Bioaugmentation is commonly used in municipal wastewater treatment to restart activated sludge bioreactors. Most cultures available contain microbial cultures, already containing all necessary microorganisms ("B. licheniformis", "B. thuringiensis", "P. polymyxa", "B. stearothermophilus", "Penicillium" sp., "Aspergillus" sp., "Flavobacterium", "Arthrobacter", "Pseudomonas", "Streptomyces", "Saccharomyces", etc.). Activated sludge systems are generally based on microorganisms like