WATER TREATMENT INSTALLATION BASED CHROME CONTENT ANALYSIS IN INDONESIAN LEATHER TANNING INDUSTRYROSAD MA’ALI EL HADI, IKA ARUM PUSPITA, WAWAN TRIPIAWAN AND ANTON ABDULBASAH KAMIL
Cleaner production programs have become a requirement for a leather tanning industry, including the wastewater treatment installation (WTI) of leather tanning industry, so that the qualified WTI procurement needs to be developed since liquid waste from the tanning industry process is quite large and harmful to environment. The samples of 330 (three hundred thirty) tanneries from Garut, Indonesia, that need to be considered on the issue of wastewater treatment installation so that the environment is maintained. The availability of chrome waste of 1300 ppm resulted from the leather tanning industry process that has been dumped into the environment caused pollution of the rivers, the agricultural area, the well and the community pool around tannery industry center of In order not to pollute the environment, the wastewater of tannery industry must first perform coagulation process, and the supernatant of coagulation process results is then filtered and normalized of pH. The chrome content and pH of the liquid waste to be dumped into the environment shall comply with the quality standard in accordance with the decree of the State Minister of Population and Environment of the Republic of Indonesia Number: KEP-03/MENKLH/ II/1991 February 1, 1991 where the chrome content dumped into the environment shall <= 2 ppm, with normal pH. This is a result of innovation program for the community as a real step for the implementation of pollution-free area as well as to improve production efficiency program for small and medium industries especially leather tanning industry since the industry was originally able to donate considerable foreign exchange for the country. The dregs of the coagulation process are then recrystallized and filtered until producing 11% of chromium sulfate. Optimally recycled chrome sulfate is used on chrome process with 100% composition using recycled chrome sulfate. As evidenced by the results of leather testing that meets the requirements, 6 sub-variables are in rank 1, and 1 sub variable is in rank 4. The total of 7 variables from 21 variables tested, the results of the test approached the tannery result using chrome sulfate (Chromosal-B).