低DO浓度下短程硝化试验研究

进水氨氮浓度不变，低DO下启动并运行了短程硝化试验，考察了反应器内的氨氮氧化和亚硝酸盐积累情况。试验结果表明反应器内氨氮几乎全部被氧化，污泥浓度从4500mg／L下降到870mg／L，此时亚硝酸盐的积累率为55％，说明只控制DO的浓度很难实现高的积累率，同时受到温度和污泥龄等的较大影响。     

加强云南环境保护宣传教育力度--积极开创"绿色社区"

从云南环境宣传教育现状出发,分析了目前在云南创建“绿色社区”的现实意义、必要性,并提出了创建的评选标准细则和评选的基本办法,为今后云南创建“绿色社区”提供参考性意见。     

元磨高速公路边坡生物防护技术研究

对云南元磨高速公路的边坡生物防护的植物筛选技术和施工工艺进行了研究。试验探索了湿法喷播中草灌的比例问题，发现了短萼灰叶(山毛豆)是适宜的灌木种，并提出了“两步施工法”。     

洗车业污染现状及管理对策

城市洗车业存在水资源严重浪费，行业管理不到位导致水体污染等诸多问题，却没能引起有关部门重视。为此，针对洗车业存在的问题，以徐州市为例，从管理、技术、经济等多角度、多层面进行分析，提出了相应的建议和对策。     

Spatial variations in daily average CO2 concentrations above wetland surface of Xianghai National Nature Reserve, China

Horizontal and vertical variations of daily average CO2 concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO2 concentration on the four levels of height(0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO2 concentration under different land covers. Results showed that daily average CO2 concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO2 in August and acted as“sink” of CO2. The horizontal variations on the four levels of height along the latitude were distinct, and had the changing tendency of“decreasing after increasing” with the increase of height. The areas with obvious variations were consistent on different levels of height,and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO2 concentrations above wet!and surface were affected by surface qualities and land covers.     

Application of compost in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Escherichia coli O157:H7. This study investigated pathogenic bacteria in compost collected from the compost facilities, an

IntroductionIncreasing public interests have been concerned onsafety foods and the environmental aspects recently,especially on the so-called organic foods , which are madefromcrops grown with organic fertilizers or compost but notchemical fertilizers .Pu…     

江苏省环保信访演变趋势与对策研究

以江苏省为例,着重分析环保信访演变的特点和发展趋势以及产生的主要原因,提出了今后进一步加强环保信访工作的对策措施。     

县域生态功能区划研究——以桐柏县为例

结合桐柏县的实例,对县域生态功能区划分的原则和方法进行初步探讨.综合利用3S技术对县域生态敏感性和生态服务功能重要性的分析和评价,提出桐柏县生态服务功能区划的初步方案.将桐柏县划分为生态支持区,产品供给区,生态调节区.简要分析了各功能区在桐柏县经济可持续发展中的地位和作用,指出各区协调发展的方向和途征.     

新疆玛纳斯河流域农业水资源可利用潜力分析

结合新疆玛纳斯河流域水文水资源、种植结构和节水技术发展等资料,从开源、节流两方面对流域近期(至2010年)、中远期(2010-2030年)农业水资源极限潜力、可挖掘潜力进行了估算。结果表明,就目前水资源的利用水平和开发趋势,玛纳斯河流域未来农业水资源的主要利用途径是开源与节流相结合,以节流为主。全流域尚有的农业灌溉水资源极限潜力为10.75×10⁸m³,近期农业水资源可挖掘潜力为2.13×10⁸m³,其中开源增水潜力0.40×10⁸m³,占18.8%,节流增水潜力1.73×10⁸m³,占81.2%;中远期农业水资源可挖掘潜力5.33×10⁸m³,其中开源增水潜力1.12×10⁸m³,占21.0%,节流增水潜力4.21×10⁸m³,占79.0%。该研究对区域制订节水灌溉规划及水资源系统优化配置具有重要参考价值。     

污泥活性炭对染料的吸附动力学研究

以城市污水处理厂脱水污泥作为原料,采用化学活化法(ZnCl2作为活化剂)制得污泥活性炭,全面研究了污泥活性炭对活性艳红K-2BP、酸性大红GR和直接紫N这3种染料的吸附动力学行为.结果表明,污泥活性炭可以有效地吸附染料,实现污泥的资源化;3种染料的平衡吸附量qe均随着染料初始浓度和温度的增大而增大,相同条件下平衡吸附量qe的大小顺序为:酸性大红GR＞活性艳红K-2BP＞直接紫N;伪二级动力学模型能够很好地描述3种染料在污泥活性炭上的吸附动力学行为;对于活性艳红K-2BP和直接紫N,颗粒内扩散过程是该吸附速率的控制步骤,但不是唯一的速率控制步骤,吸附速率同时还受颗粒外扩散过程的控制,而对于酸性大红GR,颗粒内扩散过程不是吸附速率的控制步骤;污泥活性炭对3种染料的吸附是一个吸热过程,吸附活化能较小,主要为物理吸附过程.