Perbandingan Konsentrasi Sianida (Cn-) dan Ph pada Inlet dan Outlet dari Instalasi Pengolahan Air Limbah (Ipal) Industri Pengolahan Tepung Tapioka

Abstract

Have to determine cyanide concentration (CN-) and pH value at waste water treatment plant tapioca flour processing industry. pH value determine using pH paper whereas concentration of cyanide determine by spectroquant nova 60. pH value from WWTP inlet PT.Sinar Intan Tapioka is 4, at PT. Florindo Makmur is 5, at PT. Sari Tani Sumatra is 5, at PT. Deli Sari Murni is 5, while pH value WWTP outlet PT. Sinar Intan Tapioka is 8, at PT. Florindo Makmur is 8, at PT. Sari Tani Sumatra is 7, at PT. Deli Sari Murni is 4. Whereas concentration of cyanide (CN-) from WWTP inlet PT. Sinar Intan Tapioka is 0,432 mg/L, at PT. Florindo Makmur is 0,622 mg/L,at PT. Sari Tani Sumatra is 0,552 mg/L, at PT. Deli Sari murni is 0,444 mg/L. While concentration of cyanide (CN-) from WWTP outlet PT.Sinar Intan Tapioka is 0,136 mg/L, at PT.Florindo Makmur is 0,119 mg/L, at PT.Sari Tani Sumatra is 0,061 mg/L, at PT. Deli Sari Murni is 0,444 mg/L. pH value and cyanide concentration of the sample at PT. Sinar Intan Tapioka, PT. Florindo Makmur, PT. Sinar Intan Tapioka still meet the requirements quality standart of waste water tapioca flour processing industry according to KEP-51/MENLH/10/1995 appendix B VIII, while pH value and cyanide concentration from waste water at PT. Deli Sari Murni exceeds quality standart of waste water tapioca flour according KEP-51/MENLH/10/1995 appendix B VIII that is 0,3 mg/L.