earticle

영어

Oil degradation agent was developed with organic sludge and modified peat moss(MPM) to recover oil contaminated soil. Waste sludge discharged from wastewater treatment plant of chemical plant in Ulsan National Industrial Park was used as organic sludge, and MPM was purchased. Organic sludge was adequate to use as growth medium for microorganism, the surface of MPM had porous structure which could enhance the cultivation condition of oil degradation microorganisms. Water contents and TPH variation with time were observed to investigate the degradation capacity of developed degradation agent. Water contents were rapidly decreased with higher content of MPM. Degradation capacity of TPH was increased with degradation time, however, the difference of MPM content did not affect to degradation capacity with time in the range of 5 to 25 percent of MPM. Therefore, it was recommended that the content of MPM for developing degradation agent was controlled to below 10% as mixing with organic sludge. For testing the recovering agent with pilot plant and field test, landfarming method was tried. Oil contaminated soil recovering agent was thought to contain more microorganisms than raw waste sludge and was no problem to come onto the market because there did no have any items of specified wastes. According to the results of TPH variation with time in the field test, it was observed the initial degradation velocity of oil with produced recovering agent was rapidly up to 50% after 4 days, remarkably. Because the microorganisms in the organic sludge discharged from chemical plant already acclimated with oil, therefore, it could be estimated initial degradation velocity of recovering agent might be rapid. It was concluded the oil contaminated soil recovering agent produced in this study have high marketability because of its two aspects on recycling of wastes and initial rapid degradation capacity.