双氰胺-甲醛脱色剂在染料废水中的应用

以双氰胺、甲醛为主要原料合成了阳离子高效有机絮凝剂双氰胺一甲醛脱色剂,并与聚合氯化铝（PAC）以及聚丙烯酰胺（PAM）配合使用,处理模拟染料废水．通过考察脱色剂用量、絮凝剂的投加顺序、PAC用量以及pH值这几个方面对脱色率的影响,并通过正交试验寻求最佳试验条件．研究结果表明,影响脱色效果的主次因素依次为：脱色剂用量、pH值、聚合氯化铝用量．脱色剂用量为1．5—2．0mL／L,染料废水的pH值为7．5—9．5,PAC用量为50—90mg／L时,模拟染料废水的脱色率均可达92％以上,COD的去除率因染料种类的不同而存在一定的差异。不过也都在84％以上．     

Fenton试剂脱除模拟印染废水色度的研究

以亚甲蓝水溶液做模拟印染废水,采用Fenton试剂氧化法对其进行处理,以水样吸光度作为评价指标,利用单因素优化及正交实验法,对Fenton试剂用量、反应时间和入水pH进行了系统的研究．实验结果表明,Fenton试剂氧化脱除模拟印染废水色度的效果明显,水样脱色率达到99％以上;随着Fenton试剂用量的增加以及反应时间的延长,水样色度去除率提高,适宜的Fenton试剂用量及反应时间分别为5mL试剂／25mL水样、30min;入水pH存在适宜值4,在入水pH由4降低N3和由4升高到6的过程中,水样色度去除呈现降低的趋势;Fenton试剂氧化模拟印染废水中,3因素影响大小顺序为：反应时间〉Fenton试剂用量〉入水pH．     

微电解-酸水解-活性污泥法处理纺织印染废水

利用废铁屑微电解-活性污泥法工艺对纺织印染废水进行处理。该工艺处理印染废水效果好、投资少，色度、BOD5和CODcr除去率分别达到94％、90％和92％以上，处理后的水质达到GB4287—92纺织印染工业废水排放的一级标准。     

自制聚合硫酸铁处理高色度印染废水的实验研究

利用自制聚合硫酸铁处理高色度印染废水，研究了最佳实验条件。该方法工艺简单，药剂成本低，废水的COD去除率达70％以上，脱色率达98％以上，出水水质达到了国家印染废水排放二级标准。     

PSAFC处理印染废水的工艺条件选择

利用Al^3、Fe^3 的共聚特性和硅酸的盐效应，选择适当的工艺操作条件，对印染废水进行实验处理，实验中PSAFC作为凝聚剂，次氯酸钠（NaClO）作为脱色剂，实验表明：增大炭渣的用量和延长吸附时间都有利于印染废水的COD去除率的提高。实验利用正交试验法确定印染废水处理的最佳操作条件。     

高浓度印染废水预处理试验及应用研究--利用剩余污泥协同粉煤灰作絮凝剂的试验

利用印染废水好氧生物处理工艺的剩余污泥，作高浓度印染废水预处理的生物絮凝剂，协同粉煤灰预处理高浓度印染废水，使废水中排放监控指标-色度、悬浮物（SS）和化学需氧量（CODcr）显著降低，为降低后续生化处理负荷、有效降低高浓度印染废水处理的运行成本，探索废物资源化、以废治废产业化的工艺设计方向和途径，提供确切的实验依据。     

改良聚合氯化铝絮凝剂的制备及其对印染废水的絮凝性能

以铝矾土、废盐酸及丙烯酰胺为原料制备了一种高分子量无色聚合氯化铝（PAC）絮凝剂，试验了其对印染废水的絮凝性能并与其它四种絮凝剂进行了比较。其中包括PAC投加量对絮凝速度、沉淀分离效果、废水pH值、PAC用量对絮凝处理效果的影响。该产品在常熟市承禹化工厂投入生产，经常熟市自来水厂和常熟市双鹰集团公司等企业应用，结果表明该絮凝剂的絮凝性能优于其它几种絮凝剂，完全适用于河水、造纸工业用水及印染废水的处理。     

硫酸铝与聚丙烯酰胺混凝处理印染废水的研究

硫酸铝和聚丙烯酰受（PAM）混合絮凝处理印染废水,具有处理成本低,絮体颗粒大,强度高,沉降速度快等优点,当硫酸铝用量（折合成Al2O3)为23.6ppm,PAM用量1．25－2.5ppm时,印染废水的CODcr由639mg/L降低到48.4mg/L,去除率达92．4％,色度由220倍降至16倍,脱色率达92．7％,总去污>94%,处理水可达标排放。     

SBR法处理模拟印染废水的实验研究

采用实验室规模的序批式活性污泥曝气反应器（SBR）工艺处理模拟的印染废水．通过实验分析了不同曝气时间、进水浓度、静沉时间与SBR处理效果之间的关系,确定了SBR法处理中低浓度的印染废水的最佳运行参数．实验结果表明,在SBR的曝气时间为8h,沉淀时间为1h的条件下,且废水进水pH值为7．5～8．6,COD—cr为8901080mg／L、氨氮为13～20mg／L、色度为350倍左右时,该工艺对CODcr、氨氮、色度等均有很好的去除效果,经处理的印染废水COD、氨氮、色度去除率分别为50％～70％、40％～67％、20％．该法具有投资少、运行费用低、操作简单的特点．     

超声波-芬顿协试剂同处理亚甲基蓝染料废水的研究

用超声波和芬顿试剂联合处理模拟印染废水亚甲基蓝溶液,分析了反应时间、芬顿试剂配比用量、溶液pH值以及超声波处理时间等因素对处理效果的影响,最终确定了最佳实验条件：1mmol／L的亚甲基蓝溶液50mL,加入20mmol／L的FeS04溶液2．5mL,加入6％0的H202溶液22．5mL,调节pH一2．80,超声波处理1h,亚甲基蓝溶液的脱色率可达96％以上,COD的去除率达85％以上。实验结果表明,用超声波和芬顿试剂协同处理亚甲蓝溶液的效果优于芬顿试剂单独处理的效果。     

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?     

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.     

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.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.