MBBR处理油页岩干馏废水不同挂膜方式的性能比较

为实现生物膜反应器的快速启动和稳定运行，对MBBR处理油页岩干馏废水的不同挂膜驯化方法进行了优化。分别采用2种挂膜驯化方式进行:方法1先用模拟生活污水对填料进行挂膜，然后用以模拟生活污水稀释20倍的油页岩干馏废水对生物膜进行驯化；方法2直接采用模拟生活污水稀释20倍的油页岩干馏废水进行连续流挂膜驯化。实验结果表明:在相同运行阶段，方法2的生物膜量增长情况优于方法1，第35天方法1和方法2的生物膜量分别为941，1628 mg/L；从脱氮除碳情况来看，方法2启动和稳定运行所需的时间更短，处理效果也优于方法1；生物相及扫描电镜图像分析显示，与方法1相比，方法2中的生物膜结构更加紧实，微生物排列更为紧密、数量更多。因此，直接采用以模拟生活污水稀释20倍的油页岩干馏废水进行连续流挂膜驯化是MBBR处理油页岩废水的最佳启动方式。

COMPARISON OF DIFFERENT BIOFILM CULTURING METHODS IN MBBR FOR OIL SHALE RETORTING WASTEWATER TREATMENT

In order to realize the rapid start-up and stable operation of the biofilm reactor, comparative studies were conducted on different methods of biofilm culturing in the process of MBBR of oil shale retorting wastewater treatment. The experiment was carried out by two methods of filming and domestication. Method 1 was to film the filler with simulated domestic sewage, and then domesticate the biofilm by using the oil shale retorting wastewater diluted 20 times by the simulated domestic sewage; Method 2 directly used oil shale retorting wastewater diluted 20 times with simulated domestic sewage for continuous flow film domestication. The results showed that:in the same operation stage, the growth of biofilm in method 2 was better than that in method 1, and the biomass of method 1 and method 2 were 941 mg/L and 1628 mg/L respectively, on the 35 th day. From the perspective of nitrogen and carbon removal, the start-up and stable operation time of method 2 was shorter, and the treatment efficiency was also better than that of method 1; the biofacies and SEM images showed that compared with method 2, the biofilm structure in method 2 was more compact, and the arrangement of microorganisms was more closely and the number of microorganisms was lager. So directly adopting the oil shale retorting wastewater diluted 20 times with simulated domestic sewage to carry out continuous flow film domestication was proved to be the best starting method.