Pond ash is one of the main residual wastes from coal combustion. In coal power plants, the pond ash is usually mixed with seawater and stored as stockpiles, commonly known as ash dams. Once the ash dam ‘dries out’, the particles scatter with the wind, giving rise to various health issues. This research study aims to identify effective strategies for remediating the ash dam sites of coal power plants. Initially, the researchers conducted a literature review and expert interviews to identify strategies for remediation. The four alternatives are using (a) a sprinkler system, (b) Nu-Rock technology, (c) silicone extraction technology and (d) tree-planting technology. To validate the expert interview findings, this research quantified all the costs and benefits of the Port Augusta power plant in Australia as a case study. Silicone extraction technology and Nu-Rock technology create up to AU$20 million worth (AU$1 = US$0.718) of jobs within the area. Based on the analysis, it is identified that the Nu-Rock technology, silicone extraction process and plant regeneration alternatives are effective in ash dam remediation. The sprinkler system is a quick and temporary fix to ash dams until a permanent solution is introduced.

中文翻译：

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燃煤电厂灰坝站点的有效补救策略

池塘灰是煤燃烧的主要残余废物之一。在燃煤发电厂中，池塘灰通常与海水混合并以库存的形式储存，通常称为灰坝。灰坝“干'”后，颗粒随风飞散，引发各种健康问题。这项研究旨在确定补救燃煤电厂灰坝站点的有效策略。最初，研究人员进行了文献综述和专家访谈，以确定补救策略。四种替代方法是使用（a）洒水系统，（b）Nu-Rock技术，（c）硅酮提取技术和（d）植树技术。为了验证专家访谈的结果，本研究以案例研究的形式量化了澳大利亚奥古斯塔港发电厂的所有成本和收益。硅酮提取技术和Nu-Rock技术在该地区创造了高达2,000万澳元（1澳元= 0.718美元）的就业机会。根据分析，可以确定，Nu-Rock技术，有机硅提取工艺和植物再生替代品对灰坝的修复是有效的。喷水灭火系统是对灰坝的快速和临时性修复，直到采用了永久性解决方案为止。