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大量煤矸石露天堆积极易失稳,对邻近的耕地、林木和居民区构成严重威胁.以晋城某矸石山注浆加固治理工程为例,以现场原位测试为主,采用重型圆锥动力触探试验、孔内波速测试、注浆结石体室内试验、变形观测及边坡稳定性评价等方法对注浆效果进行综合评价,结果显示注浆质量合格,矸石山治理后整体稳定性较好. 相似文献
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对煤矸石堆积现状及存在问题进行了分析,从矸石山治理方面进行了详细论述,提出了对矸石山进行削坡覆土及注浆灭火的方法,以解决矸石山环境污染问题。 相似文献
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李荣 《建筑节能(中英文)》2023,(11):139-145
自燃矸石山因造成严重环境污染和诱发地质灾害引起人们极大关注。然而,矸石山内部蕴含丰富的热能资源往往被人们忽视。为了治理矸石山自燃并利用其内部丰富的热能资源,开展了重力热管群治理矸石山自燃试验及热能利用效果研究,计算了热能资源存储量并提出了不同热能利用模式。结果表明:(1)经过为期90 d的重力热管群治理,矸石山内部温度呈现出不同程度的下降,下降的最大温度超过120℃。(2)分析降温半径可知,重力热管有效控温半径为2 m。半径为1 m的区域范围内,温度降幅可达到15℃。(3)大垴梁自燃矸石山10 m深度内蕴藏的热能资源量约为7.83×1013 J。热能资源可用于建筑供暖、温室大棚供暖和热电转化发电。 相似文献
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在对潞安矿区矸石山调查分析的基础上,结合数值模拟技术对矸石山的稳定性进行了分析模拟,同时考虑了自燃对矸石山稳定的影响,结果表明自燃直接影响到矸石山的稳定性,矸石山治理中应充分考虑自燃的影响。 相似文献
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很多煤矿企业由于历史原因面临着煤矸石山的治理问题,煤矸石山由于长时间的堆积,通风条件差,内温度积聚上升,产生了矸石自燃现象,长时间的燃烧已至地表,治理难度大,自燃火灾治理施工主要采用注浆灭火的工艺。 相似文献
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为探讨高负荷条件下复合式UASB反应器中厌氧氨氧化反应的脱氮性能和稳定性,在已经成功启动并稳定运行的厌氧氨氧化反应器中,通过提高进水总氮浓度和缩短水力停留时间两种方式提高总氮负荷,考察脱氮效果。结果表明,通过逐步提高进水总氮浓度和缩短HRT可以提高厌氧氨氧化反应的总氮负荷,并获得理想的脱氮效果和运行稳定性,但过高的亚硝态氮浓度会对反应产生一定的抑制作用。 相似文献
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Granules from an industrial UASB reactor were maintained in bench scale (201.) UASB reactors and fed with a synthetic medium based on volatile fatty acids.
After 60 days of reactor operation, three distinct granule types were found to have evolved within the reactors. These types were defined by their colour: black, grey and white. These granules also differed in structure (texture) and elemental composition. The proportion of black, grey and white granules in the bed changed when the organic loading rate was changed. At the low loading rate, a large number of “hollow” granules appeared which were less dense than the liquid and were washed out at the top of the reactor. 相似文献
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亚硝化-厌氧氨氧化组合工艺脱氮研究 总被引:7,自引:0,他引:7
以高氨氮模拟废水为研究对象,对影响亚硝化-厌氧氨氧化组合工艺脱氮效果的几个因素(DO、pH、碱度、有机物浓度、NU4^+-N/NO2^-—N值)进行了考察,以期获得组合工艺的最佳运行方式。研究结果表明,在亚硝化温度为23~26℃,HRT=1d,进水NH4^+-N、TN浓度分别为350、420mg/L,ANH4^+-N/ANO2^--N值为0.8~1.33的条件下,组合工艺对NH4^+-N、TN的最高去除率分别为99.9%、90.8%,平均去除率分别为96%、76.1%。组合工艺的脱氮效率严重受限于亚硝化系统出水的NH4^+-N/NO2^--N值及其稳定性。 相似文献
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基于FDS建立沼气泄漏扩散模型,分别模拟管道接头破损、导凝管阀门破损和沼气突破水封,探究厌氧反应器中沼气泄漏扩散的基本规律.结果表明:当管道接头破损、导凝管阀门破损时,沼气泄漏后的危险范围为下风向处距离泄漏口约5m;当沼气突破水封时,沼气泄漏后的危险范围为下风向处距离泄漏口约60 m;沼气突破水封的危险性最大;泄漏后的... 相似文献
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Impact of inocula and growth mode on the molecular microbial ecology of anaerobic ammonia oxidation (anammox) bioreactor communities 总被引:2,自引:0,他引:2
The composition of distinctly inoculated granular anammox and biofilm-based completely autotrophic nitrogen removal over nitrite (CANON) bioreactors was investigated from start-up through continuous long-term operation via denaturing gradient gel electrophoresis (DGGE) and sequencing. The granular anammox reactor was seeded with sludge from an operational anammox reactor in Strass, Austria. The CANON reactor was seeded with activated sludge from a local wastewater treatment plant in New York City. The principal anammox bacteria (AMX) shifted from members related to Kuenenia stuttgartiensis present in the initial inoculum to members related to Candidatus Brocadia fulgida during pre-enrichment (before this study) and to members related to Candidatus Brocadia sp. 40 (during this study) in the granular reactor. AMX related to C. Brocadia sp. 40 were also enriched from activated sludge in the CANON reactor. The estimated doubling times of AMX in the granular and CANON reactors were 5.3 and 8.9 days, respectively, which are lower than the value of 11 days, reported previously. Both the granular anammox and CANON reactors also fostered significant amounts of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB). The fractions of AMX and two groups of NOB were generally similar in the granular anammox and CANON reactors. However, the diversity and fractions of AOB in the two reactors was markedly different. Therefore, it is suggested that the composition of the feed and extant substrate concentrations in the reactor likely select for the microbial community composition more than the inocula and reactor configuration. Further, such selection is not equivalent for all resident communities. 相似文献
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介绍了UASB反应器处理高浓度葡萄糖有机废水的试验材料及方法,分析了UASB的运行过程及结果,对不同运行时期UASB反应器内颗粒污泥的性质进行了研究,以促进UASB的应用。 相似文献
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介绍了DE型氧化沟工艺,通过具体工程实例,阐述了前置厌氧段DE氧化沟工艺流程,分析了污水处理的实际运行情况,分析表明DE氧化沟具有良好的有机污染物去除效果,良好的脱氧效果和除磷效果。 相似文献