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characteristics of contaminants
相关语句
  水质特征
     The Characteristics of Contaminants of Municipal Wastewater in Wuhan and its Treating Processes
     武汉市城市污水水质特征及其处理对策
短句来源
     Analysis on the Characteristics of Contaminants in Municipal Wastewater Discharged from Qingshan District,Wuhan
     武汉市青山区城市污水水质特征分析
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  “characteristics of contaminants”译为未确定词的双语例句
     Study on Characteristics of Contaminants Transferring in Soil and Groundwater from Landfill Leachate and Its Prevention
     污染物在土壤及地下水中运移特征与防治研究
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  相似匹配句对
     And the characteristics of the G.
     通过仿真和实验,也验证了G.
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     The characteristics of G.
     论文首先对语音编码的各种方案进行了比较,并对G.
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     characteristics;
     三、发展的特点;
短句来源
     The Characteristics of Contaminants of Municipal Wastewater in Wuhan and its Treating Processes
     武汉市城市污水水质特征及其处理对策
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     Channel Characteristics;
     信道特性 ;
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  characteristics of contaminants
The migration characteristics of contaminants were analyzed using advanced computing systems to predict the long-term plume concentration in underlying soils and aquifers located directly below the final waste layer.
      


Based on the study of the hydraulic properties of fracture karst aquifer and the characteristics of contaminant in Dawu well field in Zibo City, a numerical modeling of fracture karst water head and contaminants transport in the aquifer was studied The equivalent porous media model is widely used as a numerical computation of fracture karst water Nevertheless, there is a great difference between the porous media and the fracture karst media The openings of groundwater flow and storage in...

Based on the study of the hydraulic properties of fracture karst aquifer and the characteristics of contaminant in Dawu well field in Zibo City, a numerical modeling of fracture karst water head and contaminants transport in the aquifer was studied The equivalent porous media model is widely used as a numerical computation of fracture karst water Nevertheless, there is a great difference between the porous media and the fracture karst media The openings of groundwater flow and storage in fracture karst media are the net of dissolved fractures The transmissivity of fracture karst media is much larger than that of porous media, but the specific yield and coefficient of the storage are much smaller Therefore the velocity of fracture karst water flow is much larger than that of the porous water These properties of fracture karst aquifer must be considered in the numerical modeling The groundwater head equation and the advective dispersive equation should be solved simultaneously in the contaminant transport modeling The software MODFLOW and MT3D have been used in this research The results of numerical computation showed that the fitting error of the modeling produced by equivalent porous media model was less than the demand of National Standard GB/T14497 93 The accuracy of the computation of water balance was also met the requirement The peclet number of the transport is 95 67,which is an average number The transport is an advection dominant problem The numerical dispersion and oscillation may occur in the modeling Several numerical methods, such as upstream finite difference method (UFDM), method of characteristics (MOC), modified method of characteristics (MMOC), hybrid method of characteristics (HMOC) and total variation diminishing (TVD), have been used for the same transport modeling, as well as for comparison of the results TVD and HMOC are proved better than the others The study shows that TVD and HMOC are suitable for the transport modeling Hydraulic conductivity K and effective porosity θ have a great influence on the results of transport However it is difficult to determine the values of K and θ in fracture karst aquifer accurately Therefore, the accuracy of the transport modeling obtained by equivalent porous media model of fracture karst aquifer is lower than that of the water head modeling

在分析研究淄博市大武水源地裂隙岩溶含水层的水力性质和污染物运移特征的基础上 ,对裂隙岩溶水的水头和污染物运移进行数值研究。目前国内外对裂隙岩溶水进行数值计算时 ,通常用等价多孔介质模型 ,但裂隙岩溶介质和多孔介质有很大不同。裂隙岩溶介质的储水和导水空间为裂隙网络 ,导水系数大 ,地下水的实际平均流速比孔隙水大得多 ,但给水度和贮水系数小。当用等价多孔介质模型进行模拟时应考虑这些特点。对于污染物运移的模拟 ,要同时求解水头方程和对流弥散方程 ,可采用MODFLOW和MT3D软件进行模拟。研究区裂隙岩溶水水头的数值计算表明 ,等效多孔介质模型水头的拟合误差能满足国标GB/T144 97- 93的要求。各时段地下水水量均衡计算的精度也满足要求。对流弥散方程的数值计算 ,由于Peclet数高达 95 .6 7,对流占绝对优势 ,可能存在数值弥散和数值振荡 ,因而采用多种方法进行了比较。对于同一问题 ,同时采用上游有限差分法 (UFDM) ,混合的欧拉拉格朗日方法 (特征线法MOC、改进特征线法MMOC和混合特征线法HMOC) ,总变异消减法(TVD)进行计算 ,并比较其结果。结果表明 ,混合特征线法 (HMOC)和总...

在分析研究淄博市大武水源地裂隙岩溶含水层的水力性质和污染物运移特征的基础上 ,对裂隙岩溶水的水头和污染物运移进行数值研究。目前国内外对裂隙岩溶水进行数值计算时 ,通常用等价多孔介质模型 ,但裂隙岩溶介质和多孔介质有很大不同。裂隙岩溶介质的储水和导水空间为裂隙网络 ,导水系数大 ,地下水的实际平均流速比孔隙水大得多 ,但给水度和贮水系数小。当用等价多孔介质模型进行模拟时应考虑这些特点。对于污染物运移的模拟 ,要同时求解水头方程和对流弥散方程 ,可采用MODFLOW和MT3D软件进行模拟。研究区裂隙岩溶水水头的数值计算表明 ,等效多孔介质模型水头的拟合误差能满足国标GB/T144 97- 93的要求。各时段地下水水量均衡计算的精度也满足要求。对流弥散方程的数值计算 ,由于Peclet数高达 95 .6 7,对流占绝对优势 ,可能存在数值弥散和数值振荡 ,因而采用多种方法进行了比较。对于同一问题 ,同时采用上游有限差分法 (UFDM) ,混合的欧拉拉格朗日方法 (特征线法MOC、改进特征线法MMOC和混合特征线法HMOC) ,总变异消减法(TVD)进行计算 ,并比较其结果。结果表明 ,混合特征线法 (HMOC)和总变异消减法 (TVD)比较适合于对流占优势的运移问题计算。由于渗透系数K和有效孔隙度θ对溶质运移结果的影响很大 ,?

The municipal wastewater in Shaihu district, Wuhan City was monitored continuously for 8 months. The results show that the diurnal hourly variation curves of concentration of every month are similar. The concentration of organic contaminants is very low, soluble organic substances are about 50 % of the total organic substances, and the COD, BOD and SS in rain-weather are much more than those in dry-weather. Based on the characteristics of contaminants in the wastewater, processes of A2/O or chimical enhanced...

The municipal wastewater in Shaihu district, Wuhan City was monitored continuously for 8 months. The results show that the diurnal hourly variation curves of concentration of every month are similar. The concentration of organic contaminants is very low, soluble organic substances are about 50 % of the total organic substances, and the COD, BOD and SS in rain-weather are much more than those in dry-weather. Based on the characteristics of contaminants in the wastewater, processes of A2/O or chimical enhanced primary treatment succeeding with stabilization ponds or artificial wetland may be appropriate to treat the wastewater in Huangjiahu Wastewater Treatment Plant.

对武汉晒湖地区的城市污水水质进行了8个月的监测,结果表明各污染物指标各月的逐时变化规律具有各自的相似性,有机污染物浓度偏低且非溶解性有机物所占比例为50%左右,雨天COD,BOD和SS指标值有大幅度提高。根据该污水水质特征现状,黄家湖污水处理厂可采用生物除磷脱氮工艺或化学一级强化后续生态单元的处理工艺。

In order to determine the process and parameters of Luobuzui Wastewater Treatment Plant(LWTP), the municipal wastewater discharged from Qingshan District, Wuhan has been monitored for 7 periods of time. The results show that the curves of the concentrations of COD Cr,BOD 5,TN and TP varied with the time of day. The concentration is generally the lowest at 6 am and the highest at 2 pm, the concentration is lower than the average municipal wastewater and higher in winter, the organics in the wastewater can...

In order to determine the process and parameters of Luobuzui Wastewater Treatment Plant(LWTP), the municipal wastewater discharged from Qingshan District, Wuhan has been monitored for 7 periods of time. The results show that the curves of the concentrations of COD Cr,BOD 5,TN and TP varied with the time of day. The concentration is generally the lowest at 6 am and the highest at 2 pm, the concentration is lower than the average municipal wastewater and higher in winter, the organics in the wastewater can be degraded easily and insoluble organic substances are about 70% of the total organic substances. According to the characteristics of contaminants in the wastewater, the biological treatment processes of removed nitrogen and phosphorus or the process of CEPT succeeding with stabilization ponds or the construction wetland may be applied to treat the wastewater in the plant.

为了合理确定落步咀污水处理厂的工艺流程和设计参数 ,对武汉市青山区的城市污水水质进行了 7个周期的监测。其结果表明 :CODCr、BOD5、TN和 TP水质指标各月的逐时变化规律具有一定的相似性 ,一般 6 :0 0左右浓度处于低谷 ,14 :0 0左右达到峰值 ;污水中污染物浓度偏低 ;冬季污染物浓度较高 ;污水的可生化性较好 ;有机污染物中非溶解性部分占 70 %左右。根据污水水质特征 ,该厂可采用生物除磷脱氮工艺或化学强化一级后续生态处理单元的工艺。

 
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