共查询到20条相似文献,搜索用时 62 毫秒
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氮和磷的控制在污水处理和污水处理装置的设计中越来越重要.因为只有氮和磷两者合起来才能改变水质的特性,因此去除其中一种或两者都去除就可以实现控制手段.根据氮在水中的存在形态及其危害,介绍了炼油污水中氮的分布及其去除方法.去除方法中主要介绍了两种:一种是SBR(Sequencing batch reactor ,间歇式或序批式活性污泥法),第二种是A/O脱氮工艺. 相似文献
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烟气脱硫脱氮技术进展 总被引:2,自引:0,他引:2
从烟气脱硫脱氮技术的机理出发,介绍了目前有代表性的3类烟气净化技术:烟气脱硫技术、烟气脱氮技术、烟气同时脱硫脱氮技术的机理和特点。相比于单独的脱硫脱氮技术,认为同时脱硫脱氮技术具有良好的经济性和灵活的技术选择性。提出了适合我国国情的烟气污染治理技术的发展方向。 相似文献
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膜生物反应器强化脱氮除磷工艺优化与控制 总被引:2,自引:0,他引:2
随着城镇污水排放标准对氮、磷等营养元素的进一步提高,对于传统污水处理工艺来讲是一种挑战.膜生物反应器工艺技术以其独特的优势备受关注,在强化脱氮除磷方面亦表现出优于传统工艺的特点.非传统脱氮除磷的观念的后置反硝化工艺(无外加碳源)在膜生物反应器中得到了应用,并取得良好的去除营养物的效果.从现有的MBR脱氮除磷工艺着手,分析探讨了MBR脱氮除磷工艺研究进展及其应用前景. 相似文献
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介绍了在三星公司石化厂5 000t/a白油装置设计中,对磺化工艺路线进行优化所收到的实际效果。 相似文献
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随着我国社会和经济的高速发展,对能源的需求量不断增加,尤其是在私家车的数量得到不断增长之后,对石油资源的需要量更是每日剧增。原油脱水在石油资源生产过程中,发挥着非常重要的作用。为了提高原油技术的效率,就需要做好工艺的优化处理。 相似文献
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简要介绍了火车槽车卸油采用的4种工艺流程,即真空抽卸、滑片泵(转子泵)卸油、离心泵与滑片泵(转子泵)相结合卸油、潜油泵卸油,以及底油扫仓的3种工艺流程,即真空扫仓、泵抽吸底油、潜油泵抽吸.并对4种卸油工艺和3种扫仓工艺的优、缺点进行了比较分析. 相似文献
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Ramin Ghorbanzadeh Karamatollah Rezaei 《Journal of the American Oil Chemists' Society》2017,94(12):1491-1501
Response surface methodology employing a five-level, four-variable central composite rotatable design was applied to study the effects of extraction time, extraction temperature, pH and water/solid ratio on the extraction yield of pomegranate seed oil using an aqueous extraction approach. In addition, quality indices, fatty acid composition and antioxidant activity of the obtained oil were studied and compared with those of typical hexane-, cold press- and hot press-extracted oil. Aqueous extraction resulted in the maximum oil recovery of 19.3% (w/w), obtained under the following critical values: water/solid ratio (2.2:1.0, mL/g), pH 5.0, extraction temperature = 63 °C and extraction time = 375 min. This yield is lower than that obtained via hexane extraction (26.8%, w/w) and higher than the yields from cold press (7.0%, w/w) and hot press (8.6%, w/w) extraction. A comparison of the characteristics of the oils based on extraction method revealed that the unsaturated fatty acid content was highest for the oil obtained by aqueous extraction. In addition, higher levels of iodine and peroxide and lower levels of acid, p-anisidine and unsaponifiable matter were observed. The oil obtained with aqueous extraction also exhibited higher antioxidant activity than oils obtained by hexane or hot press extraction. 相似文献