光周期对微绿球藻生长和物质生产的影响

为研究光周期对微绿球藻（Nannochloris oculata）生长及物质生产的影响,该文设置了4种长时光周期（光∶暗(h∶h)=24∶0、16∶8、12∶12或8∶16）,5种频率光周期（按照光∶暗=16∶8,24 h内分别设置1、4、9、16或25次光暗交替）。结果发现,长时光周期对微绿球藻的生物量干重无显著性影响,而频率光周期对生物量干重影响显著。2种光周期对于微绿球藻的叶绿素a含量有极显著影响,生长速度最快的处理组叶绿素a含量最低。2类光周期对微绿球藻脂质生产均有显著影响,24∶0及16∶8处理组获得较高的脂肪产量,24 h内光暗交替9次处理比交替1次的脂肪产量提高了55.65%。微绿球藻的蛋白质生产受光周期影响不大,但多糖生产受光周期影响显著。微绿球藻的脂肪酸中含量最丰富的是C18∶3(n-3)、C16∶0和C18∶2(n-9),频率光周期对其脂肪酸组成和生物柴油性能影响不显著。     

低低温电除尘器二次扬尘分析及解决措施

低低温电除尘技术二次扬尘增加,必须采取相应措施才能发挥其高除尘效率。分析了低低温电除尘器二次扬尘的特点和国外采取的措施及研究现状,包括离线振打、旋转电极技术两种解决方法。提出了新型解决低低温电除尘器二次扬尘的方法,即优化振打系统,并将该技术在长兴电厂低低温电除尘器中的应用作了重点阐述,成功解决了该项目的二次扬尘问题。     

Changes in the quality of river water before, during and after a major flood event associated with a La Niña cycle and treatment for drinking purposes

The treatment of organics present in the lower reaches of a major river system（the Murray–Darling Basin, Australia） before（March–July 2010）, during（December 2010–May 2011） and after（April–December 2012） a major flood period was investigated. The flood period（over 6 months）occurred during an intense La Nia cycle, leading to rapid and high increases in river flows and organic loads in the river water. Dissolved organic carbon（DOC） increased（2–3 times） to high concentrations（up to 16 mg/L） and was found to correlate with river flow rates. The treatability of organics was studied using conventional jar tests with alum and an enhanced coagulation model（mEnCo）. Predicted mean alum dose rates（per mg DOC） were higher before（9.1 mg alum/mg DOC） and after（8.5 mg alum/mg DOC） than during the flood event（8.0 mg alum/mg DOC）,indicating differences in the character of the organics in raw waters. To assess the character of natural organic matter present in raw and treated waters, high performance size exclusion chromatography with UV and fluorescence detectors were used. During the flood period, high molecular weight UV absorbing compounds（〉2 kDa） were mostly detected in waters collected,but were not evident in waters collected before and afterwards. The relative abundances of humic-like and protein-like compounds during and following the flood period were also investigated and found to be of a higher molecular weight during the flood period. The treatability of the organics was found to vary over the three climate conditions investigated.     

基于全寿命周期的光伏发电项目环境影响分析

光伏发电项目是一种利用太阳能采用特殊材料和设备发电的系统。随着国家对于环境的重视,光伏发电系统已经成为国家鼓励发展的一种绿色环保的电能提供设施。但是任何工程项目总是会对于环境有一定影响,本文基于全寿命周期管理对光伏发电项目的环境影响进行分析,得出目前国内光伏发电项目需要多加关注建设阶段、运营阶段对环境影响的结论。     

ESC省级环境空气质量自动监测系统在“空气质量周报”编报中的应用

从ESC省级环境空气质量自动监测网络系统的各测子站采集原始数据，经FoxPro语言编写的程序设计，计算出“全省环境空气质量周报”报需的数据。     

电厂锅炉补给水系统中反渗透装置清洗的探讨

通过对锅炉补给水处理系统中反渗透装置的多次化学清洗,结合水质条件和运行实际情况,提出反渗透膜清洗药品选型和反渗透膜清洗措施,并对反渗透装置运行及清洗存在的问题进行了总结,为同类清洗反渗透装置在运行效果、清洗效果以及延长膜运行寿命方面提供参考。     

重要启事

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生态设计

“生态设计”这一术语更常用于欧洲．而在美国的文献中,它常被“为环境设计”所替代。我们在这里使用的定义是参考Fiksel（1996：3）中定义的“关于整个产品和产品寿命周期环境．健康和安全目标设计绩效的系统考虑。正如LCA一样。现代生态设计源于1960年到1970．然后提出例如再循环设计或者再利用设计。它的出现也涉及对消费者的讨论（和他们的消费决策）以及1960年末．伴随着对小决策的累积效果的争论（也涉及“小决策”,在2．1小节中被介绍）。     

周期循环静止沉淀工艺实验研究与实践

为了提高给水处理中常规沉淀池的沉淀效率,采用多个沉淀池代替常规的单一沉淀池进行沉降实验,多池依次进水、依次静止沉淀,然后出水,周期循环,并在实验的基础上提出了“周期循环静止沉淀”这种给水处理新工艺。实验结果和实践表明,周期循环静止沉淀工艺与常规连续进、出水的单一沉淀池工艺相比,其沉淀效率明显提高,其出水水质显著改善。     

Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment plants

The prediction of the influent load is of great importance for the improvement of the control system to a large wastewater treatment plant. A systematic data analysis method is presented in this paper in order to estimate and predict the periodicity of the influent flow rate and ammonia （NH3） concentrations： 1） data filtering using wavelet decomposition and reconstruction; 2） typical cycle identification using power spectrum density analysis; 3） fitting and prediction model establishment based on an autoregressive model. To give meaningful information for feedforward control systems, predictions in different time scales are tested to compare the corresponding predicting accuracy. Considering the influence of the rainfalls, a linear fitting model is derived to estimate the relationship between flow rate trend and rain events. Measurements used to support coefficient fitting and model testing are acquired from two municipal wastewater treatment plants in China. The results show that 1） for both of the two plants, the periodicity affects the flow rate and NH3 concentrations in different cycles （especially cycles longer than 1 day）; 2） when the flow rate and NH3 concentrations present an obvious periodicity, the decreasing of prediction accuracy is not distinct with increasing of the prediction time scales; 3） the periodicity influence is larger than rainfalls; 4） the rainfalls will make the periodicity of flow rate less obvious in intensive rainy periods.