Biological 1,4-dioxane wastewater treatment by immobilized Pseudonocardia sp. D17 on lower 1,4-dioxane concentration.
Biological 1,4-dioxane wastewater treatment by immobilized Pseudonocardia sp. D17 on lower 1,4-dioxane concentration.
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固定化假诺卡氏菌生物处理 1,4-二恶烷废水。
DOI：
10.2965/jwet.15-084
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发表时间：
2016
影响因子：
--
通讯作者：
M. Ike
中科院分区：
文献类型：
--
作者：
K. Isaka;M. Udagawa;Yuya Kimura;K. Sei;M. Ike
使用新分离的假诺卡氏菌的生物 1,4-二恶烷去除性能。对可利用 1,4-二恶烷作为唯一碳源的 D17 进行了评估。进水 1,4-二恶烷含量较低（5–50 mg/L）经过处理，以满足日本 0.5 mg/L 的污水标准。凝胶包埋技术用于固定假诺卡氏菌。 D17使其在较短的水力停留时间下不会从生物反应器中被洗掉。因此，在 0.096 kg 二恶烷/(m3·d) 的负载率和进水 1,4-二恶烷浓度为 50 mg/L 的条件下，平均出水 1,4-二恶烷浓度为 0.49 mg/L。在 25°C 下观察生物反应器在 2 周内启动。此外，即使操作温度为15℃，在二恶烷负载率为0.060kg/(m3·d)时，出水1,4-二恶烷浓度平均为0.38mg/L。在批量实验中表征了温度对 1,4-二恶烷去除活性的影响。在 33.9°C 时观察到最大 1,4-二恶烷去除活性。此外，即使在7.4℃下也观察到1,4-二恶烷去除活性，尽管与25℃相比降低至27%。假诺卡氏菌去除 1,4-二恶烷的活化能。 D17 代表温度依赖性，计算结果为 51.9 kJ/mol。
Biological 1,4-dioxane removal performance using newly isolated Pseudonocardia sp. D17, which can utilize 1,4-dioxane as the sole carbon source, was evaluated. A low level of influent 1,4-dioxane, at 5–50 mg/L, was treated to meet the Japanese effluent standard of 0.5 mg/L. The gel entrapment technique was used for immobilization of Pseudonocardia sp. D17 so that it is not washed out from the bioreactor under a short hydraulic retention time. Consequently, an average effluent 1,4-dioxane concentration of 0.49 mg/L was achieved at a loading rate of 0.096 kg dioxane/(m3 · d) with an influent 1,4-dioxane concentration of 50 mg/L. The startup of the bioreactor was observed at 25°C within 2 weeks. Moreover, the effluent 1,4-dioxane concentration of 0.38 mg/L on an average was confirmed at a loading rate of 0.060 kg dioxane/(m3 · d), even though the operating temperature was 15°C. The temperature effect on 1,4-dioxane removal activity was characterized on the batch experiment. The maximum 1,4-dioxane removal activity was observed at 33.9°C. Moreover, 1,4-dioxane removal activity was observed even at 7.4°C, although that was decreased to 27% compared with that at 25°C. The activation energy for 1,4-dioxane removal by Pseudonocardia sp. D17, representing the temperature dependency, was calculated as 51.9 kJ/mol.
DOI：
10.1099/ijs.0.63085-0
发表时间：
2005-03-01
影响因子：
2.8
作者：
Mahendra, S;Alvarez-Cohen, L
通讯作者：
Alvarez-Cohen, L