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Removal of denitrifying phosphorus was verified in a laboratory anaerobic/anoxic sequencing batch reactor (A/A SBR). The results obtained demonstrated that the anaerobic/anoxic strategy can enrich the growth of denitrifying phosphorus removing bacteria (DPB) and take up phosphate under anoxic condition by using nitrate as the electron acceptor. The phosphorus removal efficiency was higher than 90% and the effluent phosphate concentration was lower than lmg·L-1 after the A/A SBR was operated in a steady-state. When the chemical oxygen demand(COD) of influent was lower than 180mg·L-1, the more COD in the influent was, the higher efficiency of phosphorus removal could be attained under anoxic condition. However, simultaneous presence of carbon and nitrate would be detrimental to denitrifying phosphorus removal. Result of influence of sludge retention time (SRT) on denitrifying phosphorus removal suggested that the decrease of SRT caused a washout of DPB and consequently the enhanced biological phosphorus 相似文献
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提出一种新颖的光纤光栅传感器设计方案,使传感器对环境温度的变化引起的Bragg波长漂移进行自动补偿,而只对探测目标的空间位移做出线性的反应.从而实现不受环境温度影响的空间位移传感器网络,在环境温度变化的干扰下对目标物体空间位移的长距离高精度探测. 相似文献
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buck-boost变换器在半导体照明控制中应用广泛。本文对其工作模式特性等方面作了探讨,采用OCC(One-Cycle-Control)多环控制技术,通过环路误差放大及电压补偿等工程整定设计,创建了一种降压/升压型大功率高效驱动新系统。与传统同类设计相比,系统动态性能更好(如功率因数、速度响应等),消除了稳态误差,对外界环境的变化适应性强。 相似文献
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以邻苯二甲酸二丁酯为给电子体制备了新型乙烯聚合催化剂LY-1。考察了催化剂LY-1用于乙烯聚合时的催化性能。结果表明,添加第3组分给电子体后,催化剂LY-1的聚合活性和颗粒形态均有改进,催化剂LY-1的氢调敏感性较好,催化剂寿命长,催化剂LY-1与丙烯呈现很好的共聚性能。 相似文献
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采用序批式反应器短程生物脱氮工艺处理高氨氮制药废水 总被引:6,自引:0,他引:6
根据制药废水高氨氮、高pH值、高碱度的特点,采用序批式反应器(SBR)对该废水短程生物脱氮的可行性和影响因素进行了研究.在常温(23±1)℃的条件下,实现了低碳氮比制药废水的短程硝化与反硝化,脱氮效率达99%以上.结果表明,在高游离氮条件下,硝酸菌比亚硝化菌对游离氨更为敏感,反应体系中亚硝酸盐的平均积累速率远大于硝酸盐的平均积累速率.在处理该制药废水的短程硝化与反硝化过程中,pH值的变化表现出一定的规律性,其变化反映了硝化和反硝化进行的程度.可以利用pH值变化的特征点来准确判断硝化和反硝化过程的结束,进而实现对该过程的在线模糊控制. 相似文献
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