The expired fire-fighting foam extinguishing agent needs to be harmlessly degraded. For example, the expired foam recovered by Shandong Jiuze Fire Company will be treated as follows:

1. Pull the expired foam extinguishing agent back to the factory and pour it into the degradation tank.

2. Add the degradation agent into the expired fire fighting foam in proportion. If it is a foam that has expired for a long time, it may turn black and stink. You also need to add disinfectant, stir and mix, and then leave it for 48 hours.

3. Pumping out the upper wastewater naturally precipitated by the expired foam liquid, which is harmless and can be safely discharged.

4. Collect the waste foam extinguishing agent in the degradation pool, digest it and send it to the landfill for burial.

5. Fire fighting foam liquid recovery and harmless degradation areas are Beijing, Tianjin, Shanghai, Chongqing, Shijiazhuang, Hebei, Zhengzhou, Henan, Wuhan, Hubei, Changsha, Jiangsu, Nanjing, Nanchang, Jiangxi, Shenyang, Liaoning, Changchun, Heilongjiang, Harbin, xi, Shaanxi, Taiyuan, Shandong, Jinan, Chengdu, Sichuan, Xining, and so on.