以最经济输水为原则 调整高压输水泵及工艺

简这了炼油厂更新高压输水泵，调整输水工艺、降低输水成本的方法。     

Effects of environmental factors on the production and release of matrix-bound phosphine from lake sediments

Effects of pH, temperature, and oxygen on the production and release of phosphine in eutrophic lake sediments were investigated under laboratory tests. Results indicated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 or 12. Phosphine levels could reach maximum under initial pH 10. The contents of phosphine increased with the addition of alkali under pH 4–12. The rates of phosphine production and release from lake sediments varied with temperature. 20°C was the most favorable temperature for the production of matrix-bound phosphine. Oxygen showed little effect on matrix-bound phosphine. Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of natural generation and depletion processes. Translated from Acta Scientise Circumstantiae, 2005, 25(5): 681–685 [译自: 环境科学学报]     

Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration methanol Wastewater

In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments were employed to evaluate the performance of anaerobic digestion for the treatment of high concentration methanol wastewater. The acid resistance of granular sludge and methanogenic bacteria and their metabolizing activity were investigated. The results show that the pH of the first UASB changed from 4.9 to 5.8 and 5.5 to 6.2 for the second reactor. Apparently, these were not the advisable pH levels that common methanogenic bacteria could accept. The methanogenic bacteria of the system, viz. Methanosarcina barkeri, had some acid resistance and could still degrade methanol at pH 5.0. If the methanogenic bacteria were trained further, their acid resistance would be improved somewhat. Granular sludge of the system could protect the methanogenic bacteria within its body against the impact of the acidic environment and make them degrade methanol at pH 4.5. The performance of granular sludge was attributed to its structure, bacteria species, and the distribution of bacterium inside the granule. Translated from Acta Scientiae Circumstantiae, 2004, 24(4): 633–636 [译自: 环境科学学报]     

Spatial distribution of ecological security status assessment of West-Liaohe River based on geographic information system

Eco-security assessment is a hot research area in resource and environmental science, which involves data with much spatial, non-linear, and random features. Geographic information system (GIS), as a useful tool to analyze and manage spatial information, has a superior advantage in this field. A case study in the western part of the Liaohe River featuring a method of eco-security spatial differences (ESSD) based on GIS is developed in this paper. The method includes four steps: 1) developing the pressure-state-response (P-S-R) framework with site data; 2) digitizing West-Liaohe River and setting its GRID database of ecosecurity assessment indicators; 3) figuring out the relative membership degree (RMD) of eco-security indicators by using the analytical hierarchy process with the weight of indicator; 4) classifying the security zone and mapping the assessment result of eco-security status in grid by GIS method of assigning and clustering. The visual spatial differences of eco-security based on GIS enables decision makers to know the status of eco-security better in making policies for achieving sustainability. __________ Translated from Environmental Science, 2005, 26(5): 28–33 [译自: 环境科学]     

应用改进密切值法进行地表水环境综合评价

针对密切值法应用中的实际问题,引入目标差值率和虚拟优点、劣点的概念,对密切值法进行了改进.将改进后的密切值法应用于地表水环境综合评价中,经实例分析表明,该方法概念清晰、计算简便实用,且从评价结果可获许多潜在的信息,是开展地表水流域水环境综合评价的一种有效的方法.     

处理重金属废水技术的研究进展

如何消除工业废水中重金属对环境和人类健康的危害,并且能够有效地回收废水中的贵重金属离子是环境保护工作者需解决的热点问题之一.详细地介绍了近十几年来国内外,处理重金属废水的技术方法,包括传统方法中的化学沉淀法、电化学法、吸附法和膜分离法,新出现的技术方法如分子印迹法和光催化法,并对以上各种技术方法的机理、研究进展、优点和所面临的主要问题进行了综合评述,同时阐述了处理重金属废水的技术和方法的发展趋势和应用前景.     

SBR处理城市污水中强化脱氮除磷的研究

根据SBR工艺的特征以及氮和磷的去除机理,通过对SBR运行方式进行分析后提出了同时具备脱氮除磷功能的改进的运行方式,并对影响SBR工艺处理效果的因素进行了分析。     

单片机串口通信平台的搭建

文章介绍了串口通信的基本概念、基本原理、RS-232C标准、地震数据采集器与MCS-51单片机的通信连接，同时介绍了串口通信在地震数据传输中的实际应用。     

丁基锡化合物在水体悬浮颗粒物上的吸附行为研究

将海河河口表层底泥制成悬浮颗粒物（ＳＰＭ），采用批量平衡法首次研究了模拟河口条件下三丁基锡（ＴＢＴ）和二丁基锡（ＤＢＴ）在该ＳＰＭ上的吸附行为．结果表明，ＴＢＴ和ＤＢＴ均能在ＳＰＭ上发生吸附，尤以ＴＢＴ更为显著．吸附速率可用Ｋｕｏ和Ｌａｋｅ的经验公式描述；吸附过程受ＳＰＭ的浓度及ＴＯＣ含量、ｐＨ值、温度、腐殖酸浓度和盐度影响．实际河口水样中的ＳＰＭ对ＴＢＴ和ＤＢＴ的吸附百分率也较高，因此ＳＰＭ是ＴＢＴ和ＤＢＴ归趋的重要场所，去除ＳＰＭ可使水体得到一定净化．     

脱硫用煤基吸附剂的试验研究

进行了以煤为原料制备脱硫用吸附剂的实验研究，其中应用炭化与活化的方法，以对ＳＯ２吸附能力为衡量标准，系统地考察了样品在制备过程中不同温度，不同温升速率及时间对ＳＯ２吸附分离能力的影响，力求找出相应的最佳处理过程，并对机理进行探讨。