一体式A/O-MBR处理校园生活污水中试研究

采用一体式A/O膜生物反应器(MBR)处理低浓度校园生活污水,着重考察了处理效果、膜污染规律和稳定运行的条件.结果表明,COD、氨氮平均去除率为92.54%、98.10%;系统临界膜通量保持在0.13-0.14 m<'3>/(m<'2>·d);反应器最优运行工况为第1阶段后期.     

德兴铜矿精尾厂废水纳滤法浓缩和分离

为了改善德兴铜矿精尾厂采用HDS工艺处理后的酸性废水和综合废水中COD和部分金属离子含量超标的水质情况,对酸性废水和综合废水在温度30℃、进料压力1.5 MPa、流量16~18 L/min条件下进行了纳滤处理.研究表明:随着纳滤浓缩倍数的增大,膜通量均呈现下降趋势,酸性废水浓缩4倍后的膜通量由70.06 L/(m2·h)减小到21.86 L/(m2·h),综合废水浓缩5倍后的膜通量由103.14 L/(m2·h)减小到39.99 L/(m2·h);纳滤处理后,酸性废水和综合废水中的SS、COD、S2-、Zn、Pb均达到现有企业排放标准;实验结束后,采用常规方法对纳滤膜进行清洗后,纳滤膜通量基本恢复到原来的膜通量.     

浸没式MBR在钢铁厂废水处理中的应用

膜生物反应器(MBR)是将生物处理与膜分离技术相结合的一种高效污水处理与回用新工艺。广州JFE钢板有限公司冷轧工程废水站生化处理单元选用了浸没式膜生物反应器(MBR)工艺,运行平稳,出水水质稳定,为后续废水深度处理回用奠定了坚实的基础。本文介绍浸没式膜生物反应器(MBR)的材质、结构、工作原理、设计参数、运行状态及膜装置的清洗、储存等。     

组件孔径对次毫米过滤的影响

[目的]通过自主研制一种次毫米过滤组件以实现高浓度污泥的折中分离.[方法]以获得平均浓度2.0～4.0 g/L污泥为目标,研究了5种不同孔径(0.10、0.30、0.47、0.80、1.00mm)的组件对次毫米过滤的平均通量及滤出液污泥浓度(MLSS)的影响.[结果]不同孔径的组件均可实现不同程度的污泥分离.组件孔径由0.10mm增大到1.00mm时,平均通量表现为先增大后减小的趋势,在孔径0.80 mm时达到最大值,为353.7L/(m<'2>·h).就试验目标而言,孔径0.47mm的组件效果最佳,运行40min后得到平均污泥浓度为3.1g/L,对应的平均通量为282.3L/(m<'2>·h),为膜运行通量的30～60倍.[结论]组件孔径对滤出液MISS及过滤通量的影响较大,0.47mm孔径的组件较符合污泥折中分离的需要,且在该组件孔径下滤出液MLsS随时间的变化较稳定.     

膜过滤技术在轧钢乳化液废水处理中的应用

采用陶瓷膜错流方式对冷轧钢带生产厂里的废乳化液进行处理,比较了对废乳化液的预处理和未预处理时膜能量及设备运行周期的差异,并采用表面活性剂和硝酸对污染后的陶瓷膜进行清洗,结果表明好的预处理能够有效的延长设备运行周期,使膜管通量衰减较慢,并且采用适宜的操作压力和温度能得到较高的通量.     

钢铁企业反渗透系统数据标准化及其应用

反渗透运行受水源的不同实际运行过程中表现的参数和污染类型也存在差异,如何对反渗透系统运行的综合性能进行评价,在实践中往往由于影响的因素多种多样,而且环境条件也发生变化,掌握运用其实并不容易。针对具体工程情况,对反渗透运行指标进行归一化处理和计算,对反渗透系统进行更加科学的管理和量化。并对反渗透系统运行中产水量和脱盐性能的变化进行了分析,列举了可能的各种原因;对影响膜组件的污染因素进行了说明,并提出膜组件污染现象和清洗方法。     

焦化废水处理系统的改造

介绍了莱钢焦化厂废水处理系统采用MBR膜工艺和臭氧工艺对原系统改造的原理、方法及实施过程。     

浅谈垃圾渗沥液处理的工程应用

结合某项目公司渗沥液处理工程,介绍厌氧+生化+膜处理工艺在渗沥液处理中的应用。该渗沥液处理站采用高效厌氧反应器UAIC+AO+MBR+NF+RO膜组合工艺,稳定运行后部分超滤产水与纳滤产水混合后达到《GB8978—1996污水综合排放标准》三级标准(COD300 mg/L)外排至污水处理厂。剩余纳滤产水经过反渗透后达到《GB/T19923—2005城市污水再生利用工业用水水质标准》后作为项目生产水补充回用。该工艺处理效果明显,运行能耗低,操作灵活且二次污染少,具有明显的技术经济优势。     

膜生物反应器处理洗车废水中操作压力及环境因素对膜过滤性能的影响

通过膜生物反应器(MBR)处理某车辆厂洗车废水的实验研究,结合理论计算,分析了操作压力及环境因素对膜过滤性能的影响.研究结果表明,在低压区,膜本身阻力占主导地位,它与操作条件无关;在中压区,浓差极化阻力占主导地位,它与其他操作条件关系密切;在高压区,凝胶层阻力占主导地位,操作压力增加对膜通量影响不大,在此阶段膜分离特性还与污泥浓度、膜面流速等操作条件有关.所以,采用膜反应器处理洗车废水,在MBR中存在一个临界压力,当操作压力高于临界压力时,膜通量随操作压力变化不大,而膜表面污染却明显加剧.因而设计膜生物反应器时,操作压力是一个重要的参数.此外,还研究了温度、pH值、水力停留时间等环境影响因素对膜过滤性能的影响.     

新型强化内源反硝化MBR工艺处理高氮、磷污水的研究

研究了采用新型强化内源反硝化MBR组合工艺处理高氮、磷污水。结果表明,新型强化内源反硝化MBR组合工艺的最佳运行条件为:试验装置总池容40L,污泥龄(SRT)30d,水力停留时间(HRT)为16h。最佳条件下,污水CODcr、氨氮、总磷的去除率分别为86.88%、99.22%和82.4%,出水水质满足《城镇污水处理厂污染物排放标准》一级A标准。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.