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首页> 外文会议>Power Plant Air Pollutant Control "MEGA" Symposium >Pilot Scale Demonstration of an Activated Iron Process for Removing Heavy Metals and Nutrients from the FGD Wastewater
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Pilot Scale Demonstration of an Activated Iron Process for Removing Heavy Metals and Nutrients from the FGD Wastewater

机译：从烟气脱硫废水中去除重金属和营养物质的活化铁工艺的中试演示

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A novel chemical treatment technique has been invented for removing heavy metals and nutrients for hard treated FGD wastewater. This integrated treatment system employs new understandings of iron chemistry to create a highly reactive mixture of iron minerals for chemical transformation and mineralization of various heavy metals in water. A pilot test, which was demonstrated at a Southern Company's power plant, consistently reduced total mercury (Hg) from around 100 ug/L to ＜ 0.005 ug/L. Total selenium (Se), of which most is selenate, was reduced from approximately 3,000 ug/L to ＜ 10 ug/L. In addition, other heavy metals, such as arsenic (As), cadmium (Cd), chromium (Cr), nickle (Ni), lead (Pb), zinc (Zn), and copper (Cu) were all reduced to single ppb levels. Nitrate is removed by over 99% consistently. The process uses inexpensive iron based chemicals and produces a limited amount of non-hazardous solid waste. The iron powder consumption is estimated to be 300 - 400 tons for treating 500 gpm of FGD wastewater.
机译：已经发明了一种新颖的化学处理技术，用于去除硬处理的烟气脱硫废水中的重金属和养分。该综合处理系统利用对铁化学的新理解来创建铁矿物质的高反应性混合物，用于化学转化和水中各种重金属的矿化。在南方公司的一家发电厂进行的试验表明，该试验可将总汞（Hg）从约100 ug / L持续降低至＜0.005 ug / L。总硒（Se）中的大部分是硒，从大约3,000 ug / L降低到＜10 ug / L。此外，其他重金属，例如砷（As），镉（Cd），铬（Cr），镍（Ni），铅（Pb），锌（Zn）和铜（Cu）都降低到了ppb水平。硝酸盐去除率始终超过99％。该方法使用廉价的铁基化学品，并产生有限数量的无害固体废物。处理500 gpm FGD废水的铁粉消耗量估计为300-400吨。

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