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对采用吸附降解法处理啤酒废水的工艺进行了改造,解决了污泥的堵塞、污泥的膨胀、池体有效容积下降、运行成本较高等问题。运行结果表明,改造后的处理效果有明显提高,出水水质稳定,运行成本有了较大幅度的下降。 相似文献
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复合人工湿地在处理生活污水中的应用研究 总被引:7,自引:0,他引:7
通过对石家庄机械化步兵学院人工湿地污水处理系统、工艺特点和运行结果进行分析,得出人工湿地系统运行水质变化、植物特性和湿地结构的一些规律及存在的问题。 相似文献
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厌氧好氧工艺设计处理酒精生产废水 总被引:2,自引:0,他引:2
针对某酒精厂所排放废水的水质、水量特点,设计了好氧厌氧配以气浮和活性炭吸附相结合的处理工艺,通过实践证明,该工艺处理效率高,运行稳定。 相似文献
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泥龄应用中有关问题的探讨 总被引:20,自引:0,他引:20
活性污泥泥龄是反映微生物生长、基质去除及工艺运行控制特性的一个重要参数。文中探讨了泥龄理论应用中的泥龄概念、出水水质与泥龄、污泥沉陷性能及除磷与泥龄等方面问题,并首次提出了与污泥性能有关的最佳泥龄的概念。作者认为,出水水质在水质波动及有毒抑制物时,不仅与泥龄有关,而且与人流底物浓度有关;污泥沉降性能受泥龄的影响应存在一最佳值,使污泥有良好的沉陷性能;除磷率随泥龄的缩短而增加。 相似文献
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介绍了无锡市太湖新城污水处理厂的一期工程设计概况和所采用的改良型A^2/O脱氮除磷工艺,分析、探讨了污水处理厂的调试、培菌、试运行过程中出现的问题,并针对性地采用了一系列的解决措施。由监测数据表明,该工艺运行可靠,出水水质稳定,实现了污水处理厂的正常运行。 相似文献
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丹徒化纤厂棉浆粕生产废水治理工艺技术研究 总被引:2,自引:0,他引:2
针对棉浆粕生产废水水质特征及治理难度大的特点,提出了经济效益,而且工程投资省,运行管理方便,处理费用低,生物降解稳定可靠的棉浆粕生产废水治理工艺流程,短纤维回收-厌氧生物塘-兼氧生物塘。 相似文献
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大豆蛋白和屠宰废水处理工艺研究 总被引:5,自引:0,他引:5
介绍了两公司大豆蛋白废水的水质水量和性质特征,分析工程的工艺设计和调试运行状况。对大豆蛋白和屠宰废水的处理,采用混和处理的总体工艺,理论研究和运行实践表明,混和处理利于均衡生物处理营养,优化厌氧处理工艺型式及参数。污泥培养时,尽快从间歇运行变为连续运行,利于基质和污泥的混和接触,促进油脂和脂肪酸的降解,防止油和脂肪酸的积累及其抑制作用,防止油脂包覆污泥,造成污泥漂浮流失。 相似文献
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王海云 《环境污染治理技术与设备》2006,7(4):64-68
应用非线性动力学、分形理论、混沌学,研究了特大型船闸运行水污染系统,结合葛洲坝特大型船闸运行系统自组织特征和水污染事件,论述了船闸水污染非线性、分形特征,建立了动力方程、水质预测预报模型,指出常规理论方法研究中存在的问题,提出了水污染系统非线性研究是今后着重需要深入探讨研究的领域,具有重要的实用价值。 相似文献
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《国际环境与污染杂志》2011,10(2):304-314
This paper investigates some of the reflectivity characteristics that clouds (when modelled as solid bodies) must exhibit to be compatible with observations that the reflecting surface of a cloud (i) appears almost equally bright across its face, (ii) is brightest when the cloud is opposite to the Sun but decreases in brightness as the cloud moves to other positions and (iii) increases in brightness with increasing optical thickness of the cloud in the observer's line of sight. These observations, respectively, are shown to imply that the peak value of the bidirectional total reflectivity from a cloud surface (i) increases in inverse proportion to the cosine of the angle between the Sun and the normal to the cloud surface, as the incident angle increases, (ii) appears to be directed back in the direction of the incident radiation, and (iii) increases as optical thickness of the cloud in the observer's line of sight increases. The results could have application in many fields (e.g. modelling diffuse radiance distributions for cloudy skies). 相似文献
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Alfred Eisner Jacob Tadmor 《Journal of the Air & Waste Management Association (1995)》2013,63(4):400-401
A number of key projects in the Environmental Protection Agency (EPA) particulate R&;D program having applicability to industry are presented. For electrostatic precipitators (ESP) there is presented the result of work on large diameter discharge electrodes which provide a decrease in penetration of up to a factor of 4 when compared to conventional small diameter electrodes. Also discussed is the multistage ESP which provides a collection efficiency that would require a collecting plate area 4 or 5 times larger with conventional ESP technology. The E-SOX technology makes use of the multistage concept to free up space in the ESP for SO2 removals of up to 90%. Electrostatically augmented fabric filtration provides a reduction in pressure drop of about 5 0% as compared to conventional fabric filtration. Wind tunnel modeling of windbreaks for material storage piles indicates a potential for providing engineering design data that would allow significant emission reduction caused by wind erosion 相似文献
