Host: The Japan Society of Waste Management Experts
Recently, chemical oxidation method for landfill sites has been being developed, but by-products that are hard to be detected by chemical analysis can be produced by this method. Thus, toxicity tests can be useful tools for detecting the changes. This time, acute toxicity changes of the leachate for the early-stabilization of the model landfill were monitored by Microtox™, ToxScreen-II, and DaphTox. During the test periods, leachate quality was improved and its toxicities were also reduced. Though ToxScreen-II (pro-organic buffer) was the most sensitive to the changes in the leachate quality, toxic responses of each organism to each leachate were similar except for that in PM buffer (ToxScreen-II). Combination of H2O2 and air supply to the landfill was helpful for the early-stabilization, reducing its leachate toxicity the fastest. Thus, it was concluded that the toxicity tests were effective tool for monitoring the leachate quality after the application of the chemical oxidation method for landfill stabilization and its incorporation to set up the criteria for early- stabilization of landfills needs to be considered.
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management
