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用系统论观点剖析了企业资产的动态系统性,提出了建立资产评估指标体系的原则及应用模糊数学方法对企业资产价值进行评估。对已经广泛应用的其它各种资产评估方法,不是取代,而是在理论和方面的一个具有新颖性的补充。 相似文献
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通过大量的资料调研和类比分析,介绍了采油废水中的主要污染物,对现有采油废水生物处理技术中常用的几种方法的原理、特点、应用情况等进行了详细论述,并对采油废水生物处理技术的发展趋势进行了展望。 相似文献
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本文结合其在工作中发现的能力验证计划中数据处理发现的电子表格的函数处理和人工处理结果的不尽相同,查找和分析产生的原因,提出在组织和实施实验室能力验证计划时,须将是应用电子表格的函数处理,还是人工计算处理进行明显的说明。 相似文献
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随着工业的发展,污水成分已愈来愈复杂。某些难降解的有机物质和有毒物质,需要运用微生物的方法进行处理,污水具备微生物生长和繁殖的条件,因而微生物能从污水中获取养分,同时降解和利用有害物质,从而使污水得到净化。污水生物处理是利用微生物的生命活动,对污水中呈溶解态或胶体状态的有机污染物降解作用,从而使污水得到净化的一种处理方法。污水生物处理技术以其消耗少、效率高、成本低、工艺操作管理方便可靠和无二次污染等显著优点而备受人们的青睐。 相似文献
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本文介绍了在能力验证协调活动中,用Microsoft Excel中的数据分析、统计图表和函数功能处理能力验证数据,用Microsoft Word中的邮件合并功能处理标签、报告和通知的一些技巧和经验,以期对实验室在实施能力验证计划协调工作时有所帮助。 相似文献
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评估验证高功率密度电机、风电及轨道交通等机电设备的监控质量,保障机电系统的安全、绿色运行,对于推动国家绿色制造战略实施意义重大.然而,现有针对物联网监测系统的完整性验证评估方法,仅评估了系统监测设备和集成终端的完整性,忽视了传感监控数据采集与汇聚过程中的安全威胁;再者,现有技术对监控系统评估和验证仅在项目验收或者出现问... 相似文献
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组织开展能力验证,提高实验室技术能力 总被引:1,自引:0,他引:1
1 目的和意义
能力验证是为确定实验室进行某些特定检测或测量的能力,以及监控实验室的持续能力而进行的实验室间比对。通常,认可机构可以通过两种技术手段来评价实验室的能力:一是派出评审组按照标准要求对实验室进行现场能力评估;二是通过能力验证来评价实验室的能力。二者结合,互相补充,以确保实验室工作的可信度和有效性。 相似文献
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采用纳滤膜、反渗透膜分离技术对含锰废水进行了试验研究.考察了纳滤膜的操作压力、纯水/浓水比值、Mn2+浓缩倍数、Mn2+截留率及膜通量之间的关系.试验结果表明:纳滤膜对含锰废水有良好的处理效果,一级纳滤膜对Mn2+离子的平均截留率大于98%;浓缩倍数和膜通量随操作压力的升高而升高,2.0 MPa时,浓缩倍数可以达到8.2倍,膜通量可达到28~32 L/(m2·h).一级纳滤产生的纯水用反渗透膜进一步处理,反渗透膜对Mn2+离子的截留率在97%以上,纯水Mn2+离子浓度在0.5 mg/L以下,可以达标排放. 相似文献
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In this study, acidic latex wastewater containing high average zinc and acetic contents of 816mgL(-1) and 20,862mgCODL(-1), respectively, was treated successfully by a series of chemical and biological processes without any addition of acid or base for pH adjustment. Total dissolved solids of the treated effluent increased by only 1.1-fold on average for sulfide precipitation as compared to 2.8-fold for the hydroxide strategy. The oxidation-reduction potential (ORP) value of 0mV was used successfully as an indicator for optimum sulfide addition which consistently provided an appreciable reduction in effluent concentrations to less than 1 and 2mgL(-1) for zinc and residual sulfide, respectively. The anaerobic filter was very stable in handling the chemically treated wastewater up to the organic loading rate of 11.8gCODL(-1)day(-1) with an average efficiency of 92%. Methane production and biomass yield were 0.32L(gCOD(removed))(-1) and 0.014gVSS (gCOD(removed))(-1), respectively. For the activated sludge process, the optimum sludge age and hydraulic retention time were 30 and 0.8 days, respectively, which are equivalent to the organic loading rates of 2.50gCODL(-1)day(-1) or 2.13gBODL(-1)day(-1). Under these optimum conditions, average removal efficiencies for COD and BOD were 96.6 and 99.4%. Average soluble COD, BOD and suspended solids in the effluent were 71, 11 and 38mgL(-1), respectively. This integrated treatment scheme was proven to be an effective approach for highly polluted and toxic rubber thread wastewater. 相似文献
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Optimization of the aerobic biological treatment of thermophilically treated refractory wastewater 总被引:1,自引:0,他引:1
A pilot scale conventional activated sludge was operated for over 600 days to study its effectiveness at further remediating the effluent of an existing industrial site's thermophilic biological treatment stage. During the course of the study, the activated sludge was able to further biodegrade the contaminants in the incoming industrial wastewater in terms of both BOD and nitrogen reductions at varying hydraulic and solids retention times, despite elevated concentrations of soluble copper being present. A limiting hydraulic retention time (HRT) for BOD removal of 1.5 days was observed as well as the loss of nitrification occurred at a solids retention time (SRT) of approximately 6 days. Biokinetic coefficients were determined with the maximum rate of substrate utilization per unit mass of microorganisms, k, of 0.14 mgVSS/(mgsBOD-d) and the Monod half velocity constant, K(s), of 9.4 mgsBOD/L. Simultaneous nitrification and denitrification (SND) of the nitrogenous compounds found in this wastewater was observed throughout the majority of the experimentation while the bulk DO in the system was greater than 1 mg/L. The activated sludge was estimated to contain soluble copper on the order of 1 mg/L throughout the course of operation with no apparent detriment to nitrification. Additionally, the activated sludge was able to biologically remove the main solvents found in the influent wastewater. The removals of trace levels of N-nitrosodimethylamine (NDMA) were also observed. 相似文献