巩县某化工厂为生产铬酸酐的社办企业,该厂于1977年投产,年产铬酸酐800t、重铬酸钠300t,生产设备简陋,生产过程中,产生大量合六价铬的三废,未经处理即排放,每年排出废水1095t、废渣3650t、废气73万m~3,使厂周围环境严重污染。为贯彻预防为主方针,为防病灭病提供依据, Gong County, a chemical plant for the production of chromic anhydride community-run enterprises, the plant put into operation in 1977, with an annual output of 800t chromic anhydride, sodium bichromate 300t, simple production equipment, the production process, resulting in a large amount of three hexavalent chromium waste, Untreated that is discharged, each year 1095t wastewater discharge, waste 3650t, waste gas 730,000 m ~ 3, so that the surrounding plant serious pollution. To implement the principle of prevention, to provide the basis for prevention and treatment of disease,