Influences of Providing Substances on Trichloroethylene Degradation of Bioremediation through Methane

Influences of some providing substances on trichloroethylene (TCE) degradation of bioremediation through methane were studied. Three soil column tests were conducted to evaluate influences of methane concentrations, dissolved oxygen (DO) concentrations, inorganic nutrients concentrations, and hydrogen peroxide concentrations. In Test 1, influences of methane and DO concentrations were studied. A test column providing 5 mg · l-1 of methane and 20 mg · l-1 of DO showed highest TCE removal rate in this test. In Test 2, influences of inorganic nutrients were studied. It was excessive to provide 30 mgNO3 · l-1 and 20 mgPO4 · l-1 as inorganic nutrients for biostimulation. In Test 3, influences of hydrogen peroxide concentrations on TCE removal rate were investigated. There were no influences on TCE removal rate in test column provided hydrogen peroxide until 50 mg · l-1. From these results, the suitable operating conditions were investigated for bioremediation of the TCE-contaminated groundwater through methane.