微生物强化处理与堆制强化处理含油污泥对比试验

为探索含油污泥的高效处理方法,对含油量为12.68%的污泥进行微生物菌剂强化处理和堆制强化处理现场试验.在第1、15、30d分别向微生物强化处理单元投加微生物菌剂和营养液;同时向堆制强化单元投加10kg畜禽粪便来提供共降解物质,强化堆制处理过程.结果表明,微生物强化处理单元含油量持续下降,56d后下降至6.42%,去除率达到47%;强化堆制单元处理效果较好,56d后含油量下降至6.98%,去除率达到31%;对照单元含油量则变化很小,56d后含油量为10.15%.对照单元的pH基本保持不变,最高为8.28,最低为7.93,微生物强化处理单元pH最低达到7.33,一般稳定在7.8左右,菌剂的添加对pH影响明显.堆制强化处理单元温度随着农家肥的添加而剧烈升高,最高达到54℃.试验进行过程中监测了样品中微生物总数的变化情况.通过气谱-质谱分析,可以明显地看出2种方法处理后,含油污泥中石油成分的差异,对碳原子数小于21的烃类有着良好的去除效果.

Field-Scale Study on Performance Comparison of Bio-Augmentation and Compost Treatment of Oily Sludge

In order to explore better treatment process of oily sludge, the field scale experiments were conducted using the sludge containing 12.68% oil. The performance of microbe preparation bio-augmentation (MPB) and compost treatment with manure (CTM) was compared. For the first experiment, 10 L solution containing 150 g microbe preparations and the nutrition were sprayed onto the MPBC cell. The initial oil content of final mixture amounted to 12.12%. The initial oil content of CTM after final mixture approximated to 10.14%. During the experimental period, same quantities of the microbe preparation and nutrient solution were sprayed on MPB at the 15th and 30th day separately. At the same days, the 10 kg manure was added to CTM cell. The degradation effect of MPB was more obvious, oil content dropped to 6.42% with a 47% removal rate of oil. The oil content in control decreased slightly to 10.15% after 56 days, while in CTM it fell down to 6.98% with a total removal rate of 31%. The pH in control fluctuated slightly between 8.28 to 7.93 while that in MPB, from 7.33 to 8.08, which might due to the addition of microbe preparation. The microbial count was analyzed weekly, which represented the adaptation ability of microbe in sludge. Temperature of compost increased rapidly up to 54 degrees C in the presence of manure. The differences of two kinds of methods were identified by GC-MS and the hydrocarbons with less 21 carbons were degraded easily.