厌氧折流板反应器处理有毒废水及其污泥特性的研究

在１６．２Ｌ厌氧折流板反应器中，处理以葡萄糖为共基质的含五氯酚钠（ＰＣＰ－Ｎａ）有毒废水，进水ＣＯＤ为１１００－１２００ｍｇ／Ｌ，ＨＲＴ为１d。结果表明，ＡＢＲ 对有毒物负荷变化的适应能力强，当进水ＰＣＰ－Ｎa小于８ｍｇ／Ｌ时，出水ＣＯＤ在８０ｍｇ／Ｌ以下，ＰＣＰ－Ｎa在０．２ｍｇ／Ｌ以下，运行稳定。在有毒物低于抑制浓度 下反应器内参形成颗粒污泥，颗粒污泥表面为发酵产酸菌，内部为产甲烷菌，自身形成良好     

浙东南早白垩世火山—沉积岩系地层划分

浙东南下白垩统火山岩极为发育,岩石组合与浙江中部永康群差异甚大,称之为馆头组和朝川组似不合适。文成县峃口镇龙潭山(又称龙井山)剖面具代表性,拟以此部面为基础建立梅坪组和龙潭山组,合称文成群。与永康群对比,梅坪组大体相当馆头组,龙潭山组与朝川组和方岩组对比。     

使用VB.NET绘制大气污染物浓度分布等值曲线

大气污染物浓度分布等值曲线的绘制是大气环境影响预测的一项重要工作.采用优化的黑白域矩形网格序列法,结合VB.NET环境下Metafile对象提供的矢量图形绘制新技术,可在一次数据扫描过程中同时实现黑白域划分、黑域边界提取、等值点拟合计算及序列化、等值线绘制等操作,计算量小、效率高、代码量少,可绘制任意浓度等值线,且等值线不相切.     

Study of prediction for groundwater contamination in wastewater land treatment system

This paper uses a prediction model of groundwater pollution based on the experiments in the laboratory and in field .The model, which was tested and calibrated by the field observated data ,satisfactorily simulated the field conditions in land treatment system of wastewater . Particularly , the model can provide the reliable pollution prediction of heavy metals , organisms and nitrogen . The model was used to predict the groundwater pollution caused by the land treatment system in the region of North China . The calibration of the model showed that correlation coefficients between the tested and predictive data of Cr6+. As3+, organism and NH4+ could reach 0.990, which proved that the model possessed the realistic instructive significance for design and use of wastewater land treatment systems .     

秦沈客运专线路基声屏障工程设计与施工

秦沈客运专线首次在通过村庄附近地段的路基上设计安装声屏障工程 ,作为降低列车通过时的噪音、减弱扰民程度的重要措施。文中介绍了声屏障工程的设计与施工、管理等情况。     

Bipolar charged aerosol agglomeration and collection by a two-zone agglomerator

ＩｎｔｒｏｄｕｃｔｉｏｎＢｅｃａｕｓｅｏｆｔｈｅｌｏｗｅｆｆｉｃｉｅｎｃｙｏｆｔｈｅｅｌｅｃｔｒｏｓｔａｔｉｃｐｒｅｃｉｐｉｔａｔｏｒ (ＥＳＰ)ｆｏｒｃｏｌｌｅｃｔｉｎｇｔｈｅｓｕｂｍｉｃｒｏｎｐａｒｔｉｃｌｅｓ ,ｔｈｅｅｌｅｃｔｒｉｃａｌａｇｇｌｏｍｅｒａｔｉｏｎｍｅｔｈｏｄｈａｓｌｅｄｔｏａｎｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｉｎｒｅｄｕｃｉｎｇｔｈｅｅｍｉｓｓｉｏｎｏｆｔｈｅｆｉｎｅｐａｒｔｉｃｌｅｓ .Ｍａｎｙａｕｔｈｏｒｓｈａｖｅｓｔｕｄｉｅｄｅｌｅｃｔｒｉｃａｌａｇｇｌｏｍｅｒａｔｉ…     

Fulvic acid removal by nanoparticle TiO2 using a submerged membrane photocatalysis reactor

The degradation of fulvic acid（FA） by nanoparticle TiO2 in a submerged membrane photocatalysis（SMPC） reactor was studied. In this reactor, photocatalytic oxidation and membrane separation co-occured. The continuous air supplier provided O2 for the photocatalytical reaction and mixed the solution through an airflow controller. The particle TiO2 could automatically settle due to gravity without particle agglomeration so it could be easily separated by microfiltration（MF） membrane. It was efficient to maintain high flux of membranes. The effects of operational parameters on the photocatalytic oxidation rate of FA were investigated. Results indicated that photocatalyst at 0.5 g/L and airflow at 0.06 m^3/h were the optimum condition for the removal of fulvic acid, the removal efficiency was higher in acid media than that in alkaline media. The effects of different filtration duration on permeate flux rate of MF with P25 powder and with nanoparticle TiO2 were compared. Experimental results indicated that the permeate flux rate of MF was improved and the membrane fouling phenomenon was reduced with the addition of nanoparticle TiO2 catalyst compared with conventional P25 powder. Therefore, this submerged membrane photocatalysis reactor can faciliate potential application of photocatalytic oxidation process in drinking water treatment.     

洞庭湖区湿地资源可持续利用途径研究

湿地具有特殊的生态功能和社会经济价值。洞庭湖区湿地垦殖强度大,造成了生态环境严重退化的恶果。研究表明:控制人口总量,退田还湖,建立湿地自然保护区,大力发展避洪耐涝型湿地特色产业是保护和合理利用湿地资源的有效途径,且已取得了良好的社会、经济、生态效益。由此认为,如何协调好人口、资源与环境的关系是实现湿地资源可持续利用的战略目标。     

浅谈水电工程中混凝土生产系统环保措施

以现在水电工程建设中的混凝土生产系统为基础,从水土保护保持、废水、废气、废油排放,粉尘污染,噪声污染,交通运输,废料,生活废水,垃圾等方面为工程提供混凝土生产系统的环保控制措施.     

多环芳烃的污染及其生物修复

多环芳烃(PAHs)是环境介质中普遍存在的难降解有机污染物，文中综述了目前国内外对PAHs的研究状况，重点阐述了它的来源分布、迁移转化、生物毒性、监测控制及其生物修复的研究进展等，从而为防治环境污染提供科学依据。