Department of Biotechnology, Transworld University, Yunlin, Taiwan.
J Environ Sci Health B. 2011;46(5):419-25. doi: 10.1080/03601234.2011.572512.
This study investigated the biodegradation of the phthalate esters (PAEs) di-n-butyl phthalate (DBP) and di-(2-ethyl hexyl) phthalate (DEHP) in sludge and sludge-amended soil. DBP (100 mg kg(-1)) and DEHP (100 mg kg(-1)) were added to sewage sludge, which was subsequently added to soil. The results showed that sewage sludge can degrade PAEs and the addition of sewage sludge to soil enhanced PAE degradation. Sludge samples were separated into fractions with various particle size ranges, which spanned 0.1-0.45 μm to 500-2000 μm. The sludge fractions with smaller particle sizes demonstrated higher PAE degradation rates. However, when the different sludge fractions were added to soil, particle size had no significant effect on the rate of PAE degradation. The results from this study showed that microbial strains F4 (Rhodococcus sp.) and F8 (Microbacterium sp.) were constantly dominant in the mixtures of soil and sludge.
本研究考察了邻苯二甲酸酯（PAEs）中邻苯二甲酸二丁酯（DBP）和邻苯二甲酸二（2-乙基己基）酯（DEHP）在污泥和添加污泥的土壤中的生物降解情况。将 DBP（100mgkg(-1)）和 DEHP（100mgkg(-1)）添加到污水污泥中，随后将其添加到土壤中。结果表明，污水污泥可以降解 PAEs，并且向土壤中添加污水污泥可以增强 PAE 的降解。将污泥样品分离成不同粒径范围的级分，粒径范围为 0.1-0.45μm 至 500-2000μm。粒径较小的污泥级分表现出更高的 PAE 降解速率。然而，当将不同的污泥级分添加到土壤中时，粒径对 PAE 降解速率没有显著影响。本研究结果表明，微生物菌株 F4（红球菌属）和 F8（微杆菌属）在土壤和污泥混合物中一直占优势。
