Simultaneous removal of the NOx and chlorinated organic compounds contained in exhaust gas from incinerator

氮氧化物和氯代有机物是垃圾焚烧炉排出的废气中常见的污染物。小型焚烧炉废气的处理必须在多变的条件下进行。实际上用于NOx处理的催化还原方法在这些条件下是不合适的。微藻似乎适合于焚烧炉废气的处理，因为微藻具有很高的适应能力，虽然海洋绿色藻类在我们以前的研究中被用于NOx的去除，但淡水微藻在焚烧炉废气的情况下是有用的，这通常是建在内陆位置。以2，4-二氯苯酚为模型化合物，筛选出适合焚烧炉废气处理的淡水微藻。具体得到以下结果：1.淡水微藻的筛选。绿色藻，小球藻。液泡藻（vacuolata）是从淡水绿色藻类和蓝绿色藻类中筛选出的一株同时具有去除氮氧化物和2，4-二氯苯酚能力的菌株。研究了C.检查了fusca。此外，还研究了适合该菌株脱氮的生物反应器.对氯酚类化合物的去除研究：考察了该菌对邻氯酚、间氯酚、对氯酚、2，4，6-三氯酚等氯酚类化合物的去除能力，发现该菌对多种氯酚类化合物都有去除能力.同时去除氮氧化物和氯酚的实验研究了该菌同时去除2，4-二氯酚和氮氧化物的培养条件。

Nitrogen oxides and chlorinated organic compounds are often found in exhaust gas from incinerator. The treatment of exhaust gas from small-scale incinerator must be carried out under the variable conditions. The catalytic reduction process, which has been used practically for the NOx treatment, is unsuitable under these conditions. Microalgae seems to be suitable for the incinerator exhaust gas treatment, because microalgae have high ability to adapt themselves to the given environment Though the marine green alga has been used for NOx removal in our previous study, freshwater microalgae were useful in the case of exhaust gas from the incinerator, which is often built in the inland location. Freshwater microalgae were screened for the treatment of the incinerator exhaust gas, by using 2,4-dichlorophenol as a model compound. Following results were concretely obtained.1. Selection of freshwater microalgae.Green alga, Chlorella fusca var. vacuolata, was selected from freshwater green algae and blue-green algae as a strain which has ability to remove both NOx and 2,4-dichlorophenol.2. Removal of NOx.The culture condition for effective NOx removal by C. fusca was examined. In addition, the bioreactor suitable for NOx removal by this strain was also investigated.3. Removal of chlorophenols.Removal ability of chlorophenols (o-chlorophenol, m-chlorophenol, p-chlorophenol, 2,4,6-trichlorophenol) was investigated, and it was found that this strain had the ability to remove various chlorophenols.4. Simultaneous removal of the NOx and chlorophenols.The culture condition suitable for simultaneous removal of 2,4-dichlorophenol and NOx was examined using this strain.