Determination of assimilable organic carbon (aoc) in ozonated water with acinetobacter calcoaceticus

The effect of ozone application in drinking water on the production of assimilable organic carbon (AOC) was evaluated. The typical procedure to determine AOC is suggested by van der Kooij, which is the method of bacterial growth measurement by colony‐forming units using the strain P17 and/or NOX. The bacterial indicator species used for this study is Acinetobacter calcoaceticus which was isolated and identified while ozonating Nakdong river water. This strain could never be isolated from the raw water, but this strain was the predominant isolate in the ozonated water. Within a short incubation time, this organism was found to replicate well on acetate and oxalate as the sole carbon sources. The yield coefficients of this organism for acetate and oxalate are the same order of magnitude as the value of P17 and NOX. With full‐scale experiments, A. calcoaceticus concentration was found to increase after ozonation, but did not decrease upon chlorination. In laboratory‐scale experiments with Yongsan river water, aldehyes were found to be produced in proportion to the ozone dose. The raw water contains low concentrations of aldehydes, but has a high AOC concentration. A correlation between aldehyde production and AOC production was observed in the tested water with ozonation.     

生物活性炭技术的应用及发展趋势

生物活性炭技术结合并优化了活性炭吸附和生物降解两种作用,在水处理和废气治理等方面显示了突出的效果。文章总结了近年来国内外生物活性炭技术的研究和应用成果,并指出了以后的研究方向。     

Drink-driving in community sports clubs: Adopting the Good Sports alcohol management program

Throughout the developed world, community sports clubs are a high-risk setting for alcohol-impaired driving. The Good Sports program accredits community sports clubs to encourage implementation of alcohol-focussed harm-reduction and safe-transport strategies. This study tested for associations between participation in the Good Sports program and reduced rates of drink-driving amongst club members. Multilevel modelling indicated that for each season a club was in the program there was an 8% reduction in the odds of drink-driving. These findings may arise due to clubs with lower rates of alcohol use maintaining longer involvement in the program. However, the findings are also compatible with the intention of the Good Sports program to reduce the risk that club members will drive whilst alcohol impaired.     

Self-consistent analysis of the band structure of doped lattice-matched GaNAsBi-based QWs operating at 1.55 μm

Band structures of n–i doped lattice-matched GaNAsBi/GaAs quantum wells are studied theoretically using a self-consistent calculation (based on the envelop function formalism) combined with the 16-band anti-crossing model. Operating at 1.55 μm, these QWs can represent active zones of temperature-insensitive optoelectronic device applications intended for optical fiber communications. We have calculated physical parameters of the structures such as the confining potential profiles, the Fermi level, the subband energies and their corresponding wavefunctions as well as the oscillator strength of inter-band transitions, the subband occupations, and the confined electrons density distributions. Finally, the absorption coefficient spectra of GaNAsBi-based QWs are also computed.     

超滤膜组合工艺在青浦第三水厂设计中的应用

提出采用高效沉淀、臭氧生物活性炭与超滤膜组合工艺处理黄浦江上游微污染原水,并介绍了该工艺在上海市青浦第三水厂中的具体应用与设计参数。实际运行表明,该工艺可确保出厂水浊度<0.1 NTU、耗氧量<1.5 mg/L、氨氮<0.2 mg/L,处理效果稳定,供水安全性高。     

天津滨海国际机场二期扩建工程T2航站楼地下室防水工程设计与施工

介绍了天津滨海国际机场T2航站楼扩建项目地下室防水工程采用BAC双面自粘防水卷材的施工技术,重点介绍了地下室底板、侧墙、顶板防水施工中采用该类自粘卷材的施工方法、注意事项以及相关节点部位的处理方法。     

嵌入式无线收发智能家居网关设计与实现

目的将基于蓝牙技术的个人区域网与基于BACnet的小区内部局域网相连接，使家庭中的各种设备通过安全的无线链路连接到CPU上，进行个人控制与小区内部物业管理系统的信息交换．方法建构系统组网模型，采用精简的TCP／IP协议包，在BACnet协议栈与蓝牙协议栈之间建立一条无缝链路．研究其算法实现步骤、协议软件连接以及系统硬件构成．结果利用无线网关和外部网络连接构成的智能化家居网络，可提供集中和异地的数据通信，使信息在家庭内部和外部之间充分流通和共享，避免了传统网络在家庭中错综复杂的布线方式，解决了蓝牙技术不能远距离传输的问题．结论基于蓝牙技术的个人区域网使智能家居网络系统具有更加广泛的灵活性和可扩展性，适用于住宅小区网络系统应用．     

高锰酸盐预氧化对生物活性炭硝化性能的影响

通过测定生物活性炭上硝化菌的数量与活性,考察高锰酸盐预氧化对后续生物活性炭硝化性能的影响.结果表明,高锰酸盐预氧化后的生物活性炭与单独生物活性炭上亚硝酸菌和硝酸菌的分布具有相同规律;但高锰酸盐预氧化后生物活性炭工艺中亚硝酸菌和硝酸菌数量、亚硝化速度及硝化速度都要高于单独的生物活性炭,这是高锰酸盐促进后续生物活性炭工艺去除氨氮和亚硝酸盐氮的主要原因.     

BAC设备在IMS网络中的应用

为满足全业务市场竞争的需求,推进核心网络融合,提供多媒体业务及融合应用,运营商在2011年进行IMS网络部署。BAC作为IMS网络核心网安全防护的关键门户,负责隔离信任域(核心网)与非信任域(用户终端),除汇聚大量的各类IMS用户,同时提供核心层保护、QoS控制等功能,网络地位非常重要。本文对IMS网络中的BAC设备组网、容量、部署层面、业务规划规划设计进行探讨,力求为电信运营商的IMS网络建设提供有益的参考。