Abstract:

The typical petroleum and oil-contaminated saline-alkali soil were chosen as samples. Aboriginal microorganisms were isolated from petroleum-contaminated soils at the oilfield test site. Microbial degradation characteristics of petroleum pollutants were studied in simulations under different conditions. Experimental results show that degradation rates of micro-organisms were high in samples under the conditions of 50% water rate and 10∶1 N/P ratio. In addition, the microbial activity and degradation ability can be enhanced by using moderate H₂O₂ to improve the oxygen content in the samples. If suitable conditions can be provided, degradation and selective consumption of microbes for paraffins can be effectively increased, and used for molecular markers of petroleum pollution.

Key words: aboriginal-microbe; petroleum pollutant; saline-alkali soil; degradation