好氧颗粒污泥处理制糖工业废水厌氧出水的除磷特性研究  

Phosphorus Removal Characteristics by Aerobic Granules in Normal Molasses Wastewater After Anaerobic Treatment

作　　者：王硕[1] 于水利[1,2] 时文歆[1] 暴瑞玲[3] 衣雪松[1] 李建政[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092 [3]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《环境科学》2012年第4期1293-1298,共6页Environmental Science

基　　金：国家自然科学基金项目(50978068);科技部国际合作项目(2010DFA92460);国家水体污染控制与治理科技重大专项(2009ZX07424-005)

摘　　要：制糖工业废水经厌氧生物处理后,COD大幅下降,但是出水中N、P含量仍然较高,严重破坏水体生态平衡.利用好氧颗粒污泥对制糖工业废水的厌氧出水进行脱氮除磷处理,讨论了其除磷过程.经复合底物(乙酸盐、丙酸盐、丁酸盐)培养的好氧颗粒污泥直径1.7 mm,SVI为38.43 mL.g-1,TP去除率达90.9%,出水磷含量仅为1.3 mg.L-1,单位COD释磷率为0.571,厌氧条件下磷的释放速率达到5.73 mg.(g.h)-1,好氧颗粒污泥表现出较好的沉淀性能和较高的除磷活性.由于底物中丙酸盐、丁酸盐含量增加,使得聚磷菌在反硝化过程中NO3--N的利用率增加,即消耗单位质量的NO3--N可以吸收更多的磷.好氧颗粒污泥及其胞外聚合物中P元素的含量与其中Mg、Ca、Fe元素的含量表现出很高的相关性,胞外聚合物对P的吸附使得体系除磷能力进一步增强.通过对污泥反硝化除磷的研究发现,反硝化聚磷菌占总聚磷菌的61.9%,其吸磷量与消耗硝酸盐的比值[m(P)/m(NO3--N)]为1.14.COD decreased obviously in normal molasses wastewater after anaerobic treatment,however,concentrations of nitrogen and phosphorus were still higher in the effluent which seriously damaged the ecological balance.In this study,aerobic granules cultivated in sequencing batch airlift reactor（SBAR） were carried out for treating the effluent;phosphorus removal processes and characteristics were discussed as well.The mean diameter of aerobic granules cultivated by multiple carbon sources（acetate,propionate and butyrate） was 1.7 mm.The average phosphorus removal efficiency was 90.9% and the level of phosphorus in effluent was only 1.3 mg·L-1;TP released per COD consumed was 0.571 and the specific rate of TP released was 5.73 mg·（g·h）-1.NO-3-N usage of phosphorus accumulating organisms（PAOs） improved during denitrifying process because the concentration of propionate and butyrate increased in multiple carbon sources which means the phosphorus uptake efficiency increased when per NO-3-N consumed.Phosphorus content represented a stronger correlation with magnesium,calcium and ferrum contents in aerobic granules and their extracellular polymeric substances（EPS）,the phosphorus adsorption by EPS could enhance phosphorus removal.61.9% of phosphorus accumulating organisms were denitrifying phosphorus accumulating organisms in aerobic granules and TP uptake per NO-3-N consumed was 1.14 which was higher than that of aerobic granules only cultivated by acetate.

关 键 词：好氧颗粒污泥 胞外聚合物 除磷特性 反硝化聚磷菌 制糖工业废水 

分 类 号：X703.1[环境科学与工程—环境工程]