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621.
Performance of microbiological control by a point-of-use filter system for
drinking water purification 总被引:1,自引:0,他引:1
Purification capacity of a faucet mounted type water filter for home use was evaluated, particularly with regard to microbiological
performance under di erent running conditions. Biofilms were formed inside the filter, a ecting the bacterial quality of the e uent
water. Low flow rate, long stagnation period and high filter temperature were found favorable for bacterial growth inside. By commercial
analytical profile index (API) kits, ten di erent bacterial species were identified in drinking water, four of which were probably
contributed to the biofilm formation since they were also present in the biofilm. Fluorescence in situ hybridization (FISH) was used to
confirm the API identification results, and direct viable count (DVC) method was employed to improve the sensitivity of FISH for the
isolated Acinetobacter spp. and Pseudomonas putida as models. Relationship between the filter operating condition and the bacterial
community alteration was partly revealed, which could provide the basic knowledge for the filter design and its practical use. 相似文献
622.
This is the first detailed characterization of the airborne bacterial profiles in indoor environments. Two restaurants were selected for this study. Fifteen genera of bacteria were isolated from each restaurant and identified by three different bacterial identification systems including MIDI, Biolog and Riboprinter®. The dominant bacteria of both restaurants were Gram-positive bacteria in which Micrococcus and Bacillus species were the most abundant. Most bacteria identified were representative species of skin and respiratory tract of human, and soil. Although the bacterial levels in these two restaurants were below the limit of the Hong Kong Indoor Air Quality Objective (HKIAQO) Level 1 standard (i.e., < 500 cfu/m3), the majority of these bacteria were opportunistic pathogens. These results suggested that the identity of airborne bacteria should also be included in the IAQ to ensure there is a safety guideline for the public. 相似文献
623.
鞘细菌细胞吸附Cr(Ⅵ)条件的研究 总被引:2,自引:0,他引:2
采用实验室保藏的鞘细菌,经过液体扩大培养后处理含Cr(Ⅵ)的废液,通过振荡吸附试验考察一系列物理化学因素对吸附效果的影响。结果表明,鞘细菌吸附Cr(Ⅵ)的适宜pH为8.0,适宜温度为30℃,适宜的菌龄是液体培养18h,适宜的吸附时间为8h,适宜的投加量是0.05g/100mL;在Cr(Ⅵ)初始浓度为5mg/L时,吸附量可以达到2.25mg/g,吸附后液体中Cr(Ⅵ)残留仅为0.45mg/L;废水中的有机质浓度对吸附有很大影响,其中COD为100mg/L时可以促进Cr(Ⅵ)的吸附。结果说明鞘细菌可以很好的降低污废水中的Cr(Ⅵ)。 相似文献
624.
625.
626.
A widespread use of acrylamide,probably a neurotoxicant and carcinogen,in various industrial processes has led to environmental contamination.Fortunately,some microorganisms are able to derive energy from acrylamide.In the present work,we reported the isolation and characterization of a novel acrylamide-degrading bacterium from domestic wastewater in Chonburi,Thailand.The strain grew well in the presence of acrylamide as 0.5% (W/V),at pH 6.0 to 9.0 and 25°C.Identification based on biochemical characteristic... 相似文献
627.
628.
《资源节约和综合利用》2011,(9):33-33
近日,美国杜兰大学科学家最新发现了一种新奇的细菌菌株TU-103,其能用报纸制造出成本低且更环保的石油“替身”丁醇。 相似文献
629.
630.
岸边 《辽宁城乡环境科技》2011,(1)
由中国科学院院士工作局、中国工程院学部工作局和科学时报社共同主办,557名中国科学院院士和中国工程院院士投票评选瀚霖杯2010年中国十大科技进展新闻和世界十大科技 相似文献