为了研究好氧型甲烷氧化菌对风流中甲烷的降解效能,分离纯化出可以甲烷为唯一碳源的好氧型耗甲烷菌株,设计出一种模拟巷道风流中甲烷降解实验装置,实现了对不同甲烷浓度、不同风流量、不同菌液体积的调控。实验结果表明:在保持风流量为2...为了研究好氧型甲烷氧化菌对风流中甲烷的降解效能,分离纯化出可以甲烷为唯一碳源的好氧型耗甲烷菌株,设计出一种模拟巷道风流中甲烷降解实验装置,实现了对不同甲烷浓度、不同风流量、不同菌液体积的调控。实验结果表明:在保持风流量为200 m L/min、菌液体积为200 m L的条件下,甲烷浓度越高,越有利于甲烷的降解;在菌液体积为200 m L、甲烷浓度为50%的条件下,风流量从400 m L/min减到200 m L/min,最低甲烷浓度由42%下降到33%;在保持风流量为200 m L/min、甲烷浓度为30%的条件下,菌液量越多,越有利于甲烷的降解。展开更多
为了解导排管管径对准好氧填埋的影响,运用室内模拟试验,分别采用80、50和25 mm 3种导排管管径模拟了回灌型准好氧填埋中垃圾堆体温度、渗滤液产量及水质等运行344 d的变化.结果表明:导排管管径对模拟回灌型准好氧填埋的运行有明显影响...为了解导排管管径对准好氧填埋的影响,运用室内模拟试验,分别采用80、50和25 mm 3种导排管管径模拟了回灌型准好氧填埋中垃圾堆体温度、渗滤液产量及水质等运行344 d的变化.结果表明:导排管管径对模拟回灌型准好氧填埋的运行有明显影响,管径越大,渗滤液产量越少,渗滤液pH值上升越快,而化学需氧量、氨氮和总氮等指标的污染负荷也得到快速改善;回灌型准好氧填埋导排管径和堆体水平堆放直径的比例达到1∶32时,渗滤液中有机基质能彻底降解;当二者比例大于1∶16时,不仅渗滤液中的有机基质降解彻底,而且也能迅速削减氮元素.展开更多
The family of Cr（Ⅲ） and Fe（Ⅲ）-doped rutile pigments of nominal composition （M^ⅢM^V）xTi1-2xO2, with M^Ⅲ = Cr（Ⅲ） or Fe（Ⅲ） and M＇（V） = Sb, Nb, Ta, with x = 0.03, 0.15 and 0.25 were investigated as cera...The family of Cr（Ⅲ） and Fe（Ⅲ）-doped rutile pigments of nominal composition （M^ⅢM^V）xTi1-2xO2, with M^Ⅲ = Cr（Ⅲ） or Fe（Ⅲ） and M＇（V） = Sb, Nb, Ta, with x = 0.03, 0.15 and 0.25 were investigated as ceramic pigments covering the yellow-ochre-brown palette. The formulations containing Fe（Ⅲ） are novel compositions not included in the commercial rutile pigments. The materials were characterized by XRD （X-ray diffraction） analysis and FTIR （Fourier transformed infrared spectroscopy）. The transition temperature from anatase-to-rutile was estimated by the evolution of the spectral patterns. This crystal phase transition is responsible of the color formation. A higher distortion of TiO6 octahedra is observed in the case of （FeSb） containing cells which contribute to the enhancement of the light absorption. The coloring performance of all the formulations were evaluated by enameling the mixtures containing 5% pigments and commercial frits representative of single and double firing industrial processes. The chromatic values obtained are in the yellow to brown domain of the chromatic plot, depending on the composition of the pigment-frit batch. In the case of the Fe-glazes, and particularly the combination （FeNb）, the chromatic values are close to the best yellow tinting. This new FeNb-rutile pigment could be a more benign substitute of Cr-yellow pigments. The homogeneity of the enamels was confirmed by SEM （scanning electron microscopy）-EDAX （energy dispersive X-ray analysis） microscopy.展开更多
