Department of Cosmetic Application & Management, St. Mary's Junior College of Medicine, Nursing and Management, Yilan 26644, Taiwan, ROC.
Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, ROC.
Bioresour Technol. 2015 Oct;193:357-62. doi: 10.1016/j.biortech.2015.06.099. Epub 2015 Jun 25.
Ethylene diamine tetra acetic acid (EDTA), the effluent of secondary biotreatment units, can be properly biodegraded by Burkholderia cepacia. Through batch degradation of EDTA, the raw wastewater of EDTA was controlled at 50 mg/L, and then nutrients was added in diluted wastewater to cultivate activated sludge, which the ratio of composition is depicted as "COD:N:P:Fe = 100:5:1:0.5". After 27 days, the removal efficiency of Fe-EDTA and COD was 100% and 92.0%, correspondingly. At the continuous process, the raw wastewater of EDTA was dictated at 166 mg/L before adding nutrients to cultivate activated sludge, in which the ratio of composition did also follow with batch process. After 22 days, the removal efficiency of Fe-EDTA and COD for experimental group was 71.46% and 62.58%, correspondingly. The results showed that the batch process was more suited for EDTA biodegradation.
乙二胺四乙酸（EDTA）是二级生物处理单元的流出物，可以被洋葱伯克霍尔德菌（Burkholderia cepacia）适当生物降解。通过 EDTA 的批量降解，将 EDTA 的原废水控制在 50mg/L，然后在稀释废水中添加营养物质来培养活性污泥，其组成比例为“COD:N:P:Fe = 100:5:1:0.5”。经过 27 天，Fe-EDTA 和 COD 的去除效率分别达到 100%和 92.0%。在连续过程中，在添加营养物质培养活性污泥之前，EDTA 的原废水设定为 166mg/L，其中组成比例也遵循批量工艺。经过 22 天，实验组 Fe-EDTA 和 COD 的去除效率分别为 71.46%和 62.58%。结果表明，批处理过程更适合 EDTA 的生物降解。
