Abstract
Laboratory wastewater is classified as hazardous waste that is disposed of into the environment and will be very risky to environmental health. In this study, the use of a consortium of Sulphate Reducing Bacteria (SRB) was studied which was grown simply in an anaerobic column. SRB suspension was applied to the prototype anaerobic bioreactor to treat of laboratory wastewater with containing heavy metals and acidic. SRB was grown in medium of fermented compost and Postgate’s B. This research formulated that the SRB solution nursery as the optimal bioreactor activator after 15 days with the composition of the growth medium consisting of Postgate B solution (65%), Fermented compost liquid (30%) and active suspension liquid (5%), with a total population of cell colonies reaching 1.2 x 105 CFU/mL. The bioreactor requires an adjustment process for 15 days, after which the sulphate and heavy metal ion reduction process occurs significantly, and is effective with the combination of fermented compost content with the right Postgate solution, and a bioreactor with 30% compost fermented effective in reducing Pb metal ions, but for Cu and Fe metal ions were only effective after 7 days of adjustment.