高温取热炉的水循环与安全运行

主要从水循环和循环倍率的角度，谈高温取热炉的安全性，并特别强调开工5天内是高温取热炉的危险期。     

碱法蔗渣制浆黑液循环处理技术研究

对碱法蔗渣制浆黑液良性循环处理技术路线及原理进行研究。研究结果表明 ,此技术路线可行 ,制浆黑液将被全部处理 ,同时实现了液体回用和回收两种实用价值好的产品目标。处理黑液所用的酸化剂转化为制浆药液成分回用于制浆蒸煮 ,得到的浆、纸性能良好。     

湖北省再生资源回收利用现状的调查研究与相关政策建议

通过对湖北省再生资源回收利用现状进行实地和问卷调查,描述了湖北省再生资源回收利用现状;分析存在的问题及成因;并提出了相应的改进措施与建议,促进再生资源行业的快速健康发展;为湖北省建设节约型社会加快发展循环经济提供依据。     

气相色谱法测定蔬菜中有机磷农药残留的前处理方法比较

采用液-液萃取、索氏提取和基质固相分散3种不同的方法对青椒样品进行前处理，用毛细管气相色谱法对处理后样品中的DDV、甲拌磷、甲基-对硫磷和马拉硫磷等农药残留进行测定，并对不同前处理方法的回收率和精密度进行比较。结果：3种方法的回收率和RSD相当，但基质固相分散操作较为方便简单、溶剂消耗量少。     

城市污水再生利用的问题及政策建议

城市污水再生利用是解决我国水资源短缺问题和促进污水处理事业发展的最佳途径,但我国污水再生利用产业还处于起步阶段,必须研究如何健全污水再生利用的运营、管理和激励机制,从而加快城市污水再生利用的产业化进程。     

An approach and preliminary model of integrating ecological and economic constraints of environmental quality in the Guayas River estuary, Ecuador

We describe conceptual and simulation models of land use within the intertidal zone of the Guayas River estuary to quantify the contribution of mangrove wetlands to maintaining environmental quality of a tropical estuary. The goal of this exercise is to demonstrate the important consideration of ecological constraints in determining economic and management decisions; and how modeling can be used to quantify impacts of land use such as loss of mangrove wetlands on environmental quality. Our conceptual model treats solar energy, river flow, and tides as forcing functions that control the properties of estuarine ecosystems, but also describes market forces and cultural policies as constraints on properties of socioeconomic systems. The controversy of coastal resource management in Ecuador centers around the relative impacts of shrimp pond construction and management as negative feedbacks to the environmental quality of the Guayas River estuary. Unique oceanographic processes and land use changes contribute to complex issues of water and habitat quality in this tropical estuary, the largest estuarine complex on the Pacific coast of South America. A dynamic box model was developed for the estuary and calibrated with data collected from a 14 month survey of water quality parameters throughout the estuary. Scenarios included conversion of mangroves to shrimp ponds in three regions of the estuary, and the construction of a dam by varying three different rates of river discharge at 100, 50 and 10% of 1989 base flow. Good water quality is maintained by the low residence time of water in the estuary (11 d) because of seasonally high river flow and tidal exchange. With a 90% reduction of mangrove forests in the estuary caused by shrimp pond construction, total nitrogen concentrations increased 5 fold. However, as river discharge decreased to 10%, the same construction caused a 60 fold increase in nitrogen concentrations to 250 μM. Increases in nitrogen concentrations were higher in the upper estuary region, with much less change in the lower estuary. Thus the sensitivity of environmental quality to changes in land use in the intertidal and upland zone are linked to the hydrography of the estuary and is site specific. In the future, the combinations of these ecological models together with economic analyses of the goods and services of mangroves may provide better techniques to evaluate the economic impacts of specific coastal zone management decisions.     

松江镇饮用水源区水环境管理模型

本文运用系统工程的理论和方法,构造了松江镇饮用水源区水环境管理模型的结构,给出了各子模型形式。然后用多种信息处理方法得到模型中参数的估计值。实际应用表明,该模型精度较高,功能较强,实用性好。     

Harvesting in an eight-species ecosystem

The theory for a general equilibrium ecosystem model that can include large number of interacting species is presented. Features include: (1) individual plants and animals are assumed to behave as if they are maximizing their net energy intake, (2) short- and long-run equilibriums are obtained, (3) species’ population adjustments depend on individual net energies. The theory is applied using simulations of an eight-species Alaskan marine ecosystem for which a “natural” equilibrium is calculated. Humans are introduced by adding a regulated open access fishery that harvests one of the species. Fishing impacts the fish population as well as the populations of other species, including Stellar sea lions, an endangered species. The sensitivity of fish and nonfish species populations to harvesting are calculated.     

炼油厂轻污染水回用试验研究

针对某炼油厂轻污染废水水质情况，选用了BAF（生物曝气滤池）工艺＋SF（砂滤）工艺对该废水进行净化处理。通过试验研究，得到了BAF工艺合适的运行参数，取得了满意的试验结果。经BAF工艺处理后，出水COD和油平均浓度分别为9.78mg／L和0.24mg／L，再经SF工艺进一步去除SS后，出水SS平均浓度为3．8mg／L，系统处理出水完全达到工业回用水水质要求。试验证明：BAF工艺是一种高效的处理方法，适合炼油厂轻污染水的净化处理。     

试论湖南经济新世纪发展的战略问题

名牌强省是湖南经济新世纪发展的重大战略，其基本思路应以名牌为龙头组建企业集团，实现经济的规模联动；以名牌为杠杆优化产业、产品结构，提高经济增长质量；以名牌为支撑提高企业竞争力，走名牌强省之路。