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Fermentation and Immobilization of Insect-Derived Deltamethrin-Degrading Strain, Microbacterium sp
Zhengyan Wang1, Qiong Luo1, Yifan Liu1
1School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China.
Insects
|January 28, 2026
Summary
A bacterial strain, Microbacterium sp., effectively removes deltamethrin, a pesticide contaminant. Immobilizing the bacteria in calcium alginate microspheres enhances its removal efficiency and reusability for environmental bioremediation.
Area of Science:
- Environmental Microbiology
- Bioremediation
- Pesticide Degradation
Background:
- Extensive agricultural use of deltamethrin leads to significant environmental contamination.
- Negative impacts on environmental and public health necessitate effective remediation technologies.
- Microbial degradation offers a promising avenue for deltamethrin bioremediation strategies.
Purpose of the Study:
- To investigate the deltamethrin removal capability of Microbacterium sp. isolated from Tribolium castaneum.
- To enhance the deltamethrin removal efficiency and environmental tolerance of Microbacterium sp. through immobilization.
- To evaluate the potential of immobilized Microbacterium sp. for deltamethrin-contaminated environment remediation.
Main Methods:
- Isolation and identification of Microbacterium sp. from Tribolium castaneum gut.
- Optimization of bacterial growth conditions (media, pH, temperature, agitation).
- Immobilization of Microbacterium sp. using sodium alginate and calcium chloride to form calcium alginate microspheres (CAMs).
- Assessment of deltamethrin removal by free and immobilized bacteria in liquid media and contaminated soil/water.
- Evaluation of immobilized bacteria reusability and ultrastructure analysis.
Main Results:
- Microbacterium sp. demonstrated significant deltamethrin removal (45.7% in 64h).
- Optimal growth conditions for Microbacterium sp. were identified.
- Immobilized Microbacterium sp. (CAMs) exhibited enhanced deltamethrin removal compared to free bacteria.
- CAMs retained over 50% removal efficiency after five reuse cycles.
- Immobilized bacteria showed 1.4 times higher removal rates in contaminated water/soil than free bacteria.
Conclusions:
- Microbacterium sp. is a potent agent for deltamethrin degradation.
- Immobilization in CAMs significantly improves deltamethrin removal efficiency and bacterial reusability.
- CAMs-based Microbacterium sp. shows great potential for practical bioremediation of deltamethrin-contaminated environments.
Keywords:
Microbacterium sp.biodegradedeltamethrinenvironmental remediationimmobilizationsodium alginateMore Related Videos
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