U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

EVALUATION AND OPTIMIZATION OF A NEW MICROBIAL ENHANCEMENT PLUG-FLOW DITCH SYSTEM FOR THE PRETREATMENT OF ACID MINE DRAINAGE: SEMI-PILOT TEST
Song, Y., H. Wang, J. Yang, L. Zhou, J. Zhou, and Y. Cao.
RSC Advances 8:1039(2018)

A novel microbial enhanced plug-flow ditch reaction system was developed for pretreatment of AMD at semi-pilot scale. The pilot was used to examine system stability under different hydraulic retention times (HRTs) and to compare the effects of microbe-enhanced/lime-neutralization technology and direct lime neutralization. The bio-oxidation efficiency of Fe2+ (5 g/L) reached 100% in some parts of the system when HRT was 3 and 2 days, and the time taken to reach steady state was 6 and 4 days, respectively. When the HRT was 1 day, the reaction system operated for 4 days before equilibrium was lost. At the optimum HRT (2 days) and after the system was stable, the average precipitation rate of total Fe was 53.62% and the average removal rate of As(III) was 17.27%. Following microbial enhanced pretreatment, the amount of lime required and waste residues generated for AMD neutralization decreased by 75% and 85.25%, respectively. http://pubs.rsc.org/en/content/articlepdf/2018/ra/c7ra10765j



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.