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首页> 外文会议>16th Annual technical conference and exposition of the American Filtration and Separations Society >NEW LIQUID/SOLID SEPARATION TECHNOLOGIES ENHANCEWASTEWATER TREATMENT PROGRAM
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NEW LIQUID/SOLID SEPARATION TECHNOLOGIES ENHANCEWASTEWATER TREATMENT PROGRAM

机译：新的液体/固体分离技术增强了废水处理程序

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摘要

Traditional technologies (clarification followed by sand filtration or microfiltration) haverntheir limitations in removing fine and fragile pollutant precipitates from wastewater.rnSand filters are less expensive than microfilters but cannot remove small particles thatrncan result in effluent limit violations. Microfilters when operated properly remove thernparticles but have relatively high capital and operating costs as well as fouling problems.rnHowever, there are several new technologies currently being developed (field separationrntechnologies) which may overcome the limitations associated with the traditionalrntechnologies.rnField separation technologies use field forces rather than mechanical forces to removernmetal precipitates from wastewater. The field separation technologies investigated forrnthis paper were magnetic separation using magnetite seed material and enhanced flotationrnusing waste Styrofoam seed material.rnBoth of these field separation technologies use seed material that is easy to remove fromrnwastewater. The hard to remove metal particles are attached to the seed material withrnflocculating polymers and the combined particles (seed and metal precipitate) arernremoved from the wastewater by simple methods.rnThis paper investigates the advantages and disadvantages of these traditional technologiesrnand compares them with new field separation technologies. Factors such as, costrn(operating and capital), surface overflow rates (SOR), and footprint size, are investigated.rnEffective field separation technologies using seeding materials make it possible to costrneffectively use two-step chemical precipitation to remove heavy metals from wastewater.This approach produces less sludge, lowers chemical usage, makes it possible to recoverrnheavy metals, and lowers the amount of discharged heavy metals into the environment.
机译：传统技术（先进行澄清，然后进行沙滤或微滤）限制了从废水中去除细小和易碎的污染物沉淀物的范围。沙滤器比微滤器便宜，但不能去除可能导致违反排放限值的小颗粒。微型过滤器在正常运行时会去除颗粒物，但具有相对较高的投资和运营成本以及结垢问题。然而，目前正在开发几种新技术（现场分离技术），这些新技术可能会克服与传统技术相关的局限性。而不是机械力从废水中去除金属沉淀物。本文研究的田间分离技术是利用磁铁矿种子材料进行磁选，并利用泡沫聚苯乙烯泡沫材料进行浮选。这两种田间分离技术都使用易于从废水中去除的种子材料。通过絮凝聚合物将难以去除的金属颗粒附着到种子材料上，并通过简单的方法将结合的颗粒（种子和金属沉淀物）从废水中去除。本文研究了这些传统技术的优缺点，并与新的现场分离技术进行了比较。 。研究了成本（运营和资本），表面溢流率（SOR）和占地面积大小等因素。使用种子材料的有效田间分离技术可以经济有效地使用两步化学沉淀法从废水中去除重金属。这种方法可减少污泥，降低化学用量，回收重金属，并减少排放到环境中的重金属量。

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