照相馆各地都有,而照相馆用来冲洗胶卷的废水,含有大量白银。浙江省仙居县有5000多名收“废”大军,辗转全国各地回收“废液、废渣、废片”提炼白银。97年回收白银200多吨,人均收入2～3万元,高的达10万元。提取方法很简单,以前主要用电解法和化学法,但回收率 There are photo studios all over the world, and the photo studio used to wash the film waste water contains a lot of silver. In Xianju County, Zhejiang Province, there are more than 5,000 troops receiving “waste”, and recycling “waste liquid, waste residue, and waste film” around the country to extract silver. In 1997, more than 200 tons of silver was recovered, with a per capita income of 20,000 to 30,000 yuan and a high of 100,000 yuan. The extraction method is very simple, mainly using electrolytic and chemical methods before, but the recovery rate