泥石流在两河交汇处堵江后坝体渗流模型的研究

采用重正化群方法算出三维自由渗流模型的渗流阀值 ,在此基础上提出三维具有自相似性质的渗流模型。并在此模型下分析了在实际观测中坝体对岸处易溃坝的原因以及从泥石流堵江后坝体衍化的角度探讨了它崩溃的机理     

建设低碳城市实现经济与环境双赢的思路

论述了发展低碳经济成为时代的必然,我国城市发展模式必须树立经济与环境融合的思维模式,依靠科技进步转变经济发展的模式,由出口导向型向消费拉动型的模式转变等。     

污泥陶粒流离球填料的应用研究

填料是流离生化技术处理污水的关键材料。文中模拟试验污水处理过程,测试污泥流离球填料的挂膜情况和污染物去除能力。确定运行适应性参数DO水平为4～5mg/L,水力停留时间4h,反应温度22℃,反应pH值7～9时,实施处理配制污水试验的结果表明,净化后污水CODcr和NH3-N去除效果良好,污水净化后符合国家"污水综合排放标准"二级标准的要求,污泥陶粒流离球填料应用于污水处理可行。     

实施精细化管理 促进排污费征收

论述了在国家排污费征收新条例实施后,淮安市在加强排污费征收的精细化管理方面所做的有益探索性方面的工作。     

浅谈齐齐哈尔市的生态环境问题与改善途径

着重论述了齐齐哈尔市生态环境存在的八个问题与改善生态环境的六个创新。     

大庆市土地利用动态变化分析与预测

本文主要以土地利用类型的时空变化为研究重点,通过数学建模,来研究大庆市土地利用的时空演变,尤其重点研究大庆市土地利用动态变化的预测。     

五大连池中细菌总数与理化指标的关系初探

本文于对黑龙江省五大连池六个采样点2010年不同季节的水样进行分析,用稀释平板法测定细菌总数,碘量法测定DO值,然后时细菌、DO值及pH值的季节变化和它们之间的相互关系进行初步研究。     

Bioaccumulation of hexachlorobenzene in Eisenia foetida at dierent aging stages

The impacts of contact time on the extractability, the availability of hexachlorobenzene (HCB) in dierent soils (paddy soil, red soil, and uvo-aquic soil) and bioaccumulation in earthworm Eisenia foetida were investigated under controlled conditions in laboratory. Results indicated that the aging rate of HCB displaying a biphasic character in dierent soils: a rapid aging in the first 60 d followed by a slow aging in the next 120 d incubation time. Moreover, most of extractable HCB (about 90%) decline occurr...     

应用灰色系统理论预测拉林河总磷浓度变化趋势

本文利用灰色系统理论,根据以前监测数据,通过建立GM(1,1)模型和模型群,预测出拉林河水体中总磷浓度及其变化趋势.     

Efficient degradation of lube oil by a mixed bacterial consortium

A laboratory study was performed to assess the biodegradation of lube oil in bio-reactor with 304# stainless steel as a biofilm carrier. Among 164 oil degrading bacterial cultures isolated from oil contaminated soil samples, Commaonas acidovorans Px1, Bacillus sp. Px2, Pseudomonas sp. Px3 were selected to prepare a mixed consortium for the study based on the efficiency of lube oil utilization. The percentage of oil degraded by the mixed bacterial consortium decreased slightly from 99% to 97.2% as the concentration of lube oil was increased from 2000 to 10,000 mg/L. The degradation of TDOC (total dissolved organic carbon) showed a similar tendency compared with lube oil removal, which indicated that the intermediates in degradation process hardly accumulated. Selected mixed bacterial consortium showed their edge compared to activated sludge. Scanning electron microscopy (SEM) photos showed that biofilms on stainless steel were robust and with a dimensional framework constructed by EPS (extracellular polymeric substances), which could promote the biodegradation of hydrocarbons. The increase of biofilm followed first-order kinetics with rate of 0.216 μg glucose/(cm2·day) in logarithm phase. With analysis of Fourier transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC-MS) combined with removal of lube oil and TDOC, mixed bacterial consortium could degrade benzene and its derivatives, aromatic ring organic matters with a percentage over 97%.