| 引用本文: | 王硕,时文歆,于水利,衣雪松.低温好氧颗粒污泥培养及其基质降解动力学[J].哈尔滨工业大学学报,2012,44(6):11.DOI:10.11918/j.issn.0367-6234.2012.06.003 |
| WANG Shuo,SHI Wen-xin,YU Shui-li,YI Xue-song.Cultivation of aerobic granules and substances degradation kinetics at low temperature[J].Journal of Harbin Institute of Technology,2012,44(6):11.DOI:10.11918/j.issn.0367-6234.2012.06.003 |
|
| 摘要: |
| 针对目前关于低温条件下好氧颗粒污泥的形成及其基质降解动力学的研究较少的现状,利用乙酸钠为基质,在10 ℃低温条件下培养好氧颗粒污泥,结果表明,经过25 d的培养,表面光滑、结构紧密的好氧颗粒污泥形成,表现出良好的沉降性能和较高的生物量．[JP5]培养成熟的低温好氧颗粒污泥对污水具有较高的处理效能,COD、NH4+-N、PO43--P去除率分别达845％、911％和941％,较好地实现了碳氮磷的低温高效同步去除．低温好氧颗粒污泥形成过程中,胞外聚合物中蛋白质类的质量分数明显升高,单位MLSS达1061 mg／g,蛋白质类与多糖类的比值(m(PN)／m(PS))为157,说明较高质量浓度的蛋白质类是好氧颗粒污泥形成的重要因素．[JP5]好氧颗粒污泥较高质量浓度的EPS、较多的传质通道和较大的比表面积,使其对水中污染物具有较高的吸附性能．基质降解动力学研究表明,相应的最大表观降解速率k和表观半速率常数Ks分别为549 d-1和4 760 mg／L,好氧颗粒污泥系统的基质降解速率主要受液相和颗粒之间的传质效 |
| 关键词: 低温 好氧颗粒污泥 降解动力学 胞外聚合物 |
| DOI：10.11918/j.issn.0367-6234.2012.06.003 |
| 分类号:TU991 |
| 基金项目:国家高技术研究发展计划项目(2008AA06Z304);国家科技部合作项目(2010DFA92460);国家水体污染控制与治理科技重大专项(2009ZX07424-005) |
|
| Cultivation of aerobic granules and substances degradation kinetics at low temperature |
|
WANG Shuo1, SHI Wen-xin1, YU Shui-li1,2, YI Xue-song1
|
|
1.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, China;2.State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering,
Tongji University, 200092 Shanghai, China
|
| Abstract: |
| The aerobic granules (AGS) were difficult to cultivate and the degradation kinetics of AGS at low temperature were seldom investigated, which greatly limited the development and application of AGS. In this study, AGS possessed better settling property and higher biomass after cultivation by sodium acetate for 25 d, furthermore, AGS formation time significantly decreased for 48 d at 10 ℃ in a sequencing batch airlift reactor (SBAR) and AGS possessed better simultaneously COD, NH4+-N and PO43--P removal efficiency at low temperature, and the respective removal efficiencies were 845％, 911％ and 941％. Compared with the conventional cultivation of AGS, the content of total protein was as high as 1061 mg／g and the total proteins／total polysaccharides (m(PN)／m(PS)) ratio was 157, which meant that the relative high protein content was an essential feature for AGS formation. The adsorption of organic substances by AGS was higher than that of floc sludge because of the higher contents of EPS, more channels for mass and oxygen transfer as well as the greater specific surface area of AGS. The experimental data indicated that the substances degradation kinetics generally followed Monod equation, the corresponding kinetic coefficient of k and Ks were 549 d-1 and 4 760 mg／L, respectively. The degradation rate of substances was obviously influenced by the mass transfer efficiency between liquid phase and AGS. |
| Key words: low temperature aerobic granules degradation kinetics extracellular polymeric substances (EPS) |
