废水中可溶性硫化物的形态分析

运用毛细管区带电泳间接紫外光度法，成功地分离了水中几何可溶性硫化物，并用于废水分析取得满意效果。     

从实用结果评估污水除油用浮选机的分选能力

为从生产实际使用结果比较不同浮选机的分选能力 ,提出以小型浮选试验研究得到的除油结果做为比较时的一个基础数据 ,同时考虑处理量、浮选工艺条件、水的温度等因素的影响 ,还应注意其抗冲击能力。在讨论时应注意所用含油量分析方法     

印染废水的治理研究

印染废水是一种有机物含量高、色度深、生化性差、难降解的工业生产废水。对印染废水处理技术的研究现状进行了介绍．讨论了各自的作用机理及其在印染废水处理中的应用。为工程设计和生产工艺提出了一些有益的建议。在此基础上对印染废水处理的发展趋势做了分析和展望。     

HL型旋流器的工业试验研究

论述了HL型旋流器的工业试验过程。采用HL型旋流器进行工业试验，尽管测试效果与实验室测试效果相比有很大差距，但它能取代石化行业目前采用的“一隔二浮”流程中的大部分装置，具有良好的工业使用价值。     

立交桥噪声等值线评价方法及软件开发

提出了应用极坐标网格法对立交桥周围噪声环境进行预测评价计算，并绘制立交桥噪声等声级线图的方法，同时介绍了在ＦＯＸＰＲＯ数据库环境下开发的“立交桥噪声等值线计算软件”及其设计思想。     

Improvement in the feeding method to an inclined conveyor designed for the recycling of foundry sand

 The goal of the inclined conveyor method for particle shape separation is to process a large amount of feed material for recycling technology. The high feed rate has been achieved because the movement of particles is faster than for other previously introduced equipment. The separation performance of the apparatus was tested with foundry sand. A large amount of sand was treated, and various processing capacities were studied experimentally. The feed method was improved from point to line with wide troughs to process the higher feed rate. We succeeded in attaining a feed rate of 1.49 × 10⁻³ kg/s with a 0.3-m trough. The space filling, which was an important factor in deciding the capacity of the feed rate, was defined. This method is useful for any kind of line-feed method. Received: March 25, 2002 / Accepted: August 5, 2002     

Selective flotation separation of plastics by chemical conditioning with methyl cellulose

The floatability of seven plastics (POM, PVC, PET, PMMA, PC, PS and ABS) in the presence of methyl cellulose (MC) and separation of plastics mixtures were investigated in this paper. It was found that the seven plastics can be separated into three groups by using the wetting agent MC. Group one includes POM and PVC. They are depressed at very low MC concentrations. Group two, including PET, PMMA and PC, has an intermediate floatability. Group three (ABS and PS) has a high floatability. They are almost not depressed within the given MC concentration range. In order to understand the mechanism of selective flotation of plastics and the chemical conditioning process, surface chemical factors, such as wettability of plastics and surface tension of flotation medium, and gravity factors, such as particle density and shape, were studied. It was found that the depressing effect of MC on plastics is ascribed mainly to its adsorption on the plastics surfaces. The MC molecules absorbed on plastics expose some of their polar groups oriented towards the aqueous phase, hence making the plastics surfaces hydrophilic. In addition, flotation selectivity for the plastics is dominated not only by wettability of plastics, but also by particle size, density and shape.     

基于油水分离的餐饮废水破乳化技术研究

餐饮废水中乳化油的分离处理一直是一个技术难题,文章分别采用物理机械方法和物理化学方法对餐饮废水进行了破乳化研究。通过对比试验结果和分析破乳机理,总结出各方法不同的破乳特点。结果表明,温度越高分离效果越好,但在实际应用中,保持在50～60℃即可。低功率的超声波可以促进破乳效果,但超过30W,又会使溶液发生乳化反应。小分子醇类的加量越多,破乳化作用越强;醇类单链越长,分离效果越好。加入无机盐,在一定程度上可以加快破乳化速度,但效果并不明显。