杂酚废水对厌氧颗粒污泥微生物影响

为去除生产双酚A工业废水中的苯酚、丙酮、双酚A以及溶解于丙酮中很多难以监测的含酚类成分,通过厌氧颗粒污泥静态培养及驯化,验证其厌氧微生物对此类废水的适应性及处理效果．在颗粒污泥对该杂酚废水的静态适应性实验中,其微生物对该杂酚废水有较好的适应性,6 h的接触时间就可以使原水的COD降低约58％．驯化及连续运行60 d后在水力停留时间为9 h时,可使COD去除率达50％．利用扫描电镜观察反应器内实验前后的颗粒污泥,发现其内部和表面微生物均有很大的差异．     

Creo在发动机曲柄滑块机构运动仿真分析中的应用

分析了发动机的工作原理,建立了发动机结构中的曲柄滑块机构模型,研究了该曲柄滑块机构在Creo软件环境中的运动仿真分析。实现快速完成机构设计的同时对所设计结果进行了初步分析检验,节约了利用实际产品做实验所需的时间、人力和财力。通过实例验证了参数化设计的曲柄滑块机构在虚拟装配之后的运动学仿真。     

《现代深孔加工技术》评介

~~《现代深孔加工技术》评介@潘鑫$哈尔滨工业大学出版社!哈尔滨150006 @贾学斌$哈尔滨工业大学出版社!哈尔滨150006     

Effects of temperature on the degradation pathway of domestic sewage in upfiow anaerobic sludge blanked reactor

To understand the anaerobic degradation pathway of domestic sewage,three lab-scale upflow anaerobic sludge blanked reactors(UASB)were employed to study the degradation pathway of different particle size and the effect of temperature on this process.Under the operation conditions of the hydraulic retention time of 24 h,the MI,VSS of approximate 11200 mg· L-1 and the water temperature at 10,15 and 20℃,the overall degradation pathway of soluble fraction was characterized according to zero-order kinetics.As for the colloidal fraction(between 0.45 and 4.5 μm),the degradation processes followed a first-order kinetic,and should firstly disintegrated into soluble fraction before finally degrading.In contrast,suspended solids(bigger than 4.5 μm)degraded to soluble and colloidal fractions according to first-order kinetics,and the colloidal fraction originating from suspended solids further degraded into soluble fraction which had the same degradation kinetics as the original soluble fraction.There existed the difference of temperature effect on different fraction degradation.Under the temperature at 20,15 and 10 ℃,the first-order rate constant of suspended solids depredating into collide was 4.97,3.01 and 1.01 d-1 respectively.Whereas the degradation of collide to soluble fraction was slightly affected by the temperature change.On the other hand,the zero-order degradation rate constant of soluble fraction was 0.26,0.18 g and 0.12 gCOD · gVSS-1d-1,respectively.     

反硝化聚磷菌富集、筛选及其特性

为进一步探讨反硝化除磷机理和提供脱氮除磷功能菌株,对A2SBR快速富集驯化并筛选其中反硝化聚磷菌功能菌.采用控制A2SBR进水及运行方式对反硝化聚磷菌进行快速富集筛选,并将所筛菌株进行复配研究,为构建脱氮除磷菌剂奠定基础.两段进水和提高注水比的运行方式能使反硝化聚磷菌在反应器中迅速成为优势菌.实验分离得到效果较好的反硝...     

水源热泵深井水循环系统的分析与研究

文章以中美节约能源和保护环境合作示范项目——水源热泵深井水循环系统作为研究对象，分析深井水温度和回灌水量对水源热泵机组换热能力的影响，讨论水源热泵系统两种回灌技术。     

膨胀颗粒污泥床厌氧反应器的快速启动研究

以膨胀颗粒污泥床（EGSB）反应器生产实践为基础进行的处理模拟生活污水的试验发现：在启动过程中，接种污泥含有厌氧颗粒污泥菌种和适量的絮状厌氧污泥可以加快反应器启动；采用添加微量金属营养元素和进水COD负荷基本不变及稳定后增加负荷的三段式进水操作方式，有助于颗粒污泥的形成和加快反应器的启动；在培养过程中出现的反应器壁膜对颗粒污泥的生成可起到促进和辅助作用，并能提高反应器的抗冲击负荷能力。研究结果对EGSB反应器的生产实践具有重要的指导作用，可作为反应器实际运行的参考依据。     

Effects of temperature on the degradation pathway of domestic sewage in upflow anaerobic sludge blanked reactor

To understand the anaerobic degradation pathway of domestic sewage,three lab-scale upflow anaerobic sludge blanked reactors (UASB) were employed to study the degradation pathway of different particle size and the effect of temperature on this process.Under the operation conditions of the hydraulic retention time of 24 h,the MLVSS of approximate 11200 mg·L-1 and the water temperature at 10,15 and 20℃,the overall degradation pathway of soluble fraction was characterized according to zero-order kinetics.As for the colloidal fraction (between 0.45 and 4.5 μm),the degradation processes followed a first-order kinetic,and should firstly disintegrated into soluble fraction before finally degrading.In contrast,suspended solids (bigger than 4.5 μm) degraded to soluble and colloidal fractions according to first-order kinetics,and the colloidal fraction originating from suspended solids further degraded into soluble fraction which had the same degradation kinetics as the original soluble fraction.There existed the difference of temperature effect on different fraction degradation.Under the temperature at 20,15 and 10 ℃,the first-order rate constant of suspended solids depredating into collide was 4.97,3.01 and 1.01 d-1 respectively.Whereas the degradation of collide to soluble fraction was slightly affected by the temperature change.On the other hand,the zero-order degradation rate constant of soluble fraction was 0.26,0.18 g and 0.12 gCOD·gVSS-1d-1,respectively.     

既有办公建筑大堂地板辐射供冷供暖系统节能改造方案可行性研究

以北京市某既有办公建筑的大堂为研究对象,针对北京地区的气候条件和大堂建筑的空调负荷特性,基于地板辐射供冷供暖技术的基本理论和原理,对该大堂原有的空调方式进行了节能改造,将原来的地板辐射供暖系统改为地板辐射供冷供暖系统。2009年夏季供冷工况运行结果表明,该改造方案不但可满足建筑热舒适性及使用功能要求,而且节能效果显著。     

数码相机——信息时代的新宠儿

每逢记者招待会，或记者新闻采访，我们都可以看到记者们肩背着、手提着各式光学相机──长镜头的、短镜头的、机械的、自动的──叮咛咣啷一大串，俨然一出海人回来背着的一串螃蟹。现在我想，“老记”们手上肩上一定又要多一种相机──数码相机。一、什么是数码相机数码相机也叫数字相机，是光、机、电一体化的产品。它的核心部件是CCD（ChargeCoupleDevice，电荷耦合元件）图像传感器。它使用一种高感光度的半导体材料制成，在光线作用下，可将光线作用强度转化为电荷的积累，再通过模数转换芯片转换成数字信号，数字信号经过压缩以后…