溶济萃取法处理含硫酸及硫酸盐的废水

采用溶剂萃取法处理含硫酸及硫酸盐的工业废水，主产优质农用硫酸钾，副产氯化铵和氮钾复合肥，整个工艺过程基本无三废排放，实现了对该废水的综合有效治理。     

生态条件和瘤胃菌丛密度与纤维分解的关系

在自行设计装配的人工模拟瘤胃发酵装置内，用90523-1瘤胃菌丛进行瘤胃体外发酵试验，结果表明纤维素的分解与瘤胃细菌的密度及其类群变化有着密切关系，都受生态环境条件的制约。在发酵温度40℃，搅拌速度为60～70r／min的条件下搅动20min／h，C／N为10：1的生态条件环境中的细菌密度和纤维素分解率都高于相同生态条件的其它梯度组。     

地震科技人员开发能力的灰色关联分析

应用灰色系统理论，根据江苏省地震工程研究院的地震科技开发资料，分别以项目负责人的年龄、学历、职称、职务、学科作为比较数列，对年度内完成的实际合同额进行了多因素灰色关联分析，排出了关联序。研究结果客观地揭示了开发能力与人的各种因素——年龄、学历、职称、职务、学科之间的相互关系，为市场经济条件下，地震科技人才的开发、培养和应用，提供了科学依据。     

复杂人——机系统中的人因失误

随着人——机系统变得越来越多，装置的可靠性越来越高，人因失误已成为重要的潜在事故源。本文描述了复杂人——机系统的特征，探讨了该系统中人因失误的定义、分类、数据采集和事故模型。这些研究有助于对人因失误的预测、预防和减少。     

南滚河自然保护区的蕨类植物资源及其特点

本文记载了南滚河自然保护区蕨类植物２９科４７属５８种和它们的用途、分布区以及生境因子，并对其地理分布和生态特点进行了分析．     

一体化-膜生物反应器物理清洗效果的研究

在一体式一膜生物反应器处理生活污水的基础上，考察了运行过程中膜污染情况。试验结果表明，膜外表面沉积污泥是造成膜污染的主要因素，在活性污泥混合液中搓洗膜丝，是一种方便而有效的清洗方式。间歇式运行方式的停抽期间最低剩余抽吸压力可用来表征运行过程中膜过滤性能的变化。     

新时期城市安全风险防控实践探析——以成都为例

随着我国加快从"乡村社会"迈向"城市社会",城市安全问题成为了新时期亟待解答的"国家命题",分析了城市化与城市风险相关问题,提出了适合成都的安全风险预防指标体系,并以"技术防控"开发建设城市安全监测预警系统,以"标准防控"推动企业和公共领域安全管理标准化,以"群众防控"依托安全社区为载体,构建基层社区公共安全体系,为我国城市安全风险防控体系建设提供了宝贵经验和有益启示。     

Characterization of cattle fecal Streptomyces strains converting cellulose and hemicelluloses into reducing sugars

To characterize Streptomyces isolated from cattle feces for converting lignocellulose into reducing sugars, five Streptomyces strains were screened. All the strains could convert lignocellulose into reducing sugars. The strain A16 accumulate 3.3-folds more reducing sugars on cottonseed shells treated with ethanol than without the treatment (P?<?0.05). The five strains did not accumulate more reducing sugars on rice straws and wheat brans than those on cottonseed shells. Compared with A10 alone, the microbial combination of F1 + A10 accumulated 19, 61, and 25 % less reducing sugars on cottonseed shell, rice straw, and wheat bran than those by A10 solely, respectively (P?<?0.05). Further studies indicated that the activities of avicelase and xylanase were not correlated with the reducing sugar amount accumulated by the test strains. Strain A7 could produce more cellular lipids with xylose and glucose as the sole carbon sources. This study shows the potential for Streptomyces strains from herbivore feces to convert lignocelluloses into lipids and reducing sugars for fuel production.     

Pyrolysis technologies for municipal solid waste: A review

Pyrolysis has been examined as an attractive alternative to incineration for municipal solid waste (MSW) disposal that allows energy and resource recovery; however, it has seldom been applied independently with the output of pyrolysis products as end products. This review addresses the state-of-the-art of MSW pyrolysis in regards to its technologies and reactors, products and environmental impacts. In this review, first, the influence of important operating parameters such as final temperature, heating rate (HR) and residence time in the reaction zone on the pyrolysis behaviours and products is reviewed; then the pyrolysis technologies and reactors adopted in literatures and scale-up plants are evaluated. Third, the yields and main properties of the pyrolytic products from individual MSW components, refuse-derived fuel (RDF) made from MSW, and MSW are summarised. In the fourth section, in addition to emissions from pyrolysis processes, such as HCl, SO₂ and NH₃, contaminants in the products, including PCDD/F and heavy metals, are also reviewed, and available measures for improving the environmental impacts of pyrolysis are surveyed. It can be concluded that the single pyrolysis process is an effective waste-to-energy convertor but is not a guaranteed clean solution for MSW disposal. Based on this information, the prospects of applying pyrolysis technologies to dealing with MSW are evaluated and suggested.     

An improved method used for evaluating potential environmental pollution risk based on spatial distribution and density of farms

Environmental Science and Pollution Research - The livestock manure nitrogen load on farmland (LMNLF) is often used to assess the potential environmental pollution risk of livestock manure nitrogen...