Hydraulic retention time
Bioreactor
Microbial population biology
Acid mine drainage
Sulfate-reducing bacteria
Biodegradation
Microorganism
Chemistry
Anaerobic exercise
Relative species abundance
Environmental chemistry
Sulfate
Pulp and paper industry
Biology
Abundance (ecology)
Bacteria
Wastewater
Environmental engineering
Environmental science
Botany
Ecology
Physiology
Genetics
Organic chemistry
Engineering
