Flue Gas Desulfurization Wastewater Composition and Implications for Regulatory and Treatment Train Design
Flue Gas Desulfurization Wastewater Composition and Implications for Regulatory and Treatment Train Design
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DOI：
10.1021/acs.est.9b07433
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发表时间：
2020-04-07
影响因子：
11.4
通讯作者：
Mauter, Meagan S.
中科院分区：
文献类型：
--
作者：
Gingerich, Daniel B.;Mauter, Meagan S.
美国环境保护署目前正在修订其关于烟气脱硫（FGD）废水中微量元素排放的法规。在这项工作中，我们扩展了燃煤电厂（CFPPs）的微量元素行为的预测模型，以估计在工厂水平的FGD废水的微量元素浓度。我们表明，在FGD废水中的微量元素浓度的变化可以跨越几个数量级，是煤阶和安装的空气污染控制装置的函数。这一结论表明，中值电厂的烟气脱硫废水处理的效益和成本将很难描述现有CFPP全系列的实际效益和成本。我们的模型可以用来确定不同的“类”的CFPP为未来的监管和技术开发工作，并评估建议的处理技术的鲁棒性，在大的厂内变异。该模型还可以阐明新的合规途径，利用经验和机制之间的关系，煤浓度，微量元素的分区，和FGD废水成分。
The U.S. Environmental Protection Agency is currently revising its regulations on trace element discharges from flue gas desulfurization (FGD) wastewater. In this work, we expand a predictive model of trace element behavior at coal-fired power plants (CFPPs) to estimate the trace element concentration of FGD wastewater at the plant level. We demonstrate that variation in trace element concentrations in FGD wastewater can span several orders of magnitude and is a function of both coal rank and installed air pollution control devices. This conclusion suggests that the benefits and costs of FGD wastewater treatment for the median plant will poorly describe the actual benefits and costs over the full range of existing CFPPs. Our model can be used to identify different "classes" of CFPPs for future regulatory and technology development efforts and to evaluate the robustness of proposed treatment technologies in light of large intraplant variability. The model can also elucidate new compliance pathways that exploit empirical and mechanistic relationships between coal concentration, trace element partitioning, and FGD wastewater composition.