排序方式: 共有11条查询结果,搜索用时 15 毫秒
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纤维素热解液中的主要产物是1,6-脱水-b-D-吡喃葡萄糖(简称内醚糖),通过催化水解内醚糖和脱毒处理,热解液可直接发酵产乙醇. 研究结果表明,在121℃和0.2 MPa条件下的多种催化处理中,0.2 mol/L硫酸处理的热解液获得的葡萄糖产量最高,达17.35%. 水解后含葡萄糖的热解液经Ca(OH)2中和、硅藻土吸附处理,能被Candida krusei YZ-1发酵为乙醇,产率为0.42 g/g(乙醇/葡萄糖), 达理论产率的84%. 而Zymomonas mobilis对于各种处理液的发酵结果都很差. 相似文献
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煤层气在开采的过程中会产生大量伴生水,经过反渗透处理后的浓水中含有Li+等多种离子,本文以山西某煤层气田产出水经反渗透处理后的浓水为样本,按照一定的比例配水进行Li+吸附试验,结果显示:在50℃,不断搅拌,m(Al)/m(Li)为3.3,m(Na)/m(Al)为2.6,2mol/L的NaOH溶液的滴加速率为10mL/min的条件下,反应1.5h后,有明显吸附效果的最低Li+质量浓度为0.5g/L,Li+沉淀率为86.57%。将煤层气田产出水经反渗透处理的浓水浓缩600倍,使其中Li+质量浓度达0.5g/L,按照配水试验条件进行Li+吸附试验,Li+沉淀率为86.17%。 相似文献
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This study presents the first demonstration project in China for treatment of coal-bed methane(CBM) co-produced water and recycling.The work aims to provide a research and innovation base for solving the pollution problem of CBM extraction water.The reverse osmosis(RO) unit is applied to the treatment of CBM co-produced water.The results indicate that system operation is stable,the removal efficiency of the total dissolved solids(TDS) is as high as 97.98%,and Fe,Mn,and F-are almost completely removed.There is no suspended solids(SS) detected in the treated water.Furthermore,a model for the RO membrane separation process is developed to describe the quantitative relationship between key physical quantities-membrane length,flow velocity,salt concentration,driving pressure and water recovery rate,and the water recovery restriction equation based on mass balance is developed.This model provides a theoretical support for the RO system design and optimization.The TDS in the CBM co-produced water are removed to meet the "drinking water standards" and "groundwater quality standards" of China and can be used as drinking water,irrigation water,and livestock watering.In addition,the cost for treatment of CBM co-produced water is assessed,and the RO technology is an efficient and cost-effective treatment method to remove pollutants. 相似文献
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在煤层气田开采过程中将排出大量伴生水,这种伴生水矿化度高、有机污染轻,需进行处理后才能够回用。在分析伴生水用作饮用水可行性的基础上,采用超滤—反渗透(UF—RO)工艺进行规模化处理,结果表明:膜系统运行稳定,UF作为RO进水预处理工艺,对CODMn去除率为29.94%、矿化度去除率9.55%、Cl-去除率8.33%。RO对污染物的去除效果显著,CODMn去除率为66.10%、矿化度去除率97.61%、Cl-去除率94.78%、NH3-N去除率72.94%。经GC-MS分析,系统出水基本不含有机物,水质达到《生活饮用水卫生标准》要求,吨水成本为4.03元。 相似文献
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在实验室采用模拟辐射方法,研究了手机辐射对4个小麦根际群落微生物和对酵母纯群落利用碳源的的影响.Biolog-Eco板测定结果显示:实验室模拟辐射胁迫下,小麦根际微生物群落平均每孔颜色变化率值始终大于对照,证明一定辐射量增强了小麦根际土壤微域内特定微生物种类的生理代谢活性,增加了对碳源的利用.采用Biolog-FF板测定了95种碳源,结果显示:辐射胁迫处理下,酵母菌Saccharomyces cerevisiae对碳源的嗜好性发生了变化,辐射增强了S.cerevisiae对D-半乳糖、水苏糖、D-松三糖、异麦芽酮糖/帕拉金糖、D-蜜三糖/棉子糖、戊五醇/核糖醇、D-纤维二糖、L-鼠李糖的利用,降低了利用5'-磷酸腺苷和腺苷生长的能力.这些研究结果显示900MHz微波辐射对于微生物代谢参数存在着明显影响,这为研究手机辐射污染与人体健康的关系提供了某些参考. 相似文献
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