城市污水的不完全厌氧过程工艺分析

由于不完全厌氧过程的工艺特点 ,其在中国城市污水处理中有着广阔的应用前景。本文侧重分析了不完全厌氧过程工艺在城市污水处理应用中 ,关键性参数的选择以及亟待研究几个不确定问题。     

环境保护理念应成为未来领导的基本素养

领导干部作为经济发展的领路人和带头人,无论对经济发展还是环境保护,无疑肩负着更为重要的使命.培养未来领导的环保理念应当包括:正确的政绩观,经济和环境并重的理念;环境有价、资源有偿的理念;可持续发展理念;节约资源、理性发展的理念;强化法律法规学习,依法保护环境的理念;依托科技,实现资源利用效益最大化、最优化的理念.     

土壤蒸发研究及对旱灾防治的意义

土壤蒸发是地表能量与水分平衡的重要组成部分.本文综述了几十年来土壤蒸发研究基本理论及发展过程,并提出了对于旱灾防治的意义.     

Adsorption and partition of benzo(a)pyrene on sediments with different particle sizes from the Yellow River

Experiments have been carried out to study the sorption of Benzo(a)pyrene(Bap) on sediment particles from the Yellow River using a batch equilibration technique. Effects of particle size on the adsorption and partition of Bap were investigated with the particle content of 3 g/L. Several significant results were obtained from the study. (1) Isotherms of Bap could be fitted with the dual adsorption-partition model under different particle sizes, and the measured value of the adsorption and partition was in agreement with the theoretical value of the dual adsorption-partition model. (2) When the particle diameter was d ⩾ 0.025 mm, the adsorption was predominant in the sorption of Bap, which accounted for 68.7%–82.4% of the sorption. For the particles with the size of 0.007 mm⩽d<0.025 mm, the adsorption was predominant when the equilibrium concentration of Bap was 0–8.87 μg/L in the water phase; and the partition was predominant when the equilibrium concentration of Bap was higher than 8.87 μg/L in the water phase. When the particle diameter was d<0.007 mm, the partition was predominant. (3) On the point of particle size, the contribution of adsorption to sorption followed the order: “d⩾0.025 mm”>“0.007 mm ⩽d<0.025 mm” >“d<0.007 mm”. (4) The partition coefficients of Bap in solids with different particle sizes were linearly correlated with the organic content, and the K _oc of Bap was about 1.26 × 10⁵ (L/kg). Translated from Acta Scientiae Circumstantiae, 2006, 26(2): 269–274 [译自: 环境科学学报]     

厌氧氨氧化工艺在UASB反应器中的启动运行研究

利用UASB反应器进行了厌氧氨氧化工艺的启动运行研究。以自配高氮低碳废水为进水,普通厌氧污泥为接种污泥,在温度35℃,pH7.5～8.0的条件下连续运行220d,成功实现了厌氧氨氧化工艺的启动,氨氮容积负荷为0.43kg/(m~3·d)时,氨氮的去除率最高达88.3％,扫描电镜的观察结果表明,厌氧氨氧化污泥中的细菌以形状不规则的短杆菌为主。     

A/O法在柠檬酸废水处理中的应用

针对当地柠檬酸厂在生产中排放的高浓度有机废水，采用厌氧一好氧法处理工艺，其处理效果明显，最终出水水质符合国家排放标准，CODCr总去除率高达95％，而且运行成本较低，容易在企业中推行。     

应用pH—ORP计自动控制液氯氧化含氰废水

排放量较大的含氰电镀废水,在碱性氯化法处理中以液氯为氧化剂,用PH—ORP计自动控制反应条件和反应终点。该方法自动化程度高,处理效果较好,运行费用低。     

净化汽车尾气的三效催化剂

在我国，汽车尾气对大气的污染日趋严重，使用三效催化剂净化汽车尾气势在必行。介绍了几种主要的三效催化剂及其应用情况。     

海外学子的牵挂

我是一名在海外学习和工作的哈尔滨人。发生在松花江的化学品泄漏事件让我无时无刻不牵挂着生活在那里的父母、亲人和朋友。作为远在大洋彼岸的中国人。我不能“亲历亲为”，但却愿意为祖国的环保事业贡献绵薄之力。     

硫酸亚铁曝气沉降-二氧化氯深度氧化法处理医院高浓度含氰废水的研究

采用硫酸亚铁曝气沉降初级化学处理和ClO2二级深度氧化处理相结合的模式,处理医院排放的高浓度含氰废水.试验表明,初级化学处理中,FesO4·7H2O的加入量为1.2g/L,搅拌强度为80r/min,搅拌时间为30～40min,曝气时间为20min;二级化学处理中,ClO2加入量为0.045g/L,pH值为10～11,氧化时间为15min,采用滤后投加clO 2,出水cN含量小于0.5mg/L,cN去除率97%以上,达到国家一级排放标准GB8978-1996.