Pyrometallurgy is the traditional waste lead-acid battery treatment for lead recycling in the world. Due to the serious air pollution, and hazardous materials in this traditional treatment. We develop electro hydrometallurgy technology to recycle lead in our research. This project is first year of alkaline leaching process and electrolytic lead pilot plant experiment. In the next year, laboratory experiments have some results. Electricity costs are 2.6 Taiwan dollars per 1 kilogram of lead. In three lead recycling plants, more than 100 tons of 45 wt. % NaOH is used to neutralize the acid and air pollution treatment every month. There were no additional costs for alkaline leaching, and it would be neutralizer after use. It enlarged the main experiment 250 times in this project of pilot plant. 100 liter reactor was designed to improved hydrometallurgical processing technology of lead. The lead in the solution after alkaline leaching was recycled with electrolysis equipment and compared operating costs to Pyrometallurgy. It was expected to reduce almost 60% hazardous materials and 80% SOx emission. The operating costs of treatment in hydrometallurgy technology for 10 tons of lead paste per month are estimated. The investment recovery period of lead paste treatment is about 22.5 months. This technology will be the high value of investment and development.

wasted lead battery , lead paste, hydrometallurgy, lead recovery