污水回用深度处理中有机物对反渗透膜污染研究

应用牛血清蛋白（BSA）和海藻酸钠代表反渗透进水中的蛋白质和多糖,采用带有交互作用的正交试验分析污染因素的影响,使用环境扫描电镜和原子力显微镜对污染后的膜面进行监测．实验表明,海藻酸钠对膜污染的影响高于BSA的影响,BSA与海藻酸钠共同存在时会产生明显的交互作用,增大了有机物污染．溶液中Ca＾2＋会结合羧基官能团,以架桥作用连接有机物,能够显著影响有机物污染,Mg2＋对有机物污染的影响次之,离子强度会改变有机物的带电性,从而影响了有机物的污染．监测结果表明,有机物可在反渗透膜面形成厚密的凝胶层,引起严重的膜污染．     

郑州市南三环污水处理厂消防系统设计

郑州市南三环污水处理厂采用地下式组团布置形式,主要构(建)筑物布置于地下。该文结合地下污水处理厂建设特点,介绍该项目的消防系统设计。     

洗坛废水处理工程应用研究

该文介绍了某企业洗坛废水的处理工程。洗坛废水有机污染物(CODcr)浓度较低,可生化性较好,水质水量波动大,SS较高。某企业本着"节能减排、综合利用"的原则,采用了以生物接触氧化法为主,以预处理+深度处理为辅的组合工艺处理洗坛废水,系统运行稳定、效率高、运行成本低。工程运行结果表明,CODcr和SS处理后出水水质达到设计要求,可直接排放和回用于洗坛用水。同时,就工程中存在的问题进行了分析,并提出了解决办法。     

生物强化技术深度降解含高氯、高盐污水COD、NH_3-N的中试研究

国内某化学工业园污水厂主要处理氯碱厂高含氯、含盐污水和化肥厂氨氮污水。二沉池出水经过生物强化技术深度处理后,出水COD平均值为46.8 mg/L,NH_3-N为1.43 mg/L,出水可稳定控制在《污水综合排放标准》(GB 8978-1996)一级排放标准内。该技术具有良好的可控性,耐冲击负荷能力强,处理效果好,运行稳定,与常规生物治理技术相结合,可使得该技术在废水处理中显示出独特的作用。     

超大型半地下污水处理厂基坑设计与分析

以上海市某半地下式污水处理厂超大基坑为例,分析了此类基坑设计的特点与难点,详细介绍了基坑围护结构选型,基坑设计方案,包括围护桩(墙)选型,支撑选型,分区实施等措施,并分析了该工程基坑设计的关键技术,可供今后软土地区类似深大基坑设计借鉴和参考。     

雪峰山特长公路隧道污水处理设计

针对雪峰山特长隧道工程在施工和营运过程中产生的污水，通过分析研究，提出切实可行的污水处理方案，降低污水的SS值和PH值等，使污水达到排放标准后排放，从而减轻隧道污水对环境的影响。     

Highway Tunnel Blasting Vibrations and Cracking of Adjacent Residential Houses北大核心CSCD

A systematic analysis and discussion of the causes of house cracking are conducted by testing the blast vibration velocity of typical neighboring houses, analyzing the types of house cracking, monitoring the characteris-tics of house cracks and calculating the temperature stress at the roof and wall based on an assessment of highway tunnel blasting vibrations leading to cracking of neighboring houses. The results show that the main cause of house cracking adjacent to the tunnel is temperature stress, not blasting vibration. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

Evaluation of CO2 emissions from railway resurfacing maintenance activities

This paper is the world first to investigate the CO₂ impact of railway resurfacing in ballasted track bed maintenance. Railway resurfacing is an important routine maintenance activity that restores track geometry to ensure safety, reliability and utility of the asset. This study consisted of an extensive field data collection from resurfacing machineries (diesel-engine tamping machines, ballast regulators and ballast stabilisers) including travel distances, working distances, fuel consumption and construction methodologies. Fuel consumption was converted to a kg CO₂/m using the embodied energies of diesel. Analyses showed that tamping machines emitted the highest CO₂ emissions of the resurfacing machineries, followed by ballast regulators and ballast stabilisers respectively. Tamping machines processed 4.25 m of track per litre of diesel, ballast regulators processed 6.51 m of track per litre of diesel and ballast stabilisers processed 10.61 m of track per litre of diesel. The results were then compared to previous studies and a rigorous parametric study was carried out to consider long-term resurfacing CO₂ emissions on Australian railway track. The outcome of this study is unprecedented and it enables track engineers and construction managers to critically plan strategic rail maintenance and to develop environmental-friendly policies for track geometry and alignment restoration.     

基于船坞废水处理装置的优化设计

文章以船坞排放废水的处理装置为研究对象,针对传统废水处理装置能耗较大,以及废水中排放的废气可能会造成二次污染等问题.从船坞废水处理要求的设计指标出发,基于现有科学技术的处理方法和优化资源成本等要求,利用Microsoft Visio设计出一种结构性能好,技术要求低,操作简单且成本低的船坞废水处理装置,结果表明,这种装置...     

内循环厌氧反应器处理脂肪酸废水

研究了厌氧内循环反应器处理脂肪酸废水的启动和运行效果,化学需氧量（Chemical Oxygen De-mand,COD）与容积负荷的关系、容积负荷与出水挥发性脂肪酸（Volatile Fatty Acid,VFA）的关系.结果表明,反应器25 d即可完成启动,达到设计运行负荷25 kg COD/（m3.d）;反应器运行负荷为25 kg COD/（m3.d）时,处理效果最佳,出水pH值为6.80~7.23,VFA约为130 mg/L,COD去除率达到85%以上;pH值变化滞后,VFA的变化比pH值能更好表征反应器内部的运行状况.