SBR处理城市污水中强化脱氮除磷的研究

根据SBR工艺的特征以及氮和磷的去除机理,通过对SBR运行方式进行分析后提出了同时具备脱氮除磷功能的改进的运行方式,并对影响SBR工艺处理效果的因素进行了分析。     

清洁生产审计在环境影响评价中的应用

在建设项目环境影响评价现状基础上,提出清洁生产的概念,并将清洁生产审计贯穿于环境影响评价工作中,同时对清洁生产下的环境影响评价程序及方法等进行了分析,指出了今后环境影响评价工作的发展方向。     

Purification and reclamation of wastewater by an integrated biological pond system

ＰｕｒｉｆｉｃａｔｉｏｎａｎｄｒｅｃｌａｍａｔｉｏｎｏｆｗａｓｔｅｗａｔｅｒｂｙａｎｉｎｔｅｇｒａｔｅｄｂｉｏｌｏｇｉｃａｌｐｏｎｄｓｙｓｔｅｍＷｕＺｈｅｎｂｉｎ；ＸｉａＹｉｃｈｅｎｇ；ＺｈａｎｇＹｏｎｇｙｕａｎ；ＤｅｎｇＪｉａｑｉ；ＣｈｅｎＸｉｔａ...     

油松排放萜烯类化合物浓度的日变化及排放速率的研究

 采用封闭式采样和气相色谱法分析监测了北京主要树种油松排放的萜烯类化合物，其中包括α和β蒎烯、蒈烯、松油烯、柠檬烯和罗勒烯，以及少量异戊二烯。松油烯、B蒎烯、柠檬烯和蒈烯的排放量之和占油松排放碳氢总量的94％以上。萜烯和异戌二烯排放速率随日照和温度的升高而增加。萜烯等浓度的日变化表明在正午和午夜油松有两个排放高峰。在日均气温为18℃时油松的碳氢化合物平均总排放速率约为8.7μh/h.g。     

新疆老山口金矿岩浆隐爆角砾岩地质地球化学

新疆东准噶尔老山口金矿区发育有与金矿化密切有关的次火山闪长玢岩及与之密切伴生的闪长玢岩质隐爆角砾岩和闪斜煌斑岩质隐爆角砾岩 ,它们是在陆相火山作用下由同源岩浆分异演化而形成的产物。角砾岩具有浅成—超浅成环境及热塑、高压释放状态下的成岩特征。角砾岩的角砾、胶结物和次火山岩三者的岩石类型、岩相学特征和地球化学特征基本一致 ,具有稀土总量较低 ,轻稀土相对富集 ,重稀土相对亏损 ,铕异常不明显 ,大离子亲石元素相对富集 ,高场强元素相对亏损等特征。结合其构造背景、地质产状、岩石学和地球化学特征分析 ,这套岩石来源于受俯冲洋壳释放富含大离子亲石元素或强不相容元素流体交代过的亏损地幔楔。     

Carbon mitigation potential and costs of forestry options in Brazil,China, India,Indonesia, Mexico,the Philippines and Tanzania

This paper summarizes studies of carbon (C) mitigation potential and costs of about 40 forestry options in seven developing countries. Each study uses the same methodological approach – Comprehensive Mitigation Assessment Process (COMAP) – to estimate the above parameters between 2000 and 2030. The approach requires the projection of baseline and mitigation land-use scenarios. Coupled with data on a per ha basis on C sequestration or avoidance, and costs and benefits, it allows the estimation of monetary benefit per Mg C, and the total costs and carbon potential. The results show that about half (3.0 Pg C) the cumulative mitigation potential of 6.2 Petagram (Pg) C between 2000 and 2030 in the seven countries (about 200× 10⁶ Mg C yr^-1) could be achieved at a negative cost and the remainder at costs ranging up to $100 Mg C^-1. About 5 Pg C could be achieved, at a cost less than $20 per Mg C. Negative cost potential indicates that non-carbon revenue is sufficient to offset direct costs of these options. The achievable potential is likely to be smaller, however, due to market, institutional, and sociocultural barriers that can delay or prevent the implementation of the analyzed options.     

陕北能源重化工基地社会经济与环境协调发展研究——以榆林市为例

分析了陕北能源重化工基地社会经济与环境发展的矛盾，指出环境与社会经济的协调发展是实现可持续发展的前提和基础。文章分析了环境与社会经济协调发展的含义，建立了社会经济系统与环境系统评价的指标体系，采用主成分分析与回归分析相结合的综合评价方法，以榆林市为例，借助SPSS分析软件，对陕北能源重化工基地建设中的社会经济与环境协调发展进行定量评价。根据评价得出了榆林市社会经济系统与环境系统发展协调度不高的结论，并对其社会经济系统与环境系统协调发展状况进行了讨论，最后提出了实现两系统协调发展的建议。     

Effects of cultivation on N2O emission and seasonal quantitative variations of related microbes in a temperate grassland soil

ＩｎｔｒｏｄｕｃｔｉｏｎＡｔｍｏｓｐｈｅｒｉｃｎｉｔｒｏｕｓｏｘｉｄｅ (Ｎ2 Ｏ)ｉｓａｖｅｒｙｒａｄｉｏａｃｔｉｖｅｌｙａｃｔｉｖｅｇｒｅｅｎｈｏｕｓｅｇａｓ,ａｌｓｏｃｏｎｔｒｉｂｕｔｉｎｇｔｏｔｈｅｄｅｐｌｅｔｉｏｎｏｆｏｚｏｎｅｌａｙｅｒｏｆｓｔｒａｔｏｓｐｈｅｒｅ .ＡｔｍｏｓｐｈｅｒｉｃＮ2 Ｏｍａｉｎｌｙｏｒｉｇｉｎａｔｅｄｆｒｏｍｎｉｔｒｉｆｉｃａｔｉｏｎａｎｄｄｅｎｉｔｒｉｆｉｃａｔｉｏｎｉｎｔｅｒｒｅｓｔｒｉａｌｅｃｏｓｙｓｔｅｍｓ.Ｇｒａｓｓｌａｎｄｅｃｏｓｙｓｔｅｍ ,ａｃｃｏｕｎ…     

草浆造纸中段废水的生物处理动力学

利用静态溶解氧消耗速率（OUR）试验模拟草浆造纸中段废水生物处理的生化反应过程,并运用Lawrence-McCarty模式进行了动力学分析。由OUR试验结果和小试研究结果建立的草浆造纸中段废水好氧生物处理的动力学方程为v=0.72S/(60.43 S）。将该动力学方程预测结果和实际工程的运行数据进行了比较,结果表明,动力学方程的比基质降解速率预测值高于实际工程的计算值,分析原因可能在于：实际工程中中段废水中的纤维素类悬溪物在生物处理装置的积累导致了污泥活性的降低。     

Production of laccase by Coriolus versicolor and its application in decolorization of dyestuffs : (Ⅰ) Production of laccase by batch and repeated-batch processes

The production of laccase by Coriolus versicolor was studied.The effect of cultivation on laccase production by Coriolus versicolor was examined to obtain optimal medium and cultivation conditions.Both batch and repeated-batch processes were performed for laccase production.In repeated-batch fermentation with self-immobilized mycelia, total of 14 cycles were performed with laccase activity in the range between 3.4 and 14.8U/ml.