PENGARUH JENIS SEDIMEN WETLAND DALAM REDUKSI SULFAT PADA LIMBAH AIR ASAM TAMBANG (AAT)

Abstract

Increasing mining activities in several regions in Indonesia, began to face
problems, namely of environmental pollution. One of the mining waste that is liquid
sulfur, or acid mine water, which can lower the pH of the water and dissolves heavy
metals. Countermeasures for the chemical method is to use lime, but this is less
effective. The method is good and is environmentally friendly way by using biological
bacteria sulphate reduction bacteria (SRB) that naturally there are many in the
sediment wetland. Goal of this research is to find the type of sediment wetland most
effectively increase the pH and decrease the concentration of sulphate in acid mine
water. The sediment wetland is used mangroves, swamp, rice fields, and beaches.
Treatment bioreaktor made on the filled with sediment underneath the compost is
given further incubation for 50 days. The observation of pH and content of sulphate
based on the value of OD spektrofotometer and known pH increased to the highest
in the pH of 7.3 is in the swamp sediment treatment, while the only other treatment
until the pH 6-6,7. Increasing the pH in accordance with the decrease in the rate of
SO
4 is most sharply in the swamp sediment treatment as well as the most effective
treatment.