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31.
企业安全管理存在的问题及对策 总被引:1,自引:0,他引:1
1企业安全管理存在的主要问题 虽然很多企业已认识到了安全的重要性,也认识到了安全工作重在预防,但仍然有一些企业只追求眼前利益,不愿进行安全投入。有些企业的安全管理,长期徘徊于传统的事后管理阶段,平时主要任务是搞检查,发生事故时搞追查,安全工作随着事故的变化而变化^[1]。跟在事故后面,头痛医头,脚痛医脚。 相似文献
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The capillary model was used to analyze the hydraulic conditions in the deep bed filtration process. The physicochemical interaction forces between the filter media and suspended particles and their influence on deep bed filtration process were also studied theoretically. Through the comparison of the hydraulic and physicochemical forces, the key influencing factors on the filtration process were proposed and investigated. Pilot study of the microflocculation deep bed filtration was carried out in the No. 9 Potable Water Treatment Plant of Beijing, and the experimental results of hydraulic head loss, particle distribution and entrapment were presented. The theoretical prediction was reasonably consistent with the experimental results under different conditions, which indicated that the regulation and control of micro-flocculation and deep bed filtration could be realized by the evaluation of the physicochemical interactions. Further theoretical and experimental research should be carried out to investigate the interaction mechanism and its application in the deep bed filtration and other cases. 相似文献
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随着海外河油田聚合物驱采油技术大面积应用,含聚合物(聚丙烯酰胺)污水大量产出。针对含聚污水黏度大、含油多、乳化稳定,采用传统的污水处理方法及设施难以达到油田注水水质标准的问题,在对海外河油田含聚污水水质分析和微生物处理可行性分析的基础上,进行了微生物处理实验,实验表明:经生化处理的污水满足SY/T 5329-2012《碎屑岩油藏注水水质指标及分析方法》。 相似文献
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Estimating the volatilization of ammonia from synthetic nitrogenous fertilizers used in China 总被引:11,自引:0,他引:11
Although it has long been recognized that significant amounts of nitrogen, typically in the form of ammonia (NH(3)) applied as fertilizer, are lost to the atmosphere, accurate estimates are lacking for many locations. In this study, a detailed, bottom-up method for estimating NH(3) emissions from synthetic fertilizers in China was used. The total amount emitted in 2005 in China was estimated to be 3.55 Tg NH(3)-N, with an uncertainty of ± 50%. This estimate was considerably lower than previously published values. Emissions from urea and ammonium bicarbonate accounted for 64.3% and 26.5%, respectively, of the 2005 total. The NH(3) emission inventory incorporated 2448 county-level data points, categorized on a monthly basis, and was developed with more accurate activity levels and emission factors than had been used in previous assessments. There was considerable variability in the emissions within a province. The NH(3) emissions generally peaked in the spring and summer, accounting for 30.1% and 48.8%, respectively, of total emissions in 2005. The peaks correlated with crop planting and fertilization schedules. The NH(3) regional distribution pattern showed strong correspondence with planting techniques and local arable land areas. The regions with the highest atmospheric losses are located in eastern China, especially the North China Plain and the Taihu region. 相似文献
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Leite Luan de Souza Ogura Allan Pretti dos Santos Danilo Vitorino Espíndola Evaldo Luiz Gaeta Daniel Luiz Antonio 《Environmental science and pollution research international》2022,29(24):35800-35810
Environmental Science and Pollution Research - Algal organic matter (AOM) in water reservoirs is a worldwide concern for drinking water treatment; once it is one of the main precursors for... 相似文献