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Árpád Ambrus 《Journal of environmental science and health. Part. B》2013,48(3):435-442
Abstract A computer model was used to take random samples from primary sample populations obtained from field trials to simulate the uncertainty of sampling for residue analysis of plant commodities and soil. The results indicate about 40%, 30% and 20% relative uncertainty when random samples of size 5, 10 and 25 are taken respectively, from a single lot. Therefore the sample size should be the same for establishing and enforcing legal limits. 相似文献
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结合扬中生态环境的基本情况和存在的不足,进行了具体分析,对扬中未来生态建设的发展方向提出了建议及实施措施。 相似文献
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Janusz A. Pudykiewicz Anna S. Koziol 《Atmospheric environment (Oxford, England : 1994)》1998,32(24):5541
The most common technique used for numerical simulations of tracer mixing is that of the numerical solution of the advection–diffusion equation with the unresolved fluxes parameterized using the similarity theory. Despite correct predictions of the overall directions of transport, models based on a numerical solution of the advection–diffusion equation lack sufficient accuracy to correctly reproduce the coupling of mixing with small scale processes which are sensitive to the microstructure of the tracer distribution. The objective of this paper is to revisit the basic formalism employed in numerical models used to investigate atmospheric tracers. The main mathematical method proposed here is the theory of kinematics of mixing which could be applied effectively for simulations of atmospheric transport processes. At the beginning of the paper, we introduce simple mathematical transformations in order to demonstrate how complex topological structures are created by mixing processes. These idealistic flow systems are essential to explain transport properties of much more complex three-dimensional geophysical flows. An example of the application of the kinematics of mixing to the analysis of tracer transport on a planetary scale is presented in the following sections. The complex filamentary structures simulated in the numerical experiment are evaluated using some commonly applied statistical measures in order to compare the results with the data published in the literature. The results of the experiment are also analysed with the help of simple conceptual models of fluid filaments. The microstructure of the tracer distribution introduced in the paper is essential to increase our understanding of atmospheric transport and to develop more realistic parameterizations of small-scale mixing. The presented results could also be used to improve calculations of the coupling between microphysical processes and tracer mixing. 相似文献
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在实施ISO/IEC17025:1999标准《检测和校准实验室能力的通用要求》过程中,通过实验室质量管理体系内部审核的实践与系统分析,识别出内部审核实施阶段的关键环节,提出召开首次会议、收集审核证据、确定审核发现和召开末次会议的技术方法,对提高内部审核的质量和有效性、获得可靠的审核结论具有重要意义。 相似文献
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介绍了电解法生产次氯酸钠的原理 ,并在原有生产工艺的基础上进行了重新设计和对设备的重新选择、改造 ,得出了各个工艺参数的最佳值 ,生产出高品质的次氯酸钠 相似文献
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Philip W. West J. Jaime Chiang 《Journal of the Air & Waste Management Association (1995)》2013,63(7):671-673
A method is described for determining acidity by means of the spectrophotometric determination of the displacement of the equilibrium of açid-base indicators. The method is simple, sensitive and free of known interferences. There is no dependence on costly or sophisticated equipment and the results obtained are reliable and reproducible. 相似文献