为了解风流中低浓度甲烷的降解效果,培养了以甲烷为唯一碳源的好氧型耗甲烷微生物,并自主设计了模拟风流中低浓度甲烷降解实验系统,达到了调节风流中甲烷浓度、风速及菌液浓度的目的。通过实验发现,在保持恒定甲烷氧化菌液喷洒速度的前...为了解风流中低浓度甲烷的降解效果,培养了以甲烷为唯一碳源的好氧型耗甲烷微生物,并自主设计了模拟风流中低浓度甲烷降解实验系统,达到了调节风流中甲烷浓度、风速及菌液浓度的目的。通过实验发现,在保持恒定甲烷氧化菌液喷洒速度的前提下,喷洒菌液浓度越高,越有利于甲烷的降解;在保持风流中甲烷浓度相同的条件下,在风速（300~500 m L/min）范围内,风速越大越不利于甲烷的降解,并且有效降解持续时间也随之下降;在保持相同风速、甲烷浓度的前提下,发现在风流中甲烷浓度（10%~30%）范围内,甲烷浓度越高氧化效果越明显。展开更多
文摘为了研究好氧型甲烷氧化菌对风流中甲烷的降解效能,分离纯化出可以甲烷为唯一碳源的好氧型耗甲烷菌株,设计出一种模拟巷道风流中甲烷降解实验装置,实现了对不同甲烷浓度、不同风流量、不同菌液体积的调控。实验结果表明:在保持风流量为200 m L/min、菌液体积为200 m L的条件下,甲烷浓度越高,越有利于甲烷的降解;在菌液体积为200 m L、甲烷浓度为50%的条件下,风流量从400 m L/min减到200 m L/min,最低甲烷浓度由42%下降到33%;在保持风流量为200 m L/min、甲烷浓度为30%的条件下,菌液量越多,越有利于甲烷的降解。
文摘为了解导排管管径对准好氧填埋的影响,运用室内模拟试验,分别采用80、50和25 mm 3种导排管管径模拟了回灌型准好氧填埋中垃圾堆体温度、渗滤液产量及水质等运行344 d的变化.结果表明:导排管管径对模拟回灌型准好氧填埋的运行有明显影响,管径越大,渗滤液产量越少,渗滤液pH值上升越快,而化学需氧量、氨氮和总氮等指标的污染负荷也得到快速改善;回灌型准好氧填埋导排管径和堆体水平堆放直径的比例达到1∶32时,渗滤液中有机基质能彻底降解;当二者比例大于1∶16时,不仅渗滤液中的有机基质降解彻底,而且也能迅速削减氮元素.
文摘The family of Cr（Ⅲ） and Fe（Ⅲ）-doped rutile pigments of nominal composition （M^ⅢM^V）xTi1-2xO2, with M^Ⅲ = Cr（Ⅲ） or Fe（Ⅲ） and M＇（V） = Sb, Nb, Ta, with x = 0.03, 0.15 and 0.25 were investigated as ceramic pigments covering the yellow-ochre-brown palette. The formulations containing Fe（Ⅲ） are novel compositions not included in the commercial rutile pigments. The materials were characterized by XRD （X-ray diffraction） analysis and FTIR （Fourier transformed infrared spectroscopy）. The transition temperature from anatase-to-rutile was estimated by the evolution of the spectral patterns. This crystal phase transition is responsible of the color formation. A higher distortion of TiO6 octahedra is observed in the case of （FeSb） containing cells which contribute to the enhancement of the light absorption. The coloring performance of all the formulations were evaluated by enameling the mixtures containing 5% pigments and commercial frits representative of single and double firing industrial processes. The chromatic values obtained are in the yellow to brown domain of the chromatic plot, depending on the composition of the pigment-frit batch. In the case of the Fe-glazes, and particularly the combination （FeNb）, the chromatic values are close to the best yellow tinting. This new FeNb-rutile pigment could be a more benign substitute of Cr-yellow pigments. The homogeneity of the enamels was confirmed by SEM （scanning electron microscopy）-EDAX （energy dispersive X-ray analysis） microscopy.
文摘为了解风流中低浓度甲烷的降解效果,培养了以甲烷为唯一碳源的好氧型耗甲烷微生物,并自主设计了模拟风流中低浓度甲烷降解实验系统,达到了调节风流中甲烷浓度、风速及菌液浓度的目的。通过实验发现,在保持恒定甲烷氧化菌液喷洒速度的前提下,喷洒菌液浓度越高,越有利于甲烷的降解;在保持风流中甲烷浓度相同的条件下,在风速（300~500 m L/min）范围内,风速越大越不利于甲烷的降解,并且有效降解持续时间也随之下降;在保持相同风速、甲烷浓度的前提下,发现在风流中甲烷浓度（10%~30%）范围内,甲烷浓度越高氧化效果越明显。
