用喷射鼓泡反应器进行烟气脱硫

介绍了采用喷射鼓泡反应器处理烟气量为7 000~10 000 m3/h的软锰矿浆烟气脱硫中试试验。试验中,对喷射鼓泡反应器及系统的阻力进行了测定,考察了不同品位、不同液固比的软锰矿条件及系统连续运行时的脱硫率和锰浸出率。中试表明,在液固比为(2~3)∶1、矿粉粒度约为100目的连续运行条件下,无论是选用品位高的钦锰矿还是品位低的软锰矿,系统运行稳定,且脱硫率保持在90%以上,锰浸出率在70%以上。吸收液经净化处理后得到的MnSO4.H2O产品可达到国家GB1622—86标准。     

Correlation of climatic factors and dengue incidence in Metro Manila, Philippines

Dengue is a serious public health problem in Metro Manila, Philippines. Increasing dengue incidence has been attributed to climate change; however, contradicting reports show inconclusive relationships between dengue and climatic factors. This study investigates temperature and rainfall as climatic factors affecting dengue incidence in Metro Manila from 1996 to 2005. Monthly dengue incidence and climatic data for Metro Manila were collected over a 10-y period (1996-2005). Climatic factors temperature and rainfall were linked with dengue incidence through regression analysis. A predictive model equation plots dengue incidence (Y) versus rainfall (X), which suggests that rainfall is significantly correlated to dengue incidence (r2 = 0.377, p < 0.05). No significant correlation between dengue incidence and temperature was established (p > 0.05). Evidence shows dengue incidence in Metro Manila varies with changing rainfall patterns. Intensified surveillance and control of mosquitoes during periods with high rainfall are recommended.     

蚯蚓生态滤池处理农村生活污水现场试验研究

对蚯蚓生态滤池处理太湖流域农村生活污水进行现场试验研究.通过对蚯蚓同化容量与污染负荷进行单因素分析,得出蚯蚓生态滤池处理农村生活污水的运行参数与运行方式,并据此进行连续运行试验.结果表明,在表面水力负荷1 m3/(m2*d)、湿干比(布水时间和落干时间之比)1∶3、蚯蚓负荷(以单位体积填料中蚯蚓的质量计)12.5 g/L的条件下,蚯蚓生态滤池处理农村生活污水具有可行性与高效性,单级系统的COD、总氮、氨氮和总磷的去除率分别在81%、66%、82%和89%左右.改进蚯蚓床填料、设计通风结构和采取适宜运行方式,是蚯蚓生态滤池成功应用于农村生活污水处理的三大重要因素.     

Characterizing effects of uncertainties in MSW composting process through a coupled fuzzy vertex and factorial-analysis approach

A coupled fuzzy vertex and factorial-analysis approach was developed in this study for systematically characterizing effects of uncertainties in a municipal solid waste composting process. A comprehensive composting process model was also embedded into the system framework and used to address substrate decomposition and biomass growth, as well as the interactions between moisture contents, temperatures, and oxygen concentrations. The applicability of the proposed method was verified through a custom-made pilot-scale composting system. Results from fuzzy simulation indicated that the fuzzy vertex method could effectively communicate implicit knowledge into dynamic simulations and thus provide valuable information for enhancing composting process control under uncertainty. The factorial analysis was effective in quantifying the proportion to which the uncertainty of each single or interactive effect of model parameters contributes to the overall uncertainty of the system outcomes. Thus, sensitive parameters that may lead to errors or unreasonable predictions can be determined. The proposed study system could not only be used in characterizing combined effects of uncertainties for composting processes, but was also applicable to many other environmental modelling systems.     

Informal Emptying Business in Mandalay: Its Reasons and Financial Impacts

Environmental Management - Globally, 2.8 billion people use on-site sanitation facilities, which need regular emptying of accumulated fecal sludge. Illegal dumping from informal emptying...     

