Preparation method and application of microbial immobilized composite particles

A technology of microbial immobilization and composite particles, which is applied in the field of environmental bioremediation, can solve the problems of polyvinyl alcohol adhesion and poor mass transfer performance, and achieve the effects of improving removal effect, promoting adsorption and decomposition, and increasing specific surface area
CN114540337APending Publication Date: 2022-05-27SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2022-05-27

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Abstract

The invention relates to the field of environmental bioremediation, in particular to a preparation method and application of microbial immobilized composite particles. The preparation method comprises the following steps: S1, washing, drying and heating a biomass material for reaction, washing the biomass material with inorganic strong acid, and then drying, grinding and sieving the biomass material to obtain biochar; s2, culturing a Chryseobacterium strain, centrifuging, washing, resuspending to obtain a bacterial suspension, and adding the charcoal to obtain a mixed solution; heating and dissolving polyvinyl alcohol and sodium alginate, sterilizing, and adding the mixed solution to obtain an embedding solution; dissolving calcium chloride and boric acid in water to obtain a crosslinking solution; s3, dropwise adding the embedding liquid into the cross-linking liquid, and washing after reaction to obtain the microbial immobilized composite particles. The prepared microbial immobilized composite particles have the advantages of good mass transfer performance, good mechanical performance, large specific surface area and the like, and have a good degradation effect on neonicotinoid pesticides in water.
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Description

technical field

[0001] The invention relates to the field of environmental bioremediation, in particular to a preparation method and application of a microorganism-immobilized composite particle. Background technique

[0002] Neonicotinoids are systemic neuroactive insecticides. It kills insects by blocking the normal conduction of the central nervous system of insects. It is widely used in the control of insect pests such as vegetables and fruits, food crops and human settlements. It is the most widely used class of insecticides in the world. Neonicotinoids are persistent, migratory and bioaccumulative, and can cause extremely serious effects on the endocrine, respiratory, reproductive and nervous systems of non-target organisms (such as bees, birds, aquatic organisms and humans). Potentially carcinogenic, mutagenic and teratogenic. During use, neonicotinoid pesticides can enter the sewage treatment system through runoff rainwater and domestic sewage, or be directly disch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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