在较高位置构筑大型隔声屏的降噪工程

在控制工厂二层楼顶的风机群及冷却塔群的噪声工程中，复式隔声屏获１８ｄＢ（Ａ）的降噪效果。主屏由轻结构板及隔振底盘组成。主习体被若干伸缩隔断以消除热应力。副屏是为了减少主屏隔振底盘缝的漏声。迷路消声构造减少伸缩缝的漏声。为了抗风，主习必须锚固，并且屏体自身应有良好的结构。     

排污权交易与我国环境法治进程

排污许可证制度、排污收费制度和排污权交易制度对于环境污染的治理能够发挥出无可替代的作用.作为三种不同性质的治污手段,其运行机制有本质上的区别,也使得其实施的过程以及效用存在质的差别.本文通过对此三种治污手段的比较,意在揭示政府管制与市场调节两种不同的治理机制对我国环境法治进程的影响,并初步探讨了我国环境法治进程的路径选择.     

Effect and mechanism of coking residual ammonia water treating by flue gas

ＩｎｔｒｏｄｕｃｔｉｏｎＣｏｋｉｎｇｗａｓｔｅｗａｔｅｒ,ｅｓｐｅｃｉａｌｌｙｔｈｅｃｏｋｉｎｇｒｅｓｉｄｕａｌａｍｍｏｎｉａｗａｔｅｒ(ａｈｕｇｅｖｏｌｕｍｅａｎｄｈｅａｖｙｐｏｌｌｕｔｅｄｗａｓｔｅｗａｔｅｒｉｎｃｏｋｉｎｇ)ｉｓａｈｉｇｈｃｏｎｃｅｎｔｒａｔｉｏｎｏｒｇａｎｉｃｉｎｄｕｓｔｒｙｗａｓｔｅｗａｔｅｒｏｆｄｉｆｆｉｃｕｌｔｆｏｒｔｈｅｂｉｏｃｈｅｍｉｓｔｒｙｄｅｇｒａｄａｔｉｏｎ.Ｏｆｗｈｉｃｈ,ＢＯＤ5/ＣＯＤｉｓｕｓｕａｌｌｙａｂｏｕｔ30%.Ａｔｐｒｅｓｅｎｔ,ｂｙｔｈｅｔｒｅａｔｍ…     

浅谈排污指标有偿转让

实行排污权交易，将企业经济效益同污染防治工作直接挂钩，可变企业被动防治污染为主动防治，变政府直接管理环境为间接管理，更符合社会主义市场经济运行机制。排污指标有偿使用与转让是排污权交易的核心，着重探讨了排污指标有偿使用费与有偿转让费的计算及排污指标交易中的注意事项。     

贲亭酸甲酯生产中恶臭污染分析及治理实践

实验室和工业实践中表明,活性炭吸附、硫酸碳化和高锰酸钾氧化对此类恶臭物质的处理具有一定的效果,100g活性炭对异戊烯醇的最大吸附量可达到36g,100mL98%的硫酸可处理异戊烯醇30g;在采取冷凝回收、活性炭吸附和硫酸碳化工程措施后,臭气的排放浓度低于100(无量纲),厂界臭气浓度低于20,可稳定地实现达标排放。     

Infiltration and redistribution of LNAPL into unsaturated layered porous media

Enhanced understanding of light non-aqueous phase liquid (LNAPL) infiltration into heterogeneous porous media is important for the effective design of remediation strategies. We used a 2-D experimental facility that allows for visual observation of LNAPL contours in order to study LNAPL redistribution in a layered porous medium. The layers are situated in the unsaturated zone near the watertable and they are inclined to be able to observe the effect of discontinuities in capillary forces and relative permeabilities. Two experiments were performed. The first experiment consisted of LNAPL infiltration into a fine sand matrix with a coarse sand layer, and the second experiment consisted of a coarse sand matrix and a fine sand layer. The numerical multi-phase flow model STOMP was validated with regard to the experimental results. This model is able to adequately reproduce the experimental LNAPL contours. Numerical sensitivity analysis was also performed. The capillarity contrast between sands was found to be the main controlling factor determining the final LNAPL distribution.     

Geochemical techniques on contaminated sediments-river basin view

The big flood in the upper Elbe River catchment area has revealed a wide spectrum of problems with contaminated sediments. So far, an effective strategy for managing contaminated sediments on a river basin scale is still missing and it seems that not much has been learned from the lessons received during the last decade. In the following overview, special emphasis is given to the utilization of geochemically-based techniques for sediment remediation, which can be applied in different parts of a river basin. The examples presented here are mostly from the Elbe River catchment area. In general, new technical problem solutions need a set of practical process knowledge that uses a wide range of simulation techniques, as well as models in different spatial and temporal scales. The evaluation of recent flood events clearly demonstrates the importance of chemical expertise in the decision-making process for the sustainable development in river basins.     

强电离放电产生臭氧等离子体过程及其应用研究

电子从强电场 (>30 0Td)放电过程中取得的平均能量大于 8.4eV ;促使氧分子分解、分解电离成高浓度的氧原子、氧原子离子 ,从而产生高浓度 (>2 0 0 g/Nm3 )臭氧 ,实现了用电离放电电场的物理量控制臭氧产生浓度、产生效率及臭氧分解速率 ,并实现臭氧产生装置小型化。极大地拓宽了臭氧在环境工程领域上的应用     

高压脉冲电晕法治理有机废气实验研究

介绍了采用高压脉冲电晕法去除乙醇,甲醛,二氧甲灶模拟废气的情况。实验在线一板式电晕反应器内进行,考察了电压峰值,气体浓度,停留时间和含湿量等不同因素对去除率的影响。实验结果表明能达到较好的去除效果。     

染料工业废水零排放的可行性研究

染料废水是目前难治理的工业废水之一.通过对某染料厂还原蓝生产废水的研究,提出了利用残余硫酸制取硫酸亚铁水处理剂,滤渣在一般锅炉内焚烧的综合利用和治理工艺.从而探索和实践了少污染,回收利用等综合治理污染的工艺,力求尝试一种"零排放"和"绿色化学"的化工生产过程.