金黄色葡萄球菌的演相培养及A蛋白的提取

对金黄色葡萄球菌（Ｓｔａｐｈｙｌｏｃｏｃｃｕｓａｕｒｅｕｓ）ＣｏｗａｎⅠ的培养及Ａ蛋白提取工艺进行了优化研究．结果表明：在培养基中分别增加牛肉膏和蛋白陈的含量，有利于提高菌体生物量及Ａ蛋白的得率；少量酵母浸膏及葡萄糖对生物量及Ａ蛋白得率有促进作用，但当达到一定浓度时则会产生基质抑制作用；恒定培养过程的ｐＨ值有利于Ａ蛋白得率的增加，０．０３（）／ｍｉｎ通气量、搅拌速度２００ｒ／ｍｉｎ是能满足菌体生长的条件．根据Ａ蛋白耐热性强这一特性，采用加热法除去大部分杂质，然后用ＩｇＧ－琼脂糖凝胶亲和层析实现了Ａ蛋白的提纯．     

运用灰色系统理论对广州市环境噪声污染的原因进行分析

运用灰色系统关联度的分析方法，对广州市环境污染的原因进行分析，结果显示：影响广州市环境噪声的因素中，占主要地位的是城市机动车数量，其次是人口密度。     

内蒙古流沙山金(钼)矿床地质特征及矿床类型的划分

流沙山矿床是近年来在内蒙古西部发现的一处金 (钼 )矿床。金 (钼 )矿化主要在海西期花岗闪长岩内呈大脉细脉和线脉产出 ,其空间展布形态受一系列环状断裂带控制。金 (钼 )矿体多为环状到半环状透镜体 ,局部地段为扁豆群和楔状体。矿石的金属矿物有辉钼矿、白钨矿、辉铋矿、黄铜矿、黄铁矿、钼钙矿、自然金和银金矿。脉石矿物有石英、钾长石、斜长石、黑云母和角闪石 ,其中辉钼矿Re Os同位素等时线年龄为 (2 6 0±10 )× 10 6a。矿体的围岩蚀变主要有硅化和钾化 (钾长石化和绢云母化 ) ,次为绢英岩化和青盘岩化。本文重点研究了与矿化有关的花岗岩类岩相学和岩石化学 ,阐述了金 (钼 )矿床的矿化特征 ,划分了矿床的蚀变分带。在对比流沙山金 (钼 )矿床与国内外经典性斑岩型金属矿床主要特征的基础上 ,将流沙山 (钼 )矿床确定为深成岩型斑岩金 (钼 )矿床     

1：1000000中国草地资源图的编制与研究

编制１：１００００００中国草地资源图（以下简称《草地图》）是＂１９７８～１９８５年中国科学技术发展规划＂中的一项重点研究课题。首先在全国约８００万ｋm₂草地分布区的２０００多个县内进行野外实地调查和产草量测定,辅以航、卫片校核,编绘县级１：５万或１：１０万草地类型图、草地等级图、草地利用现状图。然后采用系列制图方法,遵照全国统一的编制规范和制图综合原则,用上述县级草地图逐级缩编成国家级１：１００万草地资源图。该图在不同的制图区域──牧区、半农半牧区、农区有不同的地理要素选择标准;不同的图斑表现级;不同的最小图斑面积。《草地图》除传统地表现草地植被类型外,还表现草地利用性状,按制图单元进行草地等级评价。用变距等高距选取了少量对划分草地类型界线、重要牧草分布界线、季节草地界线有重要指示意义的等高线。     

哈大齐工业走廊污染防治工作的思考

哈大齐(哈尔滨、大庆、齐齐哈尔)工业走廊将成为黑龙江省工业集中快速发展的工业带,该区域地处松嫩平原的腹地,其环境特点是环境空气容量大,水资源贫乏,排水困难,草原生态环境脆弱.湿地保护区面积大.在污染防治方面要大力推行循环经济,注意生态保护.