一体式生物净化-沉淀池对微污染水体污染物的强化去除性能  

Enhanced Pollutant Removal Performance of an Integrated Biological Settling Tank from Micro-polluted Water Bodies

作　　者：王文东[1,2] 刘荟[1] 马翠[1] 韩雨[1] 常妮妮 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]浙江清华长三角研究院生态环境研究所,嘉兴314006

出　　处：《环境科学》2016年第10期3858-3863,共6页Environmental Science

基　　金：国家自然科学基金项目(21007050);陕西省重大科技成果转化引导专项(2016KTCG01-17)

摘　　要：本文针对现有饮用水净化工艺对溶解性组分的去除能力有限,以及沉淀单元占地面积大,功能单一的问题,将生物转盘与平流沉淀池设计理念相结合,开发出一种生物净化-沉淀工艺,以提升系统对原水中浊度、有机物和氮磷的同步去除性能.结果表明,生物转盘的设置并未干扰沉淀池原有的浊度去除功能.当进水有机负荷为0.46 g·(m2·d)-1时,生物沉淀池对有机组分、氨氮、总氮和总磷的去除率分别为81.4%、95.0%、21.1%和86.0%.进一步研究发现,反硝化和除磷过程对水相中的有限碳源存在竞争关系.进水有机负荷的上升,有助于除磷过程的进行,同时沉淀出水中残留的有机组分和氨氮含量几乎不受影响,表明工艺具有一定抗冲击负荷能力,在微污染水体的强化净化处理中具有一定的应用前景.To improve the capacity of present drinking water purification process on the removal of soluble pollutants and solve the problem of large area requirement and single function existing in the application of horizontal sedimentation tank,a novel biological settling tank was developed based on the designing concepts of rotating biological disk and sedimentation tank. Experimental results showed that the usage of rotating biological disk did not have notable effects on the turbidity removal capacity of the horizontal sedimentation tank. When the organic loading rate was 0. 46 g·（ m2·d）- 1,the removal rates of organic pollutants,NH＋4-N,TN,and TP were determined to be 81. 4%,95. 0%,21. 1% and 86. 0%,respectively. Further study showed that denitrification and dephosphorization processes competed for the limited carbon source existing in the water phase. With the increase of organic loading rate in the raw water,the removal rate of TP was improved. Meanwhile,the concentrations of organic matters and NH＋4-N in the settled water were not affected,which indicated that the biological settling tank showed a capacity in resisting organic loading rate shock and could be used in the enhanced pollutant removal in treating micro-polluted water.

关 键 词：生物转盘 沉淀池 有机负荷 微污染 硝化 反硝化 

分 类 号：X52[环境科学与工程—环境工程] X824