He Yi-Liang, Hughes Joseph B, Sung Soohan
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
Huan Jing Ke Xue. 2007 Mar;28(3):613-6.
A pilot-scale system consisting of a soil biodegradation tank, a denitrification tank, and a recirculating feeding tank was designed and applied to study the biodegradation of 2,4- and 2,6-dinitrotoluene in soil contaminated with the explosives. The experimental results showed that 2, 4- and 2, 6-DNT can be degraded completely by native DNT degrading bacteria existing in the contaminated soil, despite water temperatures as low as 8 degrees C to 15 degrees C. Compared to 2,4-DNT, the biodegradation of 2,6-DNT was much slower and took much longer time. The alkalinity and nutrient needs of the bacteria were supplied by the soil with no additional amendments required. The denitrification system played an important role in preventing nitrite inhibition of DNT biodegradation, but it was necessary to supply an additional carbon source to ensure complete nitrite removal.
设计并应用了一个中试规模的系统，该系统由一个土壤生物降解池、一个反硝化池和一个循环进料池组成，用于研究在受炸药污染的土壤中2,4-二硝基甲苯和2,6-二硝基甲苯的生物降解。实验结果表明，尽管水温低至8摄氏度至15摄氏度，但受污染土壤中存在的天然二硝基甲苯降解细菌能够完全降解2,4-二硝基甲苯和2,6-二硝基甲苯。与2,4-二硝基甲苯相比，2,6-二硝基甲苯的生物降解要慢得多，所需时间也长得多。细菌的碱度和养分需求由土壤提供，无需额外添加。反硝化系统在防止亚硝酸盐对二硝基甲苯生物降解的抑制方面发挥了重要作用，但有必要额外提供碳源以确保亚硝酸盐的完全去除。
