MICRO-BUBBLE AERATION OF LEACHATE FROM A GARBAGE-DUMPED LANDFILL
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概要
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Leachate from garbage-dumped landfill brings serious contamination in downstream waters. A micro-bubble aeration was conducted in order to experimentally examine its purification performance. Three types of gases, (i) atmospheric air, (ii) oxygen and (iii) ozone, were used for the aeration. Performance of water purification was discussed based on water quality measurements in a water tank experiment. The experiments were carried out in summer and winter. The laboratory data showed that the most efficient oxidation occurred in the oxygen aeration tank in which nitrification was accelerated most significantly among the three gasses. Both the ozone and the atmospheric-air tanks show lower water purification performance. Manganese was tremendously reduced through oxidation of ionic manganese by the oxygen aeration as well.
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