pH, dissolved oxygen, and adsorption effects on metal removal in anaerobic bioreactors

摘要: Anaerobic bioreactors were used to test the effect of pH influent on removal efficiency heavy metals from acid-rock drainage. Two studies a near-neutral-pH, metal-laden examine metal and hydraulic residence time requirements reactors. Another study more typical low-pH mine drainage influent. Experiments also done (i) effects oxygen content feed water (ii) adsorptive capacity reactor organic substrate. Analysis results indicates that bacterial sulfate reduction may be zero-order kinetic reaction relative concentrations in experiments, factor controls mass anaerobic treatment systems. The sorptive capacities substrate experiments had not been exhausted during as indicated by loading rates exceeding production sulfide. Microbial was less reactors receiving with short times. Sulfate-reducing bacteria have inhibited high flows water. Dissolved waters little capacity.