共查询到20条相似文献，搜索用时 62 毫秒
1.
《实验室研究与探索》2017,(4):33-36
化工废水存在有机物浓度高,含盐量大,常规工艺难处理的问题。为了减少后续水处理系统处理难降解物质的量,增加其可生化性,将活性炭负载铁进行改性,从而实现提高活性炭的催化性能。通过对比不同工艺对化工废水可生化性的影响,当改性活性炭投加量2 g/L,臭氧投加量2 mg/L时,反应60 min后改性活性炭催化臭氧氧化处理后BOD_5/CODCr达到0.304,可生化性提高了90%以上,利于下一步生化处理。实验表明,催化剂的性质稳定,多次使用后催化效果改变不大。 相似文献
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文章采用臭氧氧化法对焦化废水进行处理,研究反应时间、pH和温度3个不同的因素对焦化废水可生化性的影响．结果表明：在臭氧发生量一定的情况下,在反应时间为20min,pH为9,温度为常温时,焦化废水的可生化性可以提高到0.300以上． 相似文献
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余宗学 《周口师范学院学报》2003,20(2):31-33
介绍了用电化学还原法对含硝基苯废水进行预处理的试验结果，对于硝基苯含量约1000mg／L的模拟废水，经过电化学还原法的处理，硝基苯的去除率可达到70％以上，并且生化性大大提高．出水可以被生物处理， 相似文献
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采用厌氧和好氧生物滤池组合工艺,对某炼油厂废水进行了生化处理,并采用Fenton氧化对该废水进行深度处理。实验结果表明,该废水经生化处理后氨氮即可达标排放,经三级污水处理工艺处理后的废水CODCr去除率达到97.8%。 相似文献
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以炉灰脱色剂对还原蓝分散红染料的印染废水进行脱色处理研究，结果表明，在常温常压下，炉灰脱色剂在5min左右可使印染废水(pH=4～14)中的红色脱除率达98．673％，蓝色脱除率达91．598％，使废水由深蓝色变为无色，废水CODCr脱除率达56．210％．本脱色剂不仅价廉易得，处理设备简单，操作方便，以废治废，对印染废水无需进行pH值的调整，而且炉灰经焙烧再生后可多次重复利用，减少二次污染． 相似文献
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光合菌处理豆制品废水影响因素的研究 总被引：1，自引：0，他引：1
研究了在厌氧及微好氧条件下光合菌对豆制品废水的处理效果，探讨了接种量，废水浓度，废水pH值，处理温度对CODCr却除率的影响，结果表明，在pH值为7．5，30℃，微好氧条件下，光合菌对废水的CODCr去除率最高，且接种量与CODCr去除率成正比。 相似文献
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通过实验测定了制胶废水的可生化性，比较了三种不同的生物处理法对制胶废水的处理效果，结果表明制胶废水具有较高的可生化性，适于用先合细菌进行生物处理，用自固定化先全细菌处理制胶废水，在厌氧-好氧条件下废水的CODcr去除率比在单独厌氧或好氧条件下要高，在预处理和厌氧-好氧条件下，废水的CODcr总去除率迭到97．7％，出水符合国家规定的排放标准。 相似文献
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利用烟气除尘灰水处理高浓度印染废水的实验 总被引：2，自引：0，他引：2
利用锅炉燃煤烟气除尘灰水综合处理高浓度印染废水 ,在不同的处理工艺参数条件下 ,使两种废水直接混合进行试验。实验结果表明 ,烟气除尘灰水与高浓度印染废水体积比 1∶2 - 1∶3混合液 ,经沉淀分离后的上清液CODCr去除率 >16 % ,SS去除率 >6 0 % ,色度去除率 >5 0 %以上。为后续生化处理降低设备负荷、以废治废降低治理成本的新工艺设计 ,提供设计思路和可靠的实验数据。 相似文献
9.
应用PSB处理黄姜皂素废水的试验研究 总被引：1，自引：0，他引：1
皂素废水是一种酸度高、色度大、可生化性差的工业有机废水,利用光合细菌处理黄姜皂素生产废水并对影响因素进行试验研究的结果表明,在预处理后的废水中添加4．0‰酵母膏,pH7．5,接种量30％,光照条件2000Lx,温度30℃环境下处理6d,CODcr去除率最高。 相似文献
10.
采用厌氧-悬浮填料生物接触氧化-化学沉淀法处理淀粉厂废水,通过试验得到最佳工艺参数。经过处理,CODCr去除率为97．8％,BOD5去除率为99．5％,SS去除率为95．0％,各项主要指标均达到《污水综合排放标准）（GB8978—1996）二级标准。 相似文献
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
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. 相似文献
12.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
13.
Richard Denner 《海外英语》2007,(4):14-15
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. 相似文献
14.
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. 相似文献
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《海外英语》2007,(5):10-11
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? 相似文献
18.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献