Abstract A 1500 L batch jet loop reactor pilot plant was designed, constructed, and evaluated for performance in the treatment of acid mine drainage (AMD) using coal fly ash with a view to optimize its operation and generate performance data. Results showed that concentration of major contaminants (sulfate, Al, Fe, Ca, Mg), and minor contaminants in the treated AMD can be significantly lowered (between one and four orders of magnitude) compared to the raw AMD. It was shown that the one-step treatment process recovered at least 66.6% (728.56 kg) of treated water depending on the degree of dewatering required for slurry pumping. The energy consumption of 2.655 kW used for pumping indicated that an oversized centrifugal pump (15 kW capacity) was used for the neutralization cycle, as only a small fraction of the pump capacity was utilized. The treated water met the target water quality range (TWQR) limit for agricultural irrigation in South Africa. The analysis of the solid residue shows its suitability for backfilling of mine voids or for making geopolymer such that AMD treatment with fly ash results in a zero discharge process. The treatment process offers a cradle-to-cradle solution to acid mine drainage and coal fly ash.

中文翻译：

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在喷射环流反应器中试装置中用粉煤灰处理酸性矿山排水

摘要 为了优化其运行并生成性能数据，设计、建造了 1500 L 间歇喷射环流反应器中试装置并评估其在使用粉煤灰处理酸性矿山排水 (AMD) 中的性能。结果表明，与原始 AMD 相比，处理过的 AMD 中主要污染物（硫酸盐、Al、Fe、Ca、Mg）和次要污染物的浓度可以显着降低（在 1 到 4 个数量级之间）。结果表明，根据泥浆泵送所需的脱水程度，一步处理过程至少可以回收 66.6%（728.56 千克）的处理水。用于泵送的 2.655 kW 能耗表明中和循环使用了超大离心泵（15 kW 容量），因为仅利用了泵容量的一小部分。处理后的水符合南非农业灌溉的目标水质范围 (TWQR) 限制。固体残渣的分析表明其适用于回填矿洞或制造地质聚合物，以便用飞灰进行 AMD 处理可实现零排放过程。该处理工艺为酸性矿山排水和粉煤灰提供了一种从摇篮到摇篮的解决方案。