全文获取类型
收费全文 | 54篇 |
免费 | 3篇 |
国内免费 | 12篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 3篇 |
环保管理 | 2篇 |
综合类 | 52篇 |
基础理论 | 3篇 |
污染及防治 | 2篇 |
社会与环境 | 3篇 |
出版年
2023年 | 1篇 |
2021年 | 2篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 1篇 |
2012年 | 4篇 |
2011年 | 4篇 |
2009年 | 7篇 |
2008年 | 5篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2005年 | 7篇 |
2004年 | 4篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
排序方式: 共有69条查询结果,搜索用时 218 毫秒
61.
62.
63.
64.
ERIC-PCR指纹图谱技术对低温下SUFR反应器中菌群结构分析 总被引:2,自引:0,他引:2
使用ERIC-PCR指纹图谱技术对螺旋升流式反应器(Spiral Up-Flow Reactor,SUFR)在低温下的微生物群落结构进行了分析.结果表明,低温下反应器中微生物菌群呈多样性分布,优势菌群突出;在遭受约5℃低温条件冲击后,反应器中菌群多样性和反应器脱氮除磷效率都有所降低,但TN去除率和TP去除率仍然达到了72.35%和93.28%,维持了反应器的正常功能.不同温度下对比分析可以看出,在低温和常温下反应器中优势菌群发生了一定变化,常温条件下的优势菌群比低温条件下更丰富多样.总体看来,SUFR反应器良好的螺旋升流特质有利于不同菌群在不同温度下的功能发挥,特别是低温下脱氮除磷功能的维持. 相似文献
65.
66.
67.
分置式膜-生物反应器处理生活污水的抗冲击负荷能力 总被引:8,自引:0,他引:8
分置式膜 -生物反应器处理生活污水的运行结果表明 ,在 3倍于正常水平的冲击负荷下 ,分置式膜 -生物反应器能够正常运行 ,膜过滤出水 COD维持在 1 0 mg/ L以下 ,生物反应器污泥上清液 COD和透膜压力 TMP比正常水平略微上升 ,但在冲击负荷消除后能够恢复正常水平 ,呈现出较强的抗冲击负荷能力 .分置式膜 -生物反应器与普通活性污泥法相比 ,在冲击负荷下 ,其有机物去除速率、污泥浓度都呈现较快增长 ,而污泥混合液 COD浓度上升幅度较小 ,并且在冲击负荷消除后迅速恢复稳态运行 .分析表明分置式膜 -生物反应器的强抗冲击负荷能力来自于膜对污泥的完全截流作用 .膜 -生物反应器的强抗冲击负荷能力意味着该技术出水水质的安全稳定性和操作简便性 . 相似文献
68.
A. Kleyböcker T. Lienen M. Liebrich M. Kasina M. Kraume H. Würdemann 《Waste management (New York, N.Y.)》2014,34(3):661-668
In order to increase the organic loading rate (OLR) and hereby the performance of biogas plants an early warning indicator (EWI-VFA/Ca) was applied in a laboratory-scale biogas digester to control process stability and to steer additive dosing. As soon as the EWI-VFA/Ca indicated the change from stable to instable process conditions, calcium oxide was charged as a countermeasure to raise the pH and to bind long-chain fatty acids (LCFAs) by formation of aggregates. An interval of eight days between two increases of the OLR, which corresponded to 38% of the hydraulic residence time (HRT), was sufficient for process adaptation. An OLR increase by a factor of three within six weeks was successfully used for biogas production. The OLR was increased to 9.5 kg volatile solids (VS) m?3 d?1 with up to 87% of fat. The high loading rates affected neither the microbial community negatively nor the biogas production process. Despite the increase of the organic load to high rates, methane production yielded almost its optimum, amounting to 0.9 m3 (kg VS)?1. Beneath several uncharacterized members of the phylum Firmicutes mostly belonging to the family Clostridiaceae, a Syntrophomonas-like organism was identified that is known to live in a syntrophic relationship to methanogenic archaea. Within the methanogenic group, microorganisms affiliated to Methanosarcina, Methanoculleus and Methanobacterium dominated the community. 相似文献
69.
Bowyer TW Biegalski SR Cooper M Eslinger PW Haas D Hayes JC Miley HS Strom DJ Woods V 《Journal of environmental radioactivity》2011,102(7):681-687
We report on the first measurements of short-lived gaseous fission products detected outside of Japan following the Fukushima nuclear releases, which occurred after a 9.0 magnitude earthquake and tsunami on March 11, 2011. The measurements were conducted at the Pacific Northwest National Laboratory (PNNL), (46°16′47″N, 119°16′53″W) located more than 7000 km from the emission point in Fukushima Japan (37°25′17″N, 141°1′57″E). First detections of 133Xe were made starting early March 16, only four days following the earthquake. Maximum concentrations of 133Xe were in excess of 40 Bq/m3, which is more than ×40,000 the average concentration of this isotope is this part of the United States. 相似文献