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以模糊数学为基础构建模糊综合评价模型,并将该模糊综合评价模型应用于晋江流域的水环境质量综合评价中。分析结果表明,晋江流域水质优于Ⅲ类水质,并由模型中各评价因子的权重判断,总磷为晋江流域的主要污染物。 相似文献
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根据模糊数学原理,建立了水质模糊综合评价模型,利用该模型对2006年-2009年山东省临沂市沭河水质进行了水质评价。结果表明,(1)该模型计算方法简便且能比较客观的反映评价对象的客观实际和水质变化规律,评价结果更为可靠,是水质综合评价的一种理想、有效的方法;(2)沭河流域水质总体状况良好,一年中I级水的天数为50%、Ⅱ级水的天数为8.3%、Ⅲ级水的天数为41.7%,评价结果与实际相符;评价方法有实用价值。 相似文献
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长江,嘉陵江重庆段水质现状评价与预测 总被引:4,自引:0,他引:4
采用隶属度加权综合平均水质级别法和三参量评价指数法对长江嘉陵江重庆干流段的平均水质进行了现状评价,同时利用一维水质模型和二维水质数学模型对干流平均水质和城区段的岸边水质进行了模拟计算,提出了未来两江可能出现的水质问题以及防治污染需要重点控制的污染物。 相似文献
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水环境数学模型开发及应用的不规范会严重影响水环境管理决策的有效性和科学性.为了更好地发挥模型的职能,减少因采用的模型差异而造成差别管理等不公平因素,应当建立科学的模型筛选制度和评价体系.基于模型开发及应用的生命周期全过程,在文献调研和专家咨询基础上,提出了包含目标层、准则层和指标层的地表水水质模型综合评价指标和评价方法,其中指标层包括通用性、可靠性、友好性、先进性和易用性5个准则的29个指标.采用层次分析法和专家打分法确定指标值及指标权重,并以国内外常用的水质模型,即HEC-RAS、MIKE11、CE-QUAL-W2、WASP、EFDC和Delft3D模型为例,进行了水质模型的综合评价.案例应用的模型评价得分高低的排序依次为Delft3D、EFDC、CE-QUAL-W2、MIKE11、WASP和HEC-RAS模型,结果表明建立的水质模型综合评价技术体系科学、可靠、易用,可为我国水环境数学模型的规范化建设提供重要参考. 相似文献
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水质评价的模糊综合评判—加权平衡复合模型应用 总被引:6,自引:0,他引:6
依据模糊集理论,运用二级模糊综合评判模型对京杭运河蔺家坝断面的水质进行了初次评价,并在此基础上,引入加权平均分析方法,对水质进一步评价,结论与实际情况相符。本研究提出了环境质量分级与评价的模糊综合-加权平均复合模型。它既克服了单层评价模型因考虑的因素过多,权重难以分配的困难,又避免的二级模型评价时,对于最大隶属度同为一个级别的样点,其间的环境质量优劣难以判断的缺点。 相似文献
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基于多元统计的水质动态评价模型研究与应用 总被引:1,自引:0,他引:1
给出一种基于多元统计的水质动态评价模型方法,该模型方法以全局主成分分析(GPCA)方法为主,以动态聚类分析、判别分析为辅助方法。再以湟水流域水质断面为例,根据有机污染、无机污染和综合污染等3个方面对这些水质断面1998—2005年水质污染状态进行定量评价和动态分析。研究结果表明:湟水流域水质断面有机污染较为严重,以上3个方面的污染状态逐年严重,综合污染指数均值从1998年的1.63605上升到2005年的2.38624,2001年以后有加速恶化的迹象。 相似文献
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Reclamation treatment of the chrome leather scrap 总被引:1,自引:0,他引:1
A novel method to extract protein and Cr(III) from the chrome leather scrap discarded by leather industry is described.Chrome leather scarp was hydrolyzed under basic condition to remove chromium compound and extract protein. The extracted protein was mixed with substrate and used as feed protein after being dried and ground. The basic residue was treated with sulfuric acid to obtain chrome(III) sulfate which can be used as tanning agent again after adjusting pH with base. The acidic residue was processed and used as flower fertilizer. The safety of the protein powder produced has been by toxicology and nutriology test. This reclamation method has been industrialized. 相似文献
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废水中硫化物测定样品预处理方法的改进 总被引:2,自引:0,他引:2
对废水中硫化物测定预处理方法——氮气吹气法的实验装置、预处理酸度、温度及反应瓶体积大小等条件均作了研究和改进。以多孔吹球代替单孔吹管、以NaOH+EDTA+三乙醇胺代替ZnAc_2—NaAc为吸收液,并提出了逐步加压的吹气方法。通过对回收率、精密度及6种不同类型工业废水的对比测定,效果提高显著,回收率由原法的40%左右提高到95%以上,吹气时间缩短25%,装置简单,便于推广应用。 相似文献
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提出水污染综合多目标规划思路,把治理投资,运行费用,收益和污染物削减量作为规划目标,对多种方案进行优化选择,建立了实现多目标规划的数学模型,对方案的产生组合,初选和优化等建模过程作了系统介绍,并以泾河水质规划为例,将模型予以应用。 相似文献
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IntroductionChromeleatherscrapisthesolid wasteofleatherindustry .Itsmaincompositionisprotein(mainlycollagenprotein ,globulinandalbumin) ,someCrcompoundbondingwiththeprotein ,alittlecarbohydrate ,fatandsomeinorganics.Thechromeleatherscrapstackedwillputridgra… 相似文献
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《Journal of Cleaner Production》2006,14(5):497-504
Kraft processes require a large volume of water and accordingly a substantial amount of spent liquor; known as black liquor (BL) is produced. Attempts have been made in this study to analyze the performance of BL ultrafiltration using batch stirred rotating disk module. The flux enhancement and the reduction of concentration polarization phenomena have been observed with membrane rotation in this shear enhanced dynamic filtration and correlations have been drawn with different operating variables like transmembrane pressure (TMP), stirrer speed and membrane rotation speed. The rejection of solutes, mostly lignin and lignosulfonates has also been correlated with different operating parameters. Pretreatment centrifugation, followed by microfiltration has been used to remove traces of suspended solids to minimize the chances of membrane fouling. These pretreatment steps proved to be highly efficient in restoring the water flux completely in all the cases of experimentation. The work in this paper was done with specific emphasis on the environmental aspects; accordingly the effect of ultrafiltration on different variables like BOD, COD, oil and grease, total solids, turbidity, etc has been monitored in detail and the reduction in each of these parameters was correlated with different operating variables. Asymmetric cellulose triacetate membrane of 5000-molecular weight cut-off was used for the purpose of experimentation. A very good reduction in each of the aforementioned water quality parameters was observed. The research documented that ultrafiltration of BL with necessary pretreatment can produce good, disposable quality, water and on the other hand it can also provide a sound method for recovery of lignin. 相似文献
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This rapid infiltration (RI) system is proposed as the first one in China. The RI system treated 500 m3/d of municipal and industrial wastewater. About 0.36 ha of field was used. It has been evaluated that the RI system has an excellent ability to treat the wastewater. The infiltration rate was 50.3 m/a. 相似文献