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排序方式: 共有112条查询结果,搜索用时 15 毫秒
101.
102.
垃圾卫生填埋是当今世界各国城市垃圾处理的主要方式。工程以马鞍山市生活垃圾卫生填埋为例提出了相应的防止渗滤液污染地下水的控制措施,并根据渗滤液的处理试验,确定了渗滤液处理工程的工艺流程。 相似文献
103.
论防灾工程投资经济效果评价的一般方法 总被引:7,自引:2,他引:7
本文根据防灾工程的特点,提出了防灾工程投资、灾害损失和防灾工程投资经济效果,以及投资风险分析的一般方法,从而为防灾工程投资的最优化决策提供依据。 相似文献
104.
Crumb rubber can be produced from scrap tires in a wide range of particle sizes and quality levels. Ideally, the revenue stream includes tipping fees paid to receive the raw materials; sales of variously-sized crumb products to different end-user markets; and potential sales of scrap metal and fiber contained within the tires. General demand has been increasing, and submarkets for crumb products are growing in size and variety. However, the optimistic expectations of potential investors and government agencies contrast sharply with the experiences of many current and former producers. Production planning and operation is complex, real-dollar crumb prices have fallen, and many producers recount difficulties finding stable markets and competing against newer, state-subsidized competitors. This paper examines the engineering economics of crumb rubber facilities. Following a literature review and interviews with producers, a financial model of a nominal processing operation was created to aid the analysis of different market, crumb size, and production scenarios. The profitability of a crumb facility appears to be particularly sensitive to crumb rubber prices, operating costs, and raw material availability. Better analysis of market and production impacts on financial viability for proposed processing facilities would aid overall market efficiency. 相似文献
105.
《防灾减灾工程学报》的被引分析 总被引:1,自引:1,他引:0
利用我国优秀博硕论文全文数据库,探讨了《防灾减灾工程学报》(以下简称《学报》)的被引与共被引。结果表明,《学报》的载文具有较高的学科前沿性、理论性、实用性与综合性;《学报》的博硕论文被引与共被引次数多、层次高,学术影响的学科范围广;防灾减灾工程与土木工程、岩土工程、地震工程、地质工程等多种工程相关性强;《学报》对我国博硕研究生教育情报贡献力大。 相似文献
106.
Yan Ma Xiaoming Du Yi Shi Deyi Hou Binbin Dong Zhu Xu Huiying Li Yunfeng Xie Jidun Fang Zheng Li Yunzhe Cao Qingbao Gu Fasheng Li 《Frontiers of Environmental Science & Engineering》2016,10(6):6
In recent years, many industrial enterprises located in the urban centers of China have been relocated owing to the rapid increase in urban development. At the sites abandoned by these enterprises, volatile organic compounds have frequently been detected, sometimes at high concentrations, particularly at sites abandoned by chemical manufacturing enterprises. With the redevelopment of sites and changes in land-use type associated with these sites, substantial amounts of contaminated soils now require remediation. Since China is a developing country, soil remediation warrants the usage of techniques that are suitable for addressing the unique challenges faced in this country. Land shortage is a common problem in China; the large numbers of contaminated sites, tight development schedules, and limited financial resources necessitate the development of cost-effective methods for land reclamation. Mechanical soil aeration is a simple, effective, and low-cost soil remediation technique that is particularly suitable for the remediation of large volatile organic compound-contaminated sites. Its effectiveness has been confirmed by conducting laboratory studies, pilot tests, and full-scale projects. This study reviews current engineering practice and developmental trends of mechanical soil aeration and analyzes the advantages and disadvantages of this technology for application in China as an emerging soil remediation market. The findings of this study might aid technology development in China, as well as assist other developing countries in the assessment and implementation of costeffective hazardous waste site soil remediation programs.
相似文献
107.
灾害防御工程的费用和效益问题浅议 总被引:5,自引:1,他引:4
在分析现有的灾害防御工程费用效益计算方法的基础上,提出灾害防御工程应遵循从整个国家和社会的角度进行分析的原则,并对如何应用国民经济评价方法,以影子价格来衡量灾害防御工程项目对国民经济的真正影响作了初步的讨论。这对于正确评价和选择灾害防御工程方案有重要的理论和现实意义。 相似文献
108.
价值工程在环境监测仪器设备建设中的应用 总被引:1,自引:0,他引:1
在环境监测仪器设备建设中应用价值工程原理和方法,对仪器设备配置方案进行评估.结果表明,价值工程有利于合理地配置各类仪器设备,选择与其功能相适应的成本价位,充分发挥仪器设备建设资金的使用效益,提高环境监测总体能力. 相似文献
109.
110.
采用锅炉节能节水近零排放成套技术对企业锅炉系统进行改造,保证企业锅炉在零排污工况下的安全、经济运行,降低了企业能源和水资源消耗,减少污染排放,降低企业生产成本,增强企业竞争力,具有安全、节能、节水、减排等特点。实践证明:锅炉吨蒸汽补水量从1.5m^3下降到0.073m^3;吨蒸汽废水排放量从1.4m^3下降到0.004m^3;吨蒸汽耗煤量由168.3kg下降到152.3k;锅水溶解固形物从3000mg/L下降到2100mg/L;碳钢腐蚀率≤0.001mm/a、阻垢率≥99.95%。2台35t/h中压锅炉年可节约费用825.3万元。 相似文献