A／OO生物脱氮装置的生产实践

介绍了A／OO生物脱氮装置在马钢煤焦化公司的运行情况，探讨了A／OO生物脱氮工艺中存在的问题和解决措施。     

焦化污水的生物脱氮处理

通过对国内外生物脱氮基本流程的对比，证明了A／O生物脱氮工艺具有效率高，工艺流程简单，投资少等特点，对焦化污水处理行之有效。     

交替A/O工艺处理养猪废水脱氮研究

采用交替A/O工艺处理养猪废水.进行硝化菌与反硝化菌的培养、驯化;交替阶段厌氧和好氧段各自运行的最佳时间的确定;交替A/O工艺对NH3-N、TN、NO3-N的去除情况以及交替A/O工艺对养猪废液脱氮机理的研究.结果表明,A段运行2.5 h,O段运行时间为2 h,交替13.5 h即3个交替过程后,NH3-N的去除率为60.44%,总氮去除率为56.37%,NO3-N去除率22.35%.交替A/O工艺脱氮的去除率突破了传统A/O工艺脱氮的去除率的理论限制,对脱氮机理理论研究有重大的贡献.     

生物脱氮工艺在焦化废水处理中的应用

叙述了焦化废水生物脱氮的原理.着重介绍了先进有效的A/O、A-A/O和缺氧一好氧一接触氧化的工艺流程及运行效果.指出了影响焦化废水生物脱氮效果的因素.     

焦化废水生物脱氮工艺浅析

介绍了焦化厂废水生物脱氮技术的发展现状，比较了各种工艺及其组合工艺的处理效果，提出了焦化废水生物脱氮工艺的问题及发展方向。     

污水处理的新方法中生物脱氮除磷机理及新工艺处理

近些年来,伴随着生物技术水平的高速提升,生物脱氮除磷技术在污水处理中得到了十分广泛的应用。根据相关数据调查显示,生物脱氮除磷技术能够有效缓解水体的富营养化情况,因此,该项工艺的应用已经引起了相关技术人员的重视,本文也主要针对生物脱氮除磷的相关机理与工艺处理两大方面内容进行深入分析,希望能为我国污水处理效率与质量的提升具有一定帮助。     

生物除磷脱氮工艺的探讨

在传统的AB法污水处理工艺以及反硝化除磷、脱氮原理的基础上，提出了一个更为有效的以转化有机碳源为甲烷，回用处理的生物除磷、脱氮推荐工艺。     

90t LF/VD(EMS)真空脱氮工艺研究

介绍了在马钢 90tLF/VD(EMS)上进行真空脱氮工艺试验研究的情况 ,并据此进行了有关真空脱氮的动力学分析 ,提出了真空脱氮的工艺模型。该模型与试验结果吻合较好。本文还讨论了吹氩搅拌和电磁搅拌对脱氮的影响作用。     

焦化工业废水生物脱氮处理技术

介绍了焦化工业废水的生物脱氮机理、工艺及调试过程，总结了该工艺的关键技术控制措施及生产注意事项。     

黑龙江建龙焦化废水处理系统改造实践

通过对黑龙江建龙钢铁焦化废水处理系统进行生物脱氮工艺改造,使出水水质各项指标均达到国家《废水综合排放标准》(GB8978-1996)中规定的一级标准.同时,对焦化废水处理工艺流程、设备选择及工艺参数等方面进行了调整、改进,以期对焦化废水处理生物脱氮工艺设计和运行提供借鉴.     

Nitrogen Removal Using Combined Ultracompact Biofilm Reactor-Packed Bed System

A predenitrification system consisting of an ultracompact biofilm reactor (UCBR) and a packed bed column was used for removing nitrogen from synthetically simulated wastewater. The UCBR column was maintained under aerobic conditions to favor nitrification process, while the packed bed column was operated under an anoxic environment for denitrification process. A peristaltic pump was used to recycle fluid between the anoxic-packed bed and aerobic-UCBR columns to facilitate nitrogen removal. Five recycle ratios (R) were investigated, namely, 3, 4, 5, 6, and 10. The highest average total nitrogen (TN) removal rate was achieved at R = 4. The NH4+–N, TN, and chemical oxygen demand (COD) removal rates at this R were 0.56±0.05?kg NH4+–N/m3/day, 0.39±0.09?kg TN/m3/day, and 1.83±0.18?kg COD/m3/day, respectively. It was noted that poor nitrification in the UCBR was accompanied by a corresponding reduction in overall TN removal efficiency. This observation suggested that nitrification process was the limiting step for TN removal in this setup. Thus, the performance of this predenitrification system could be enhanced by optimizing the performance of the nitrification process.     

焦化废水处理工艺的改造和优化

主要介绍了,马钢煤焦化公司现行污水处理A/OO活性污泥法的运行状况、存在问题及解决方案,以及运行效果和发展前景。     

电催化氧化法去除黄金冶炼废水中氰化物和氨氮试验研究

对黄金冶炼废水进行了电催化氧化处理研究,考察了氯离子质量浓度、极板间距、电流密度等因素对氰化物和氨氮去除效果的影响。最佳工艺参数为:废水初始pH值9.28、氯离子初始质量浓度25 g/L、极板间距20 mm、电流密度16.3 mA/cm2、废水循环流速64 mL/min。在最佳工艺条件下,电解150 min,氰化物质量浓度从28.84 mg/L降至0.20 mg/L,氨氮质量浓度从700 mg/L降至7 mg/L,去除率分别为99.3%、99.0%,处理后废水中的总氰、氨氮均可达到《GB 8978—1996污水综合排放标准》一级标准。     

