沸石加气混凝土生物填料制备及其序批式脱氮水处理研究

发布时间：2019-06-04 13:53

【摘要】：近年来,城市污水处理厂作为城市净水的重要设施,越来越受到社会各界的高度重视。曝气生物滤池,作为一种结合了活性污泥法与生物膜法的成熟水处理工艺,具有占地面积小,投资低,自动化程度高等特点,十分适合当下老旧污水处理厂的升级与改造。本文以天然斜发沸石粉为主要原料,水泥为粘结剂,铝粉为造孔剂通过优化实验制备出沸石加气混凝土生物填料(ZPBF),利用偏光显微镜(PM)、扫描电子显微镜(SEM)等技术来表征ZPBF孔结构特征,综合运用多种分子生物学手段来分析ZBPF-BAF中的微生物特性。结果表明:ZPBF开放孔隙率达到29.55%,为微生物进入ZPBF的内部附着生长提供空间。BET-N_2吸附测得介孔孔径平均11.92nm,比表面积59.54m2/g,有利于离子交换吸附。ZPBF装填实验柱挂膜成熟后,以模拟含NH_4~+-N废水进行离子交换吸附、排空、鼓风微生物硝化再生、淋洗硝酸盐四阶段序批式运行,当离子交换吸附阶段HRT为2.8h,进水NH_4~+-N浓度10mg/L,以出水NH_4~+-N浓度1.5mg/L为穿透点,可吸附NH_4~+-N运行5d,鼓风24h可完成再生,NH_4~+-N平均去除率达到87%,TN平均去除率达到60%,出水达到北京城镇污水处理厂水污染物排放标准一级B。
[Abstract]:In recent years, as an important facility of urban water purification, municipal sewage treatment plant has been paid more and more attention by all walks of life. Biological aerated filter, as a mature water treatment process which combines activated sludge process and biofilm process, has the characteristics of small occupation area, low investment and high degree of automation. It is very suitable for the upgrading and transformation of old sewage treatment plants at present. In this paper, using natural clinoptilolite powder as main raw material, cement as binder and aluminum powder as pore-making agent, zeolites aerated concrete biological fillers (ZPBF), were prepared by polarizing microscope (PM),. Scanning electron microscope (SEM) and other techniques were used to characterize the pore structure of ZPBF, and a variety of molecular biological methods were used to analyze the microbial characteristics in ZBPF-BAF. The results showed that the open porosity of ZPBF reached 29.55%, which provided space for the internal attachment and growth of microorganisms entering ZPBF. The average mesoporous pore size and specific surface area measured by BET-N_2 adsorption were 11.92 nm and 59.54 m ~ 2 路g, respectively. It is beneficial to ion exchange adsorption. After the membrane of ZPBF loading experimental column is mature, the simulated wastewater containing NH_4~-N is used for ion exchange adsorption, emptying, nitrification and regeneration of blast microorganisms, and sequential batch operation of leaching nitrate. When the HRT of ion exchange adsorption stage is 2.8 h, the influent NH_4~-N concentration is 10 mg 路L, and the effluent NH_4~-N concentration 1.5mg/L is used as the penetration point, NH_4~-N can be adsorbed for 5 days and regenerated for 24 h. The average removal rate of NH_4~-N is 87%, and the average removal rate of TN is 60%. The effluent reaches the first class of water pollutant discharge standard of Beijing Municipal sewage treatment Plant.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

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