Source Based Characterization and Pollution Profile of a Baker's Yeast Industry     

Mustafa Evren Ersahin  Recep Kaan Dereli  Hale Ozgun  Berivan Gunes Donmez  Ismail Koyuncu  Mahmut Altinbas  Izzet Ozturk 《洁净——土壤、空气、水》2011,39(6):543-548

Baker's yeast industry has significant effects on environment due to significant water consumption and high strength wastewater production. Effluents from baker's yeast industry are characterized by high concentrations of biological oxygen demand (BOD₅), chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN), total dissolved solids (TDS), sulfate, and dark brown color. The aim of this study is to provide a detailed quantitative and qualitative identification and characterization of the wastewater sources from different processes of a baker's yeast industry. It is identified that the most polluted wastewater components of the facility are coming from rotary drum filter and evaporation process. However, the highest pollution loads is identified as tank and equipment cleaning effluent due to very high flow rate from this source. The efforts should be on the way to minimize the water usage for the tank and equipment cleaning process, and to recycle less polluted waste streams back to the process.  相似文献   

Efficient conceptual model for simulating the effect of aquifer heterogeneity on natural groundwater discharge to rivers   总被引：1，自引：0，他引：1  

David Pulido-Velazquez  Carlos Llopis-Albert  Salvador Peña-Haro  Manuel Pulido-Velazquez 《Advances in water resources》2011,34(11):1377-1389

When linearity can be assumed (linear response of heads to stresses), stream–aquifer flow exchange can be simulated as the drainage of a number of independent linear reservoirs. This conceptual model, which can be mathematically deduced in a univocal way from an eigenvalue solution of the linear groundwater flow problem, facilitates the understanding of the physical phenomenon and the analysis of influencing factors. The number of reservoirs required to simulate stream depletion in some ideal homogeneous cases of stream–aquifer connection was analyzed in detail in a previous investigation using analytical eigenvalue solutions [16]. However, most aquifers are heterogeneous in nature and numerical solutions must be employed to analyze whether they could also be simulated using few reservoirs. This paper presents a stochastic analysis of the influence of heterogeneity on the simulation of natural groundwater discharges in aquifers connected to rivers, as a series of linear reservoirs. A Monte-Carlo approach was employed to perform this study. The results show that, on a monthly time scale, many cases (even heterogeneous aquifers) can be simulated using just a few reservoirs with sufficient accuracy and at minimum computational cost. Therefore, this modeling technique can be useful to efficiently simulate the integrated management of complex water resources systems at the basin scale (with many aquifers, reservoirs, demands, etc.) that need to simultaneously consider surface and groundwater flow and stream–aquifer interaction.  相似文献   

Study on the S-wave Splitting Characteristics in the Longtan Reservoir Area,Guangxi,China     

Shi Haixi  Zhao Cuiping 《中国地震研究》2011,25(2):213-226

In this paper,the shear wave splitting features of the Longtan reservoir area are studied by adopting the traditional cross-correlation coefficient method and polarization analysis,using the data recorded by the seismic network founded by a project under the National Science and Technology Pillar Program from April 2009 to April 2010.We found that most of polarization directions at seismic stations are consistent with the direction of the overall regional stress field,but local structures and faults may con...  相似文献   

The Focal Mechanism and Characteristic of Stress Field in the Zipingpu Area before the M_S8.0 Wenchuan Earthquake     

Zhang Yongjiu  Zhang Zhiwei 《中国地震研究》2011,25(2):227-239

Based on seismic wave records of the Chengdu digital seismic network and Zipingpu reservoir digital seismic network from August 16,2004 to May 12,2008 when the Wenchuan MS8.0 earthquake occurred,the parameters of focal mechanisms of 486 earthquakes with magnitude larger than M1.6 in the Zipingpu reservoir area were calculated using amplitude ratio method,meanwhile the temporal-spatial variation characteristics of mechanisms and stress field were analyzed based on these parameters.Results show a low ratio of thrust earthquakes and an increased number of strike-slip earthquakes in the reservoir water area in the period from 2006 to 2008.While in the areas far from the reservoir waterfront,the thrust earthquakes took up a high proportion and the strike-slip ones did not increase.The direction of mean principal compressive stress field was deflected and disturbed differently in each area before the Wenchuan MS8.0 earthquake.  相似文献   