RH精炼过程增氮行为探讨

为了在RH精炼过程对氮的质量分数进行稳定控制,通过热力学计算分析钢水成分、RH真空度等对理论平衡氮质量分数的影响,分析RH提升气体从吹入上升管到进入真空室过程中压力的变化对平衡氮质量分数的影响。从动力学角度分析气相中的传质阻力、界面化学反应阻力、液相中的传质阻力共同作用于钢液的增氮、脱氮过程。提出RH处理过程的3种增氮途径及其对应的平衡氮质量分数。当钢种要求氮质量分数大于真空度下的理论平衡氮质量分数时,RH处理过程存在增氮、脱氮共存的状态。在氮质量分数变化过程中,当脱氮速度等于增氮速度时,钢液中氮质量分数达到动态平衡,不再发生变化。在真空度为5 kPa的条件下,RH钢液中氮质量分数达到动态平衡,不再发生变化时对应的氮质量分数为0.010 0%。     

Painless osteoid osteoma of the rib in an adult. A case report and a review of the literature

BACKGROUND: An asymptomatic rib lesion was discovered by means of a bone scan obtained during the clinical evaluation of an adult man with biopsy proven prostate adenocarcinoma. Clinically and radiologically considered to be a metastatic focus, on resection it proved to be an osteoid osteoma (OO). METHODS: A review of the English medical literature on OO was conducted with emphasis on the occurrence in older patients, costal location, and the absence of pain. RESULTS: OO in patients older than age 50 years is rare (1% - 2% of cases). Only 18 cases of painless OO were found. Of these, 8 (44%) occurred in the phalanges, and 3 (17%) in the cranial-facial bones, both uncommon sites for OO; only 7 (39%) arose in the long bones, the most common site for conventional OO. A disproportionate number of these patients (44%) were younger than age five years, a rarity for OO. Fourteen reported examples of costal OO were found, all of which were associated with pain. The possible mechanisms involved in the production of pain, including analysis of the effect of its site of origin and the presence of nerve fibers, is reviewed. CONCLUSIONS: Costal OO is distinguished from osteoblastoma and from what has been described as painless fibro-osseous lesion of the rib. The infrequency of metastases as a cause of solitary rib lesion is emphasized.     

冶炼工艺对管线钢洁净度的影响

研究了LD-LF-CC和LD-ANS-OB-CC两条工艺路线对管线钢洁净度的影响.通过合理的工业试验和金相、化学等分析手段,对冶炼过程钢水中氧、氮含量和夹杂物进行了定量分析.结果表明:钢水经过LF炉和ANS-OB两种精炼工艺处理后钢水洁净度是一致的,采用LD-AND-OB-CC工艺生产某些钢种可降低成本.提出了精炼过程中吹氩工艺是去除夹杂物的主要因素.精炼处理时间40 min,钢中氧、氮和夹杂物基本达到最好水平,继续延长精炼时间钢水中夹杂物没有变化.     

低负荷厌氧生物处理焦化废水试验研究

采用低负荷厌氧生物反应器处理焦化废水的实验结果表明,低负荷厌氧生物反应器可有效地降低废水中的TOC(总有机碳)和TN(总氮),处理3h后,TOC和TN分别降低了77.9mg/L和31.1mg/L。厌氧处理改善了焦化废水的生化条件,降低了后续处理生物负荷,为焦化外排水的COD(化学需氧量)满足一级排放标准(GB 13456-1992)奠定了基础。     

煤气洗涤废水中氨氮处理试验研究

研究了MAP法和电化学法对煤气洗涤废水中氨氮脱除效果,实验结果表明：对于MAP法,在pH=9．5～10,n（NH4＋）：n（PO4^3-）：n（Mg2＋）=1：1．5：1．5条件下;对于电化学法,选择投氯比为1：5,总输入电流强度在1．7～2．0A时,两种工艺均可将其氨氮含量脱除至15mg／L以下,达到国家污水综合排放标准（GB8978—1996）一级。     

换包后中间包内夹杂物运动行为

采用数值模拟与工业试验相结合的研究方法,分析中间包在换包后包内夹杂物颗粒在非等温条件下的运动行为。研究结果表明,换包后,钢中不同尺寸的夹杂物有分离趋势,且小于50μm夹杂物的去除条件逐渐变差。在浇注中后期,小于50μm夹杂物倾向于跟随流体沿中间包底部流出中间包,夹杂物的去除效果进一步变差。工业试验结果表明,通过在中间包底部吹入氩气的方式,改善了换包后夹杂物去除的不利影响。中间包底吹氩气前,大于50μm夹杂物的数量密度为0.008 8个/mm~2;中间包底吹氩气后,铸坯中大于50μm夹杂物的数量密度为0.002 5个/mm~2。     

Rational self-interest and other orientation in organizational behavior: A critical appraisal and extension of Meglino and Korsgaard (2004).

B. M. Meglino and M. A. Korsgaard (2004; see record 2004-21169-004). argued that rational self-interest varies across individuals and negatively relates to other orientation (OO). OO moderates effects of job characteristics on attitudes, motivation, and helping. Viewing organizations as social dilemmas in which employees face a mixture of competitive and cooperative incentives, the author argues in this article that strength of self-interest links to self-concern (SC), which should be distinguished from OO. SC and OO are orthogonal and unipolar. Implications are that some propositions by Meglino and Korsgaard need to be rewritten in terms of SC or OO, and that SC is predicted to moderate effects of self-related variables (e.g., job characteristics), whereas OO might moderate effects of social variables (e.g., team climate) on satisfaction, motivation, and helping. This also implies that when both SC and OO are strong (weak), individual- and group-level constructs are both (in)valid predictors of satisfaction, motivation, and helping. (PsycINFO Database Record (c) 2010 APA, all rights reserved)