chitosan so as to rapidly decompose and degrade the rich organic matters and the rich mineral elements in the water body, such that the water body pollution is reduced, and the method is suitable for promotion.

Description

technical field [0001] The invention relates to the technical field of seawater treatment, in particular to a method for compounding eutrophic seawater with fungus-chitosan. Background technique [0002] Eutrophication refers to the large amount of nutrients such as nitrogen and phosphorus required by organisms entering slow-flowing water bodies such as lakes, estuaries, and bays, causing algae and other plankton to multiply rapidly, the dissolved oxygen in the water body decreases, and fish and other organisms die in large numbers. Phenomenon. A large number of dead aquatic organisms are deposited at the bottom of the lake, decomposed by microorganisms, and consume a large amount of dissolved oxygen, causing a sharp decrease in the dissolved oxygen content of the water body, deteriorating the water quality, affecting the survival of fish, and greatly accelerating the eutrophication process of the water body. When eutrophication occurs in the water body, due to the large nu...

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Problems solved by technology

[0003] Chitosan is the product of chitin after deacetylation reaction. The degree of deacetylation (D.D) determines the content of amine groups (NH2) on the macromolecular chain, and the increase of D.D will make chitosan In the dilute acid solution, the charged groups increase and the charge density of the polyelectrolyte increases, which will inevitably lead to changes in its structure, properties and performance. In the process of water quality treatment, chitosan can only purify the water quality, but cannot It carries out effective water eutrophication treatment, which leads to low efficiency of eutrophic seawater treatment. Therefore, we have designed a method of bacterial chitosan composite treatment of eutrophic seawater to solve the above problems

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