Total coliforms are a group of facultative anaerobic Gram-negative sporeless bacteria that can ferment lactose, produce acid and gas, requiring oxygen. In this paper, it adopts three methods namely multi-tube fermentation method, membrane filter method and paper strip method to make analytic comparison on the total coliforms in drinking water. It also makes comparative study from aspects, i.e. test principle and procedure, scope of application and test result, discusses the advantages and disadvantages of the three methods. According to the result, compared with the traditional fermentation method and the membrane filter method, the paper strip method has the advantages such as simple operation, short test time and high accuracy, etc.
Petroleum pollution has become a well concerned environmental problem. Renovating and controlling the petroleum pollution is an important guarantee to recover the environmental function. In recent years, the effect of bioremediation technology in eliminating petroleum pollution has been concerned by people gradually, of which, the effect of microorganism is the most important part. The paper discusses the source of petroleum pollution, the hazard of petroleum pollution, bioremediation mechanism and bioremediation technology of petroleum pollution and prospects the development trend and application of microorganism in renovating water in the petroleum pollution.
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