| 紫外辐射下的生物降解及微生物群落的变化 |
| 摘要点击 2399 全文点击 1631 投稿时间：2010-12-18 修订日期：2011-01-26 |
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| 中文关键词 生物膜 紫外辐射 苯酚 2，4，6-三氯酚 磺胺甲恶唑 |
| 英文关键词 biofilm UV irradiation phenol 2,4,6-trichlorophnol (TCP) sulfamethoxazole (SMX) |
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| 中文摘要 |
| 分别采用一体式循环床紫外光/生物膜反应器(PCBBR)和气升式内循环的紫外光/生物膜反应器(ILPBR),用于苯酚、2，4，6-三氯酚(TCP)和抗生素药物磺胺甲恶唑(SMX)的降解.结果表明,苯酚、TCP和SMX在紫外光解与生物降解的共同作用下，其去除速率分别达到0.65、0.11和0.17 mg·(L·min)–1,除了苯酚在单独生物降解作用下的降解速率与其相近之外,该速率比单独紫外光解和单独生物降解速率均有明显提高.相应地,苯酚和TCP的COD去除率分别达到99.5%和72.1%,SMX的TOC去除率达57.3%,均高于单独紫外光解和生物降解.通过提取紫外辐射下降解有机物的生物膜进行分子生物学分析,并与未经紫外辐射的生物膜进行比较,结果表明经紫外辐射后,生物膜中微生物群落发生了很大的变化,但在紫外辐射条件下的生物膜仍然保持有较高的降解有机污染物的生物活性.该研究结果对难降解有机废水处理技术的革新具有一定理论与实践意义。 |
| 英文摘要 |
| Photolytic circulating-bed biofilm reactor (PCBBR) and internal loop photolytic-biological reactor (ILPBR) were respectively used for degradation of phenol， 2， 4， 6-trichlorophenol (TCP) and sulfamethoxazole (SMX).Experimental results indicated that the rates of phenol,TCP and SMX removal by coupled photolysis with biodegradation (P&B) reached at 0.65， 0.11 and 0.17 mg·(L·min)-1,which was clearly higher than that by photolysis alone (P),biodegradation alone (B),except phenol removal rate by B,which was similar to the rates by P&B.The COD removal percentages of phenol and TCP were 99.5% and 72.1%,and TOC removal percentage of SMX was 57.3,which all were higher that by P and B.The biofilms under UV irradiation were taken as samples for molecular biological analysis to get the significant results that microbial communities in biofilms took great change compared with that without UV irradiation,but they still kept bioactivity degrading organic pollutants.That is significant results for technological innovation on recalcitrant organic wastewater treatment. |
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