有效降解万古霉素废水COD的真菌菌株筛选及研究

从本实验室保存的447株真菌中筛选出1株能有效降解万古霉紊废水COD的真菌HCCB00304.通过形态观察及分子生物学分析,鉴定该菌株为绿僵菌.利用真菌HCCB00304处理万古霉素废水的最佳条件为:菌体投加量10%(体积分数)、初始pH 6.00、25℃、处理时间60 h,在此条件下可使废水的COD从114 208 mg/L降到56 145 mg/L,COD降解率为50.84%.反应动力学分析表明,COD降解呈一级反应动力学过程,其降解速率常数为0.013 3 h-1.     

Kinetic studies of O3 reactions with 3-bromopropene and 3-iodopropene in the temperature range 288–328 K

The kinetics of the reactions of O₃ with 3-bromopropene and 3-iodopropene has been studied over the temperature range of 288–328 K at atmospheric pressure. The results obtained for the room temperature rate constants are (1.88 ± 0.22) × 10^?18 and (3.52 ± 0.43) × 10^?18 cm³ molecule^?1 s^?1, and the proposed Arrhenius expressions are k = (3.47 ± 1.28) × 10^?15 exp[(?2233 ± 110)/T] and k = (8.17 ± 2.12) × 10^?14 exp[(?2991 ± 80)/T] cm³ molecule^?1 s^?1 for 3-bromopropene and 3-iodopropene, respectively. The atmospheric chemical lifetimes of these two compounds with O₃ were also estimated from these values.     

Greening China Naturally

China leads the world in afforestation, and is one of the few countries whose forested area is increasing. However, this massive "greening" effort has been less effective than expected; afforestation has sometimes produced unintended environmental, ecological, and socioeconomic consequences, and has failed to achieve the desired ecological benefits. Where afforestation has succeeded, the approach was tailored to local environmental conditions. Using the right plant species or species composition for the site and considering alternatives such as grassland restoration have been important success factors. To expand this success, government policy should shift from a forest-based approach to a results-based approach. In addition, long-term monitoring must be implemented to provide the data needed to develop a cost-effective, scientifically informed restoration policy.     

Influences of influent carbon source on extracellular polymeric substances (EPS) and physicochemical properties of activated sludge

It is necessary to understand the bioflocculation, settling and dewatering characteristics in the activated sludge process in order to establish more efficient operational strategies. The influences of carbon source on the extracellular polymeric substances (EPS) and flocculation, settling and dewatering properties of the activated sludge were investigated. Laboratory-scale completely mixed activated sludge processes were used to grow the activated sludge with different carbon sources of starch, glucose and sodium acetate. The sludge fed with acetate had highest loosely bound EPS (LB-EPS) and that fed with starch lowest. The amount of tightly bound EPS (TB-EPS), protein content in LB-EPS, polysaccharide content and protein contents in TB-EPS, were independent of the influent carbon source. The polysaccharide content in LB-EPS of the activated sludge fed with sodium acetate was lower slightly than those of starch and glucose. The sludge also had a nearly consistent flocs size and the sludge volume index (SVI) value. ESS content of the sludge fed with sodium acetate was higher initially, although it was similar to those fed with glucose and starch finally. However, the specific resistance to filtration and normalized capillary suction time fluctuated first, but finally were stable at around 5.0 × 10⁸ m kg⁻¹ and 3.5 s L g⁻¹ SS, respectively. Only the protein content in LB-EPS weakly correlated with the flocs size and SVI of the activated sludge. But there was no correlation between any other EPS contents or components and the physicochemical properties of the activated sludge.     

新疆市政排水区湿地的形成与应用研究

分析了新疆城市与园区排水区下游市政排水湿地的成因,结合湿地的概念,划分出不同类型。结合湿地在新疆的应用实例,说明市政排水区湿地区生态演替特征,并提出了与湿地应用有关的管理与配套措施。     

海泡石改性及在酱油废水处理中的应用研究

通过正交实验对海泡石改性条件及在酱油废水处理中的应用进行了实验研究。结果表明,酸度是海泡石改性的主要影响因素,海泡石在酸度4%,温度120℃,时间12 h下改性,对酱油废水的脱色效果较好;当酱油废水浓度为1 033 mg/L,改性海泡石投加量为3 g(液固比70∶1),pH5,反应时间90 min,改性海泡石对废水COD和色度的去除率分别达到59.6%和76.4%。     

Projecting Spatial Patterns of Flood Hazard: Recent Climate and Future Changes over Yangtze River Basin

Projection of hazard changes in climate extremes is critical to assessing the potential impacts of climate change on human and natural systems. Using simulations of providing regional climates for impacts studies, five indicators (rainstorm days, maximum 3-day precipitation, elevation, gradient and distance from river or lake) were selected to project the spatial patterns of flood hazard over Yangtze River Basin for the baseline period (1961– 1990) and future (2011–2100) under SRES B2 scenario. The results ...     

浅析企业一线岗位员工在节能减排中如何发挥作用

文章主要阐述了作为新世纪石油企业的一名石油工人,每个人都应该发挥主人翁的责任意识,积极响应国家号召,紧紧围绕"节能减排,科学发展"主题,结合企业实际,动员广大一线岗位员工多形式开展节能减排工作,为构建资源节约型、环境友好型企业而努力。     

超稠油污水深度处理工艺技术

针对辽河油田超稠油污水的特点设计了处理工艺流程,进行了药剂的筛选,根据各工艺设备的出水水质要求确定了合适的净水剂、除硅剂、阻垢剂的加量,并进行了现场实际应用,外输出水达到锅炉给水指标要求,用于锅炉注汽使用,效果良好,分析了该超稠油污水处理技术的特点和优势,提出了超稠油污水回用锅炉的建议。