The application of water, or water mixed with suppressants, to combat wildfires is one of the most common firefighting methods but is rarely studied for smouldering peat wildfire, which is the largest type of fire worldwide in term of fuel consumption. We performed experiments by spraying suppressant to the top of a burning peat sample inside a reactor. A plant-based wetting agent suppressant was mixed with water at three concentrations: 0% (pure water), 1% (low concentration), and 5% (high concentration), and delivered with varying flowrates. The results showed that suppression time decreased non-linearly with flow rate. The average suppression time for the low-concentration solution was 39% lower than with just water, while the high-concentration solution reduced suppression time by 26%. The volume of fluid that contributes to the suppression of peat in our experiments is fairly constant at 5.7 ± 2.1 L kg⁻¹ peat despite changes in flow rate and suppressant concentration. This constant volume suggests that suppression time is the duration needed to flood the peat layer and that the suppressant acts thermally and not chemically. The results provide a better understanding of the suppression mechanism of peat fires and can improve firefighting and mitigation strategies.

将水或与抑制剂混合的水用于扑灭野火是最常见的灭火方法之一，但对于闷烧的泥炭野火却很少进行研究，就燃料消耗而言，这是世界上最大的火种。我们通过在反应堆内部的燃烧的泥炭样品顶部喷洒抑制剂来进行实验。将植物润湿剂抑制剂与三种浓度的水混合：0％（纯水），1％（低浓度）和5％（高浓度），并以不同的流量输送。结果表明，抑制时间随流速呈非线性下降。与仅用水相比，低浓度溶液的平均抑制时间减少了39％，而高浓度溶液的抑制时间减少了26％。^-1泥炭，尽管流速和抑制剂浓度有所变化。这个恒定的体积表明抑制时间是充满泥炭层所需的持续时间，并且抑制剂具有热作用而不是化学作用。结果提供了对泥炭火灾抑制机制的更好理解，并可以改善消防和缓解策略。