Copper and zinc in sludge extract were removed by improved ferrite coprecipitation process using lime milk as neutralization reagent.
采用改进铁氧体共沉淀法，用石灰乳溶液作中和剂，从污泥浸出液中去除铜、锌。
2
The composite starch is rich in active calcium, zinc, copper, ferrite and other trace amounts, effectively improves the nutrient components of starch and is beneficial to the absorption by human body.