辽河油田石油污染土壤的2阶段生物修复

建立了污染土壤预制床处理工程,对不同类型原油污染土壤分别进行堆腐处理,历时2个阶段,共运行210d.当稀油、稠油、特稠油和高凝油污染土壤中石油烃总量(TPH)为25.8～77.2g·kg^-1时,经过53d(为第1阶段)的运行,TPH去除率38.37%～56.74%.第2年(为第2阶段)继续处理156d,TPH降解率达到66.59%～80.96%.连续运行结果表明,污染土壤中易分解的石油烃污染物大部分在第1阶段得到降解,第二阶段降解率明显降低.

Two Phases Bioremediation of Oil Contaminated Soil from Liaohe Oil Field

A treatment engineering of prepared bed was set up for the bioremediation of oil contaminated soil with oil in this study, soils contaminated with different type of oils were treated using composting process in the prepared bed and the treatment period was divided into 2 phases with total time of 210 days. When the concentration of total petroleum hydrocarbons (TPH), which consist of thin oil, high condensation oil, special viscous oil, and viscous oil, were in the range of 25.8-77.2 g.kg-1 dry soil, petroleum removal rates can reach 38.37%-56.74% by 53 days operation. In the second phase, total petroleum removal rates reached 66.59%-80.96% by the 156 days operation in the next year. The results showed that most hydrocarbon pollutants that are easier to be degraded were removed in the first phase, the remedying efficiency obviously dropped in the second phase.