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首页> 外文期刊>Journal of material cycles and waste management >Biodegradation of oil tank bottom sludge using a new two‑phase composting process: kinetics and effect of different bulking agents
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Biodegradation of oil tank bottom sludge using a new two‑phase composting process: kinetics and effect of different bulking agents

机译：使用新的两阶段堆肥工艺对油箱底部污泥进行生物降解：动力学和不同填充剂的作用

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In this study, the effect of adding various bulking agents on the performance of a two-phase composting method in bioremediation of petroleum compounds from oily sludge was surveyed. The utilized system included the primary stage composting (PSC) using 6 windrow piles and the secondary stage composting (SSC) using 6 in-vessel bioreactors. Various amounts and combinations of immature compost, mature compost, and green waste were blended with oil tank bottom sludge (OTBS). Then, the mixture was added to the PSC and SSC experiments and composted for a period of 12 and 6 weeks, respectively. The results showed that the degradation percentages of total petroleum hydrocarbons in the PSC and SSC experiments were 63.56-84.50% and 57.59-88.95%, respectively. The removal efficiency reached through the two-phase system was higher than that of the single-stage process. Biodegradation was fitted to the first- and second-order kinetic with the rate constants of 0.076-0.389 day(-1) and 0.006- 0.176 g kg(-1) day(-1), respectively. The bacteria identified from the composting mixtures were Bacillus sp., Pseudomonas sp., Staphylococcus sp., and Klebsiella sp. It was concluded that the two-stage composting system, as an inexpensive and efficient method, is practically applicable for remediation of OTBS.
机译：在这项研究中，调查了添加各种填充剂对两相堆肥方法对油性污泥中石油化合物的生物修复性能的影响。所利用的系统包括使用6个堆肥堆的初级堆肥（PSC）和使用6个容器内生物反应器的次级堆肥（SSC）。将各种数量和组合的未成熟堆肥，成熟堆肥和绿色废料与油箱底部污泥（OTBS）混合。然后，将混合物加入PSC和SSC实验中，并分别堆肥12周和6周。结果表明，在PSC和SSC实验中，总石油烃的降解百分比分别为63.56-84.50％和57.59-88.95％。通过两相系统达到的去除效率高于单级工艺。生物降解适合一级和二级动力学，速率常数分别为0.076-0.389 day（-1）和0.006-0.176 g kg（-1）day（-1）。从堆肥混合物中鉴定出的细菌是芽孢杆菌属，假单胞菌属，葡萄球菌属和克雷伯菌属。结论是，两阶段堆肥系统作为一种廉价且有效的方法，实际上可用于OTBS的修复。

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