Abstract
A multi-media bio-PRB reactor was designed to treat groundwater contaminated with petroleum hydrocarbons. After a 208-day bioremediation, combined with the total petroleum hydrocarbons content in the groundwater flowed through the reactor, microbiological characteristics of the PRB reactor including microbes immobilized and its dehydrogenase activity were investigated. TPH was significantly reduced by as much as 65% in the back of the second media layer, whereas in the third layer, the TPH content reached lower than 1 mg l − 1. For microbes immobilized on the media, the variations with depth in different media were significantly the same and the regularity was obvious in the forepart of the media, which increased with depth at first and then reduced gradually, while in the back-end, the microbes almost did not have any variations with depth but decreased with the distance. The dehydrogenase activity varied from 2.98 to 16.16 mg TF L − 1 h − 1 and its distribution illustrated a similar trend with numbers of microbial cell, therefore, the noticeable correlation was found between them.
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Liu, H., Zhang, L., Deng, H. et al. Microbiological characteristics of multi-media PRB reactor in the bioremediation of groundwater contaminated by petroleum hydrocarbons. Environ Monit Assess 181, 43–49 (2011). https://doi.org/10.1007/s10661-010-1811-y
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DOI: https://doi.org/10.1007/s10661-010-1811-y