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首页> 外文会议>Sixth International in Situ and On-Site Bioremediation Symposium, 6th, Jun 4-7, 2001, San Diego, California >EFFECT OF SOIL CONTENT ON COMPOSTING OF DIESEL FUEL CONTAMINATED SOILS
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EFFECT OF SOIL CONTENT ON COMPOSTING OF DIESEL FUEL CONTAMINATED SOILS

机译：土壤含量对柴油燃料污染土壤组成的影响

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The purpose of this study was to investigate the effect of soil content on the thermophilic stage of composting. A total of thirty-six bench-scale biocell reactors were prepared. Each biocell started with 6.5 kg (wet basis) of biosolids and woodchips. The ratio of woodchips to biosolids used was 0.4:1 (wet basis) to achieve a target moisture content of 55%. Sand or silt was added to the biocells in increasing amounts. The amount of sand added in the compost mixture ranged between 0% to 64% on a wet weight basis, while the amount of silt ranged from 0% to 48% on a wet weight basis. Soils were contaminated with 5000 mg of diesel fuel per kg of dry soil before addition to biocells. Diesel-~(14)C octadecane mixture was also added to the reactors to trace the mineralization of hydrocarbon as ~(14)CO_2. The biocell aeration and temperature were monitored and controlled to simulate the thermophilic stage of composting. Each run lasted for 14-days. As a measure of composting microbial activity, the relative heat generation and volatile solids removal were measured. The results of this study indicated that thermophilic microbial activity was not affected by the sand or silt content tested. No significant release of ~(14)C as CO_2 from reactors was observed during the fourteen days of composting. It is expected that the production of ~(14)C would increase with increased composting time. While the thermophilic microbial activity observed was not affected with sand or silt content tested, further investigations are suggested to confirm our work with clay soil and to compare those results with other researchers.
机译：这项研究的目的是调查土壤含量对堆肥高温阶段的影响。总共准备了36个台式生物电池反应器。每个生物细胞均以6.5千克（湿基）的生物固体和木片开始。木片与生物固体的比例为0.4：1（湿基），以达到55％的目标水分含量。越来越多的沙子或淤泥被添加到生物细胞中。添加到堆肥混合物中的沙子量以湿重计为0％至64％，而淤泥的量以湿重计为0％至48％。在将土壤添加到生物细胞之前，每公斤干土壤被5000 mg柴油污染。柴油-〜（14）C十八烷混合物也被添加到反应器中，以追踪碳氢化合物〜（14）CO_2的矿化。监测和控制生物细胞的曝气和温度，以模拟堆肥的高温阶段。每次运行持续14天。作为堆肥微生物活性的量度，测量了相对热量的产生和挥发性固体的去除。这项研究的结果表明，嗜热微生物的活性不受所测试的沙子或泥沙含量的影响。在堆肥的第14天中，未观察到从反应器中以CO_2形式大量释放〜（14）C。预计〜（14）C的生产将随着堆肥时间的增加而增加。尽管观察到的嗜热微生物活性不受测试的沙或粉尘含量的影响，但建议进行进一步的研究以确认我们在粘土上的工作并将这些结果与其他研究人员进行比较。

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