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1.
利用微生物快速挂膜技术治理糖果废水的研究   总被引:2,自引:0,他引:2  
利用微生物快速挂膜技术对糖果废水治理进行研究,结果表明:该技术对废水中的CODCr及BOD5的去除有显著的效果。当废水的pH值为6 ̄8、水温为25 ̄35℃、CODCr及BOD5分别在3000 ̄9000mg/L和1000 ̄3000mg/L时,CODCr及BOD5的去除率分别大于92%和99%,从而为糖果废水治理达标排放奠定了基础。  相似文献   

2.
本文利用AB法废水生物处理技术进行治理高浓度石油化工废水的试验研究,通过AB法和普通活性污泥法处理高浓度石油化工废水对比性试验,系统地考察了两种方法的进水负荷、耐冲击负荷、活性污泥性状和处理效率等指标。研究结果表明:AB法在进水COD为1600mg/L,BOD5为800mg/L,苯酚浓度为600mg/L,总容积负荷为12kgCOD/m^3day的条件下,COD去除率为96.5%,BOD5去除率达9  相似文献   

3.
光合细菌处理高浓度制革废水的研究   总被引:10,自引:0,他引:10  
该文提出采用三级内装软性纤维填料的生物接触氧化槽连续处理工艺,利用光合细菌对制革废水中的高浓度有机废水进行处理。通过试验,确定的工艺条件为进水COD浓度8000kg/L左左,接种活性污泥进行24h可溶化处理,白天自然为光照、夜间人工光照或黑暗,间歇曝气造成瘘性好氧条件(DO0.5-20mg/L),PSB处理时间为72h,连续处理小试结果COD和S^2-的平均去除率分别为90.4%和98.0%,BO  相似文献   

4.
本研究采用酸析木质素、电化学法及生物处理相结合的草浆蒸煮废液处理新工艺。废液pH3.0时,大部分木质素酸析沉降,CODCr去除率52.9%。酸析木质素后的废液采用铁作牺牲阳极,石墨作阴极的电化学处理法,废液中S2-的去除率达82.6%,Fe3+浓度达31.6mgL-1。后续处理采用活性污泥法,利用废液中Fe3+对生物反应过程的特殊刺激作用和絮凝作用,强化生物处理,出水水质:CODcr291mg·L-1,BOD294mg·L-1,SS23mg·L-1。  相似文献   

5.
采用热絮凝、汽提等方法对味精废水进行预处理,COD、NH2-N和SO2-4分别去除50%、80%和60%以上.考察了UASB反应器与CSTR光合反应器厌氧-微氧串联系统治理味精废水效果,在进料COD浓度为25.6g/L条件下,其COD处理能力达3.9kg/dm3,COD去除率达97%.  相似文献   

6.
采用热絮凝、汽提等方法对味精废水进行预处理,COD、NH2-N和SO2-4分别去除50%、80%和60%以上.考察了UASB反应器与CSTR光合反应器厌氧-微氧串联系统治理味精废水效果,在进料COD浓度为25.6g/L条件下,其COD处理能力达3.9kg/dm3,COD去除率达97%.  相似文献   

7.
研究了以抗坏血酸为还原剂,用光度法测定碳化硅超细粉中微量SiO2的方法,结果表明,最大吸收波长为800nm,表观摩尔吸光系数为2.50*10^4L/(mol.cm),线性范围为0.05-0.07mg/L,平均回收率为99.32%,RSD为1.67%,该法适用于碳化硅超细粉中微量SiO2的测定。  相似文献   

8.
光合细菌降解3种有机废水的试验研究   总被引:10,自引:0,他引:10  
选用从有机废水中分离出的7株光合细菌菌株,并用于处理豆制品、淀粉、肉制品废水。研究试验表明:①经对COD_(Cr)=52800mg/L的豆制品废水进行144h的处理,去除率达92.7%;②经对COD_(Cr)=3864mg/L的淀粉废水进行72h处理,去除率达99.5%;③经对COD_(Cr)=50l0mg/L的肉制品废水进行72h处理,去除率达93%。另通过光合细菌菌株对不同浓度不同性质的废水处理比较、单菌株与混合菌株的比较;时间、pH值、接种量等因素对处理的影响比较,均得到了今人满意的处理试验结果。  相似文献   

9.
CaCl2溶液能提高小麦苗的SOD活性,尤其以20mg/L、50mg/L溶液最为有效。最佳处理次数与所用浓度有关,较低浓度溶液(20mg/L)处理5次,较高浓度溶液(50mg/L、100mg/L)处理1次。浇根和喷叶一样也能提高SOD活性。CaCl2溶液喷洒麦苗使SOD同工酶出现新的谱带。  相似文献   

10.
用RP-HPLC法测定葛根芩连胶囊中盐酸小檗碱的含量。采用Shimadzu VP-ODS柱,乙腈-0.06mol/L KH2PO4-SDS(250:300:3.3g)为流动相,检测波长347nm。方法准确可靠,快捷方便,回收率为99.60%,RSD为1.06%。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

19.
Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of  相似文献   

20.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

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