Marín José A, Moreno José L, Hernández Teresa, García Carlos
Department of Soil and Water Conservation and Waste Management, CEBAS-CSIC, Espinardo, Murcia, Spain.
Biodegradation. 2006 Jun;17(3):251-61. doi: 10.1007/s10532-005-5020-2.
The present work attempts to ascertain the efficacy of low cost technology (in our case, composting) as a bioremediation technique for reducing the hydrocarbon content of oil refinery sludge with a large total hydrocarbon content (250-300 g kg(-1)), in semiarid conditions. The oil sludge was produced in a refinery sited in SE Spain The composting system designed, which involved open air piles turned periodically over a period of 3 months, proved to be inexpensive and reliable. The influence on hydrocarbon biodegradation of adding a bulking agent (wood shavings) and inoculation of the composting piles with pig slurry (a liquid organic fertiliser which adds nutrients and microbial biomass to the pile) was also studied. The most difficult part during the composting process was maintaining a suitable level of humidity in the piles. The most effective treatment was the one in which the bulking agent was added, where the initial hydrocarbon content was reduced by 60% in 3 months, compared with the 32% reduction achieved without the bulking agent. The introduction of the organic fertiliser did not significantly improve the degree of hydrocarbon degradation (56% hydrocarbon degraded). The composting process undoubtedly led to the biodegradation of toxic compounds, as was demonstrated by ecotoxicity tests using luminescent bacteria and tests on plants in Petri dishes.
本研究旨在确定低成本技术（在我们的案例中为堆肥）作为一种生物修复技术，在半干旱条件下降低总烃含量较高（250 - 300 g kg(-1)）的炼油厂污泥中烃含量的效果。油污泥产自西班牙东南部一家炼油厂。所设计的堆肥系统包括露天堆肥，并在3个月内定期翻堆，结果证明该系统成本低廉且可靠。研究还探讨了添加膨松剂（木屑）以及向堆肥中接种猪粪（一种液体有机肥料，可为堆肥添加养分和微生物量）对烃类生物降解的影响。堆肥过程中最困难的部分是保持堆肥中合适的湿度水平。最有效的处理方式是添加膨松剂的处理，3个月内初始烃含量降低了60%，而未添加膨松剂的处理仅降低了32%。添加有机肥料并未显著提高烃类降解程度（烃类降解率为56%）。堆肥过程无疑导致了有毒化合物的生物降解，这通过使用发光细菌的生态毒性测试以及培养皿中植物测试得到了证实。
