Results 11 to 20 of about 969 (30)

移动床生物膜反应器处理污水的研究应用进展

open access: yesGongye shui chuli, 2004
简单介绍了移动床生物膜反应器(MBBR)的工艺原理,这种反应器不同于其他生物膜反应器的工艺特点。综述了最近国内外应用这种处理方法在工业污水、生活污水以及生物脱氮除磷方面的研究和应用现状。MBBR是集传统活性污泥法和生物膜法优点的一种高效的污水处理方法,针对该项技术目前在国内外的研究应用中存在的问题,指出了它的发展趋势与应用方向。
杨玉旺
doaj   +2 more sources

短HRT下AF深度处理城市污水快速启动实验

open access: yesGongye shui chuli, 2013
采用厌氧生物滤池(AF)对兰州某污水厂二级出水进行深度处理, 在常温短HRT下以两步法——微生物固定化的好氧预挂膜法及复合配水的厌氧启动法进行快速挂膜。实验结果表明:好氧预挂膜阶段生长的丝状菌的网状结构为厌氧微生物的生长提供栖息地, 厌氧启动过程包括好氧微生物的内碳源释放阶段、厌氧微生物的繁殖适应阶段及稳定阶段。AF在启动7周后达到稳定, 对COD去除率可达28%以上。
武福平   +5 more
doaj   +2 more sources

两种检测肺炎克雷伯菌生物膜方法的比较

open access: yesZhongguo shiyan zhenduanxue, 2008
目的银染法与半定量结晶紫染色法检测临床肺炎克雷伯菌株生物膜的敏感性与特异性比较。方法对经Vitek-2鉴定的150株临床肺炎克雷伯菌临床分离株进行生物膜形成实验,分别经银染和结晶紫染色,再随机挑选20株进行扫描电镜检测。结果150株肺炎克雷伯菌中银染法生物膜检出率为38.7%。其敏感性为83%,特异性100%。半定量结晶紫染色法10株菌中生物膜检出率为45%。其敏感性100%,特异性79%。两种方法的检出率无显著性差异。结论银染法和半定量结晶紫染色法均可用于生物膜的检测。
杨朵, 张正
doaj  

硝基芳香化合物废水处理技术研究进展

open access: yesGongye shui chuli, 2023
硝基芳香化合物是一类广泛应用于工业生产的工业化学品,具有生物毒性强、成分复杂、稳定性高等特点,若硝基芳香化合物废水直接进入环境将会对动植物及生态环境造成极大危害。从物理法(吸附法、萃取法、膜分离法)、化学法(电解法、Fenton法、臭氧氧化法、光催化法、膜催化法、湿法氧化法)、生物法(厌氧生物处理、好氧生物处理)、组合工艺4个方面,系统阐述了目前硝基芳香化合物废水处理技术的研究进展;结合最新研究报道以及相关实例,解析现有硝基芳香化合物废水处理技术的优缺点以及未来发展趋势;最后 ...
霍荣帆   +4 more
doaj   +2 more sources

管网内壁生物膜的形成与控制方法研究进展

open access: yesGongye shui chuli, 2007
由于管网系统中存在微量有机物,滋生的细菌会在管道内壁形成厚度不一的附生生物膜。作者就管网内壁生物膜的相关研究进行了综述,以生物膜的形成过程为基础,总结了影响管内壁生物膜的6个因素:水流剪切力、管材、余氯、温度、pH、营养物质。介绍了当前研究中常被使用的两种反应器及取样方法,提出了控制生物膜生长的建议及措施。
任典君   +3 more
doaj   +2 more sources

生物质基纳滤膜的制备及抗菌性能研究进展

open access: yesGongye shui chuli
传统的石油基纳滤膜因其具有能耗低、分离效率高等优点在水处理领域中得到广泛应用,但高碳排、不可生物降解的石油基材料被过度开发,限制了纳滤膜的可持续发展。生物质材料具有零碳排、可再生、产量高、成本低和官能团丰富的特点,是具有天然抗菌性和易抗菌功能化改性的绿色环保型膜材料。以生物质有机高分子壳聚糖、纤维素和木质素为主线,分别从材料分类、特性和抗菌性生物质高分子的合成方法三个方面介绍了膜制备中的生物质原料及其衍生物。总结了基于生物质材料改性的纳滤膜制备方法,包括界面聚合法、层层自组装法和共混法等 ...
丰桂珍   +5 more
doaj   +2 more sources

鲍曼不动杆菌生物被膜与外膜蛋白基因caro关系的研究

open access: yesZhongguo shiyan zhenduanxue, 2017
目的研究鲍曼不动杆菌生物被膜形成与外膜蛋白基因caro表达的关系。方法结晶紫染色法检测鲍曼不动杆菌生物被膜形成能力,采用反转录聚合酶链反应(RT-PCR)比较临床分离鲍曼不动杆菌在生物被膜形成的不同阶段外膜蛋白基因caro表达水平。结果 66.13%的临床分离鲍曼不动杆菌生物被膜形成能力阳性;随着生物被膜形成的成熟,外膜蛋白基因caro的表达水平下调。结论临床分离鲍曼不动杆菌生物被膜形成与外膜蛋白系统密切相关。
赵玉杰   +8 more
doaj  

复合式生物处理系统的研究与应用

open access: yesGongye shui chuli, 2003
介绍了国内外对一种新型生物处理工艺———复合式生物处理系统的研究现状。该系统具有容积负荷高、性能稳定、兼具活性污泥法和生物膜法优点的特性,按填料及生物膜与悬浮污泥组合的方式对复合生物反应器进行了详细的分类,并展望了其应用前景。
刘晋旭, 刘振鸿
doaj   +2 more sources

不同培养条件下对阿萨希毛孢子菌生物被膜影响的研究

open access: yesZhongguo shiyan zhenduanxue, 2011
目的观察不同培养温度和pH培养基对阿萨希毛孢子菌(asahii trichosporon,T.asahii)生物被膜(biofilm,BF)形成的影响。方法以T.asahii聚苯乙烯表面形成生物被膜48 h为评价标准,观察其在20℃,25℃,30℃,35℃和40℃培养温度下观察T.asahii生物被膜的差异性;在30℃培养温度下应用不同pH培养基和采用XTT法测定生物膜活性并定量分析。结果 30℃-35℃下生物被膜形成能力最强,其随着温度不断升高,其生物被膜形成速度加快,但是40℃时稳定性逐渐降低;pH=
樊昕, 任晓萍, 李海涛, 杨蓉娅
doaj  

4种方法检测表皮葡萄球菌生物膜形成能力的应用价值探讨

open access: yesZhongguo shiyan zhenduanxue, 2011
目的比较4种方法检测表皮葡萄球菌体外生物膜形成能力的应用价值,帮助临床选择检测生物膜形成能力的可靠方法。方法用刚果红实验、半定量粘附实验、扫描电镜实验、PCR扩增icaA分别检测临床分离的45株表皮葡萄球菌生物膜的形成能力,经行×列表χ2检验比较阳性检出率,并以扫描电镜检测法为"金标准"计算其他3种方法的灵敏度和特异性。结果 4种方法检出表皮葡萄球菌生物膜形成的阳性率分别为31.1%、40.0%、40.0%、28.9%,无统计学差异(χ2=1.80,P>0.05)。刚果红实验、半定量粘附实验 ...
李燕, 李冬冬, 宋瑱, 陶传敏
doaj  

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