共查询到20条相似文献,搜索用时 484 毫秒
1.
2.
Albert J. Dijkstra 《European Journal of Lipid Science and Technology》1999,101(4):132-137
In edible oil refining, the various processes in current use lead to different by-products and/or waste products and they may also cause some form of pollution. The processes are reviewed in this paper and current or possible means of disposal of these by-products/waste products are discussed to highlight the areas requiring most attention. These areas turn out to be gum disposal when the degumming operation is carried out at a stand-alone refinery, and soapstock effluent resulting from the alkali refining process. Other waste products and pollution sources are found to be unimportant or manageable. Accordingly, a major step forward in pollution abatement in seed oil refining can be achieved by making two changes. The first one entails carrying out the degumming operation at the oil mill rather than at the refinery. This should be done in such a way that the degummed oil is amenable to physical refining. The acid refining process is recommended for this degumming step and consequently, acid refined oil with appropriate quality guarantees will then become the article of trade. The second one involves a switch from alkali refining crude or waterdegummed oil to the physical refining of acid refined oil. For this latter step, a counter-current process is recommended because of its low stripping steam requirement. Dry condensation of the distillate will further alleviate pollution problems associated with deodorization and physical refining. Finally, some processes, that may contribute to pollution control but that still require development, are mentioned. 相似文献
3.
污水污泥肥料化利用的分析与研究 总被引:4,自引:0,他引:4
随着世界工业的发展、城市人口的增加,工业废水和生活污水的排放量日益增多,导致污泥的数量迅速增加。为避免污泥产生的二次污染和利用污泥中的有效成分,污泥的处置已经成为全世界关心的问题。在分析了常见的污泥处置方式存在的各种弊端之后,提出污泥的肥料化利用发展方向,指出将稳定化、无害化处理后的污泥作为一种有机肥料使用,将成为我国一种很有应用前景的污泥处置方式。 相似文献
4.
抗生素废水处理研究进展 总被引:16,自引:2,他引:14
分析了抗生素生产废水的水质特征及污染因子,介绍了近年来国内外抗生素废水处理过程中采用的物化法、生化法及其他组合处理方法,指出了目前常用的处理方法中存在的问题。结果表明,新技术、新材料及多种技术的联合应用,能够有效防治抗生素废水污染。为该类废水的治理工艺选择提供参考。 相似文献
5.
6.
介绍了焦化污水生化处理系统的改造、开工、调试和运行情况.讨论了处理过程中的影响因素、操作管理经验以及污水处理工艺的特点和发展前景。 相似文献
7.
8.
活性炭处理含铬废水的方法 总被引:17,自引:1,他引:17
活性炭具有优良的吸队性和还原性,已广泛用于废水处理工业,阐述了活性炭处理含铬废水的基本原理,采用吸附-还原联用处理含铬废水,介绍了其工艺流程、特点及处理过程中的注意事项。实践证明,经处理的废水中六价铬含量达国家排放标准。 相似文献
9.
10.
11.
12.
T. H. MORTON 《Coloration Technology》1967,83(5):177-184
The present and estimated future use of water in England and Wales is compared with available resources. Use is overtaking easily available supply. The changes in procurement of water and disposal of effluent implied in recent legislation (setting up River Authorities and the Water Resources Board) are discussed, particularly as they are likely to affect the dyeing industry. The quality of water for use in the dyeworks is discussed in terms of dissolved and suspended impurities; and the methods available for the control of the effects on the dyeing process of ionic solutes, residual hardness, heavy metals, and bicarbonate are summarised. The problems of disposal of dyeworks' effluent are considered in so far as they impinge on national water-management policy. Savings in the cost of effluent treatment may be possible in an integrated textile industry where all processes, including disposal, are considered together in planning. Instances of process modification to avoid effluent-disposal problems are cited. 相似文献
13.
焦化废水零排放的可能性探讨 总被引:1,自引:0,他引:1
焦化废水为了达标排放,处理过程中加入了稀释水,如果不加稀释水,可以满足熄焦等用水的需要,而处理水量大大降低,为焦化废水的零排放创造了有利条件。 相似文献
14.
化学清洗废液是一种高难度处理的废水.主要介绍专门处理化学清洗废液的 Q X- H85 型废液处理装置的性能、特点、流程及调试结果 相似文献
15.
介绍大峪口大型矿肥结合工程污水组成及其处理方法。经过小、中型实验,先经中和泸塔预处理氟化铝污水,然后与其它污水混合后进行二段中和、二段沉淀处理,该工艺可行,并实现了工业化。处理后污水pH、氟含量均符合国家排放标准。 相似文献
16.
17.
18.
纳米材料在环境保护方面的最新应用进展 总被引:9,自引:0,他引:9
综述了近年来纳米材料在环境保护中的应用情况,重点介绍了纳米技术在大气污染、污水处理等环保方面的应用情况。在噪声污染控制,固体废弃物处理,环境监测等方面的应用情况也做了简要的介绍。 相似文献
19.