降解三苯类复合微生物菌剂的制备及性能

将驯化后具备高效降解三苯类物质能力的活性污泥作为种泥,在特定的载体上发酵扩大培养,制成复合微生物菌剂.菌剂中的有效活菌数＞109CFU/g,含水量＜5%,可替代活性污泥直接投加,具有同驯化的活性污泥相当的降解性能.分别考察了pH值、烘干温度和载体比例对菌剂降解性能的影响,获得了菌剂制备的最佳工艺条件:pH值9.0,烘干温度35℃,麦麸:纤维素:稳定剂比例为85%:10%:5%.该菌剂具有较好的稳定性,可在4℃稳定保存3个月,仍保持对三苯类物质较高的去除效率,相对活性污泥更适合保存.

Preparation of BTX degrading composite microorganism agent

The activated sludge with high efficiency for the removal of benzene, toluene, and o-xylene (BTX) was inoculated on a specific carrier and enriched via a fermentation process. The composite microorganism agent applied for BTX degradation was then successfully prepared. In the microorganism agent, the active organisms was more than 109 CFU/g, and water content was less than 5%. The microorganism agent, instead of the acclimated activated sludge, could be employed for the start-up of the reactor to purify BTX without substantial loss of removal capacity. The effect of several operating parameters, including pH, drying temperature and the carrier proportion, on the performance of microorganism agent was investigated in detail. With an initial pH of 9.0, drying temperature of 35℃, and the carrier proportion of 85%: 10%: 5%, the best microorganism agent were obtained. Compared with the activated sludge, the microorganism agent had higher stability when it was stored for three months or more at 4℃.