廃棄物堆積層からの浸出水の曝気?硝化過程に関する水質モデル

摘要

Leachate from garbage-dumped landfill brings serious contamination in downstream waters. Micro-bubble aeration is experimentally conducted in a laboratory tank for the purpose of developing a new water treatment system. Water purification performance especially focusing on nitrification is investigated. Three types of gases, (ⅰ) natural air, (ⅱ) oxygen and (ⅲ) ozone, are used for the aeration. A water quality analysis is carried out in order to predict water quality behaviors, where balances are considered in respect to dissolved oxygen, bacteria, ammonia, nitrite, nitrate and manganese. Time-development of each water quality component is reproduced with satisfactory agreement and the model is verified through comparison with laboratory data. The data show that the oxygen aeration tank shows most efficient nitrification among the three gasses.