دراسة احصائية لبعض العوامل الموثرة على ازالة املاح الكروم في فضلات الصناعات الدباغية

Statically study for effect of some coefficients on chromium removal in leather waste

Leather wastewater considered the more dangerous industrial waste because of its toxic contain as sulphate ,chromium. Chromium removed by lime settling .which depended on many coefficients as pH value, rapid and slow mixing rate . rapid and slow mixing time , settling time.Study focuses on founding statically correlation between chromium concentration and these coefficients .from (R2) value and correlation coefficient (t) in to find results depending and (F) value to find amoral differentiation of value . results appear that pH value , Rapid settling rate and settling time considered as in depended coefficient and its have a strong linear correlation with chromium remained concentration as shown at F value) 86.69(73.3, 168.29,.while slow mixing rate and rapid and slow time considered as depended coefficients and have a weak correlation with chromium remained concentration and non moral differentiation value at F ) 0.895, 0.4120.13 ) .at mixing of liming waste with leather waste at different mixing ratio note that non linear correlation between chromium remained concentration and mixing ratio and non moral correlation at F (0.07) . but a strong linear correlation mixing ratio and sludge volume and amoral correlation at F(100.09).