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The raw liquid and the bio-treatment（MBR） effluent of landfill leachate were irradiated using electron beam（EB） technology. The effect of EB irradiation on the molecular weight，organic composition of pollutants in the landfill leachate，as well as the improvement of biodegradability were investigated. Results showed that EB irradiation coupled with the coagulation process achieved a good COD removal of landfill leachate. Furthermore，the macromolecular organic pollutants（molecular weight >100 ku） in the leachate solution could be destroyed while some small molecular weight organics（molecular weight，0.5-1 ku） would be polymerized during the EB irradiation. Additionally，EB irradiation could effectively remove macromolecular humus in the bio-treatment effluent of the leachate and transform them to small molecular weight organic compounds which would enhance the biodegradability of the landfill leachate.

To study the effectiveness of electron-beam sterilization of medical waste, medical wastes were irradiated with different doses of an electron beam, and Bacillus pumilus and Bacillus atrophaeus were used as microbial indicators.Microbial counting was used to analyze the effects of the absorbed dose and medical waste material on the inactivation of microorganisms. The results showed that the absorbed dose was linearly correlated with the logarithm of the total number of viable microbial colonies; the D10 values of Bacillus pumilus and Bacillus atrophaeus were 2.45 kGy and 1.22 kGy,respectively.When the absorbed dose was 15 kGy, the killing logarithm of Bacillus pumilus and Bacillus atrophaeus on the medical waste simulants reached 6, thereby meeting the current technical requirements for the microwave and chemical disinfection of medical waste.