化学混凝-UASB工艺处理城市生活污水

UASB在处理城市生活污水中有着广泛的应用前景；但在运行过程中，未充分降解的悬浮物易在UASB反应器中堆积，导致已颗粒化的厌氧污泥的活性降低，影响处理效果。作者采用化学混凝预处理法来探讨对UASB的运行影响。通过实验得知化学混凝实现了去除进水中的SS，在FeCl3的投入量为70mg／L，HRT为2h时，UASB的COD去除率达50％～60％。     

IC多功能污水厌氧实验装置的研制

研制了一种用于生活污水或有机工业废水厌氧处理研究的多功能实验装置，该装置可作为IC反应器和UASB反应器分别用于研究在一定的处理效果下的工艺参数的确定、运行参数的确定、颗粒污泥特性研究、三相分离器性能研究、环形布水器性能研究、沼气产率分析等，为学生掌握厌氧污水处理技术提供了坚实的实验基础。     

工程实践中提高UASB反应器处理效率的研究

近年来,有机污水处理技术的应用越来越广泛,尤其是高、中浓度有机污水处理领域。UASB(upflow anaerobic sludge blanket technique)污水处理技术,即上流式厌氧污泥床污水处理技术,主要用于处理高浓度有机废水。该技术是荷兰学者Lettinga等人在1980年提出的,它具有结构简单、负荷率高、水力停留时间短、能耗低和无需污泥回流装置等特点。目前,国外投入运行的生产性试验都取得了较好效果,投入运行的生产性装置已达数百座。国内在应用UASB反应器处理有机工业废水方面也做了大量的试验研究工作,总的来看,工业性生产装置建造的数量有限,尤其在工程实践中如何提高UASB反应器的处理效果、使设备稳定运行等方面的经验不多。     

UASB工艺在污水处理中的应用前景

该文介绍了上流式污泥床(UASB)反应器的工艺特点及其在不同性质的污水处理中的应用情况和处理效果。     

炼油厂碱水水解预处理研究

采用UASB－AF厌氧反应器对炼油厂含碱污水进行预处理，试验结果表明经HRT＝20hr的处理后，碱水的平均B／C达到了0．42，较处理前提高了35％，COD降解率为21％，不仅碱水的污染浓度得到了一定的降低，而且其可生化性得到了较大的改善，为后续处理奠定了较好的基础。     

一体化氧化沟在邢台小黄河南小汪污水处理厂的应用

本介绍了一体化氧化沟处理工业及生活污水的工艺及主要构筑物，其特点是工艺流程短，构筑物和设备少，处理效果稳定可靠，剩余污泥量少，耐冲击负荷，并具有脱氮除磷功能，运行费用低，管理方便，可广泛用于中小型污水处理厂。     

生物炭基纳米零价铁吸附固定厌氧氨氧化污泥的综合实验设计

该实验制备了生物炭基纳米零价铁（nZVI@BC）复合材料用于厌氧氨氧化污泥的吸附固定。实验得出了nZVI@BC固有吸附性能优于生物炭，且nZVI@BC对厌氧氨氧化污泥的吸附更符合准二级动力学模型的结论，证实了nZVI@BC投加量和反应温度对其吸附固定厌氧氨氧化污泥存在显著影响。该项研究为厌氧氨氧化工艺处理低温低氮污水过程中污泥易流失问题提供了一种解决方案，具有一定的应用潜力。     

UASB工艺处理木薯酒精废液生产运行发现

论述了总有效容积2000m3的新型UASB装置,在中温条件下处理高浓度木薯酒精废水的启动运行和污泥含量控制的过程．当反应器稳定运行时,容积负荷可达7kgCOD／（m3·d）,水力停留时间为2d,污泥保持量在30％-41;％,COD去除率达95％以上,出水COD小于500mg／L．     

SBBR工艺对生活污水的脱氮除磷效果分析

通过对SBBR工艺对生活污水脱氮处理效果进行试验研究,确定了该工艺处理生活污水的最佳效果的运行工况,并在最佳工况条件下运行,进一步验证了SBBR工艺对生活污水良好的脱氮除磷效果.     

厌氧氨氧化折流板反应器在城市污水处理中的应用

目前,城市污水处理技术已经是一项成熟的工艺,主要包括活性污泥法和生物膜法.其中,生物膜法由于具有运行稳定、抗冲击负荷、经济节能、无污泥膨胀等的特点而被广泛采用。而组合式厌氧氨氧化折流板反应器是一项新的污水厌氧生物处理技术,具有广泛的应用前景。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.