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简易垃圾填埋场封场设计介绍 总被引:1,自引:0,他引:1
简易生活垃圾填埋场封场工程由垃圾堆体整形、终场覆盖、雨水收集与导排、填埋气的导排与处理、渗滤液收集与处理、安全与环境检测等系统组成。结合具体情况,优化设计,最大限度减少垃圾填埋场污染环境,节省投资。 相似文献
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早期的简易生活垃圾填埋场没有采取有效的覆盖、防渗等污染阻断措施,持续产生的高浓度渗沥液对周边环境产生长期的污染危害。以天津某简易生活垃圾填埋场为例,在填埋场边界建设总长为1650 m的水泥搅拌桩垂直防渗帷幕,插入填埋场底部相对隔水层,阻断垃圾渗沥液渗漏对水平向土壤和地下水的污染,确保侧向水平渗透系数不小于10~(-7)cm/s;利用工程地质与地球物理联合勘探技术,在精准识别填埋场底部渗漏通道的基础上,修补填埋场底部渗漏通道,阻断渗沥液对垂向土壤和地下水的污染;采用封场覆盖阻止场地表面雨水进入,减少渗沥液的产生。通过垂直防渗帷幕、原位灌浆补漏和封场覆盖实现三维全方位污染阻断。 相似文献
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填埋作为城市生活垃圾最终处置方式,以工艺简单、投资省、处理量大、运行费用低等特点得到广泛应用。随着城镇居民对生活环境质量要求的提高和城市化进程的加快,垃圾填埋过程产生的恶臭污染问题日益突出;由于没有重视控制地表径流和地下渗水,导致渗沥液产量很大,给后期的渗沥液处理造成很大压力且对土体和周边环境存在着巨大的污染威胁;填埋气的无序排放,存在燃烧、爆炸的安全隐患。对运营管理不规范、设计存在缺陷的垃圾填埋场进行整治迫在眉睫。通过本项目的研究对未按照规范进行作业的填埋场进行有效的环境与安全综合整治,最大化的减小填埋场对周边环境的影响。为我国正在使用的运营管理不规范、设计存在缺陷的生活垃圾卫生填埋场的综合整治提供一定的理论和实践支持。 相似文献
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垃圾渗滤液处理工艺探讨 总被引:2,自引:1,他引:1
国家环境保护部发布的新《生活垃圾填埋场污染控制标准》对生活垃圾渗滤液的处理提出了更高的要求,国内现有的垃圾渗滤液处理大多达不到新标准的要求。文章对我国的生活垃圾渗滤液处理工艺的发展进行了分析和总结,并结合垃圾渗滤液处理工程实例,对为达到新生活垃圾填埋场污染控制标准垃圾渗滤液可以采用的处理工艺进行了探讨。 相似文献
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我国目前有大量的生活垃圾简易填埋场在运行,造成严重的环境污染。简易填埋场的污染主要来源于渗滤液,而渗滤液主要来源于雨水。通过对简易填埋场进行工程技术改造并提高填埋作业水平,能够提高其雨污分流效率,从而有效控制污染。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献