| Popis: |
The pilot scale biopile system was designed and operated for evaluation of bioremediation efficiency for petroleumcontaminated soil. The pilot scale biopile consisted of biopile dome, aeration system and monitoring system and twobiopiles were operated with nutrients and inoculum for more 100 days. The test pile A and B were analyzed with regard topH, total carbon contents, water contents, nutrients (N, P) and TPH. The initial TPH concentrations for pile A and pile Bwere about 10,000 mg/kg and 2,300 mg/kg, respectively. After 100 days, the TPH contents decreased about 70% in thepile A and 30% in the pile B. Also, n-C 17 /pristane and n-C 18 /phytane ratios in all pile were significantly changed. Themicrobial densities in the pile A was increased by approximately 10 7 CFU/g-soil~10 8 CFU/g-soil, but there was almost nochanged in the pile B. The average biodegradation rates were calculated about 66.8 mg/kg-day in the pile A and 10.9 mg/kg-day in the pile B. Over the course of operation period, pile temperature was considered the major limiting factor for theefficiency of all biopiles. Key words :Biopile, Petroleum contaminated soil, TPH, Biodegradation |