Reconstruction of sub-wavelength fractures and physical properties of masonry media using full-waveform inversion of proximal penetrating radar   总被引：1，自引：0，他引：1  

Claudio Patriarca  Sbastien Lambot  M.R. Mahmoudzadeh  Julien Minet  Evert Slob 《Journal of Applied Geophysics》2011,74(1):26-37

  相似文献   

三峡库首区非构造型水库地震的烈度衰减     

孟庆筱  冯光钰  梅启双  吕健 《地震工程学报》2011,33(Z1)

非构造型水库地震具有震级小、震源浅、烈度高的特点,研究其烈度衰减对库区地震地质灾害的预测与防治具有重要的意义。根据三峡库首区近年地震实地科考原始烈度资料,选择椭圆衰减模型并对其进行二元回归分析,得到非构造型水库地震的烈度衰减关系。并与原有构造型水库地震烈度衰减关系进行比较。结果可供库区地震危险性分析与地震小区划使用。  相似文献   

新丰江水库地震序列的分段研究   总被引：1，自引：0，他引：1  

万永芳  杨马陵 《华北地震科学》2011,(4):27-33

从新丰江水库地震序列分段、地震序列参数统计、地震序列分段与库水位关系等方面探讨新丰江地区的地震特征.结果表明:①水库地震全序列低b值(≤0.9)时段与大区域地震活动的增强存在一定的相关性,余震活动在一定程度上具有华南地区地震活动“窗口”的作用.②水库地震晚期余震释放阶段55个ML≥3.5级地震分序列研究显示,1975年...  相似文献   

克孜尔水库跨断层形变年变特征分析     

祖丽菲亚·尼亚孜  买买提·伊布拉音 《高原地震》2011,23(2):23-29

通过对克孜尔水库跨断层形变特征进行分析,结果显示:①垂直形变每年3～4月、10～11月分别为峰、谷值时间;水平形变每年6～7月、1月分别为峰、谷值时间.②垂直变形的峰-谷时间间隔在1997年之前多为5～8个月,1998年后多为1～3个月;谷-峰值时间间隔在1997年前多为4～7个月,1998年后多在8～11个月.水平形...  相似文献   

2008年三峡水库入库洪水特点与预报效果评价     

李春红  王玉华  王建平  任立良 《水文》2011,31(1):31-34,80

对2008年三峡水库入库洪水特点进行分析,并针对场次洪水和连续自动预报两种方式进行预报误差统计,两种方式预报结果都表明2008年实时联机水文预报精度达到水文情报预报规范的甲级标准,同时发现未来降雨对三峡水库入库预报精度影响较大,部分场次洪水结合(不结合)未来降雨的预报精度差别很大,且随着预见期增长,预报误差也加大。  相似文献   

塔里木盆地卡塔克隆起卡1三维区块奥陶系鹰山组储层特征与影响因素          下载免费PDF全文

李让彬樊太亮  高志前胡晓兰 《中国地质》2011,38(4):1016-1024

奥陶系鹰山组一直是塔里木盆地油气勘探的重点层位。综合运用岩心、薄片、成像测井、分析测试以及三维地震资料,对鹰山组储层特征以及影响因素进行了分析。结果表明:鹰山组整体岩性以粉-细晶白云岩,砂屑灰岩,灰质白云岩为主,储集空间以溶蚀孔洞、裂缝为主;上部为风化壳岩溶储层,溶孔-裂缝发育,中下部为裂缝性储层,裂缝发育,纵向上具有上孔下缝特征,储层非均质性强;加里东中期I幕运动形成的构造不整合面是该区岩溶储层发育的重要因素;加里东中期—早海西期形成的断裂和构造裂缝是该区储层发育的关键;早二叠世时期与火山作用伴生的岩溶烘烤以及埋藏溶蚀作用对储层发育具有积极作用。  相似文献