Abstract: Three odd bacteria named TM₁, TM₂ and TM₃ were screened from the soil contaminated by thiuram in a landfill of a rubbermanufactured factory and then these bacteria were added into the water with a certain concentration of thiuram. Experimental results show the best conditions with the highest ability to degrade thiuram and TM₁ has the highest ability to degrade thiuram among the three bacteria. The four new bacteria ( T₁,T₂,T₃ and T₄) mixed with the three odd bacteria by a certain form have been used to study the ability of degrading thiuram under the former optimized conditions,and the T₁ mixed bacteria has the highest ability with degrading rate of thiuram of 95.77%.

Key words: screening, thiuram, degrading bacteria