餐饮业小型污水综合处理系统的技术研究

阐述了餐饮污水进行综合处理工艺的技术方案 ,即将餐饮污水中有营养价值的固体物质经过粉碎、固液分离和烘干消毒等工序后打包统一收集 ;含油污水经过油水分离后 ,废油回收 ,废水排入下水道。介绍了粉碎机、固液分离装置和油水分离器等设备的原理。该处理系统具有投资少、操作简单、自动化程度高等特点     

城市生活垃圾堆肥过程控制技术的现状和发展

介绍了堆肥处理过程的特点 ,叙述了国内外城市生活垃圾过程控制技术的发展现状 ,指出了该技术今后的主要发展方向及发展趋势 ,并讨论了垃圾堆肥过程控制面临的理论与实际问题。     

The Impact of Perceptual and Situational Factors on Environmental Communication: A Study of Citizen Engagement in China

This study applied a situational approach to understanding an environmental problem: PM2.5 (its resulted haze and smog air pollution) in China. Based on a national sample of 374 citizens living in China, it tested a situational model of problem solving and extended it by adding citizens’ environmental engagement behaviour as an immediate consequence of their communicative action. Results of a structural equation modelling analysis supported all the causal links in the conceptual model. Moreover, communicative action significantly mediated the relationship between referent criterion and environmental engagement. Problem recognition, constraint recognition, and involvement recognition did not influence environmental engagement directly, but exerted their significant indirect impact via two key mediators in the model: situational motivation in problem solving and communicative action in problem solving. Theoretical and practical implications of the present study were discussed.     

环境监测中如何提高水污染环境监测质量的分析

随着经济的不断发展,人类对于资源的消耗速度越来越快,使得环境正在逐渐的恶化。针对这种情况,保护环境成为了当前社会发展的重要手段。环境监测就是定期对环境中所含有的污染物进行分析,通过不断收集数据,来分析环境污染的变化,进而找出影响环境的原因。环境监测的内容包括空气、土壤等多个方面,水体监测是其中重要的工作内容,直接影响到对环境的正确评价。鉴于此,本文首先分析了水污染监测工作的重要性,然后提出了提高水污染监测质量的方法,希望能够为相关工作提供借鉴。     

基于物联网技术的跨区域气象环境污染监测系统

在气象污染方面,不同区域气象环境污染不同,各个地区的信息关联性微弱,导致现地区气象环境污染指数测量设备无法对其他区域污染信息准确检测,因此,本文通过提出以物联网技术为支持的跨区域气象环境污染监测系统,提出软硬件设计方式,系统以分层、模块、网络结构的物联网,通过以HMP45D传感器为基础的污染信息采集系统及以S3C2410处理器为基础的信息处理系统组成,各系统可单独运作,且系统设计MMA7260传感节点加速器加入到节点中,克服跨区域导致的湿度传感器误差,设计防治信号冲突软件,确保系统实用性。     

Pesticide wastewater treatment using the combination of the microbial electrolysis desalination and chemical-production cell and Fenton process

• MEDCC combined with Fenton process was developed to treat real pesticide wastewater. • Pesticide removal was attributable to desalination in the MEDCC. • High COD removal was attributable to organic distributions in different chambers. The combination of the microbial electrolysis desalination and chemical-production cell (MEDCC) and Fenton process for the pesticide wastewater treatment was investigate in this study. Real wastewater with several toxic pesticides, 1633 mg/L COD, and 200 in chromaticity was used for the investigation. Results showed that desalination in the desalination chamber of MEDCC reached 78%. Organics with low molecular weights in the desalination chamber could be removed from the desalination chamber, resulting in 28% and 23% of the total COD in the acid-production and cathode chambers, respectively. The desalination in the desalination chamber and organic transfer contributed to removal of pesticides (e.g., triadimefon), which could not be removed with other methods, and of the organics with low molecular weights. The COD in the effluent of the MEDCC combined the Fenton process was much lower than that in the perixo-coagulaiton process (<150 vs. 555 mg/L). The combined method consumed much less energy and acid for the pH adjustment than that the Fenton.     

Study on turbulence characteristics and sensitivity of quadrant analysis to threshold level in Lake Taihu

Environmental Science and Pollution Research - The identification of coherent structures is very important in investigating the sediment transport mechanism and controlling the eutrophication in...     

Comprehensive study on parameter sensitivity for flow and nutrient modeling in the Hydrological Simulation Program Fortran model

Numerous parameters are used to construct the HSPF (Hydrological Simulation Program Fortran) model, which results in significant difficulty in calibrating the model. Parameter sensitivity analysis is an efficient method to identify important model parameters. Through this method, a model’s calibration process can be simplified on the basis of understanding the model’s structure. This study investigated the sensitivity of the flow and nutrient parameters of HSPF using the DSA (differential sensitivity analysis) method in the Xitiaoxi watershed, China. The results showed that flow was mostly affected by parameters related to groundwater and evapotranspiration, including DEEPFR (fraction of groundwater inflow to deep recharge), LZETP (lower-zone evapotranspiration parameter), and AGWRC (base groundwater recession), and most of the sensitive parameters had negative and nonlinear effects on flow. Additionally, nutrient components were commonly affected by parameters from land processes, including MON-SQOLIM (monthly values limiting storage of water quality in overland flow), MON-ACCUM (monthly values of accumulation), MON-IFLW-CONC (monthly concentration of water quality in interflow), and MON-GRND-CONC (monthly concentration of water quality in active groundwater). Besides, parameters from river systems, KATM20 (unit oxidation rate of total ammonia at 20 °C) had a negative and almost linear effect on ammonia concentration and MALGR (maximal unit algal growth rate for phytoplankton) had a negative and nonlinear effect on ammonia and orthophosphate concentrations. After calibrating these sensitive parameters, our model performed well for simulating flow and nutrient outputs, with R ² and E_NS (Nash–Sutcliffe efficiency) both greater than 0.75 for flow and greater than 0.5 for nutrient components. This study is expected to serve as a valuable complement to the documentation of the HSPF model to help users identify key parameters and provide a reference for performing sensitivity analyses on other models.     

低温NH_3-SCR脱硝催化剂的研究现状与进展

高效催化剂的研制与开发是低温氨气选择性催化还原(NH_3-SCR)脱硝技术的核心。从活性组分(单一氧化物型、复合氧化物型)和载体(金属氧化物、碳基材料、分子筛)两方面详细介绍了低温NH_3-SCR催化剂,总结了其研究现状,并讨论了其抗水、抗硫性能及失活原因。指出在保证催化剂具有较高活性的同时提高其抗水、抗硫性能,是低温NH_3-SCR催化剂未来研究的重点。     

光辐照TiO2层柱粘土处理有机废水的研究

主要介绍了TiO2层柱粘土的制备方法,及用光辐照TiO2层柱粘土处理有机废水的机理、影响因素和提高TiO2层柱粘土光催化剂活性的途径;介绍了TiO2层柱粘土光催化剂的失活和再生.认为用光辐照TiO2层柱粘土处理有机废水是一种无污染而有效的方法,能有效解决目前废水处理过程中存在的许多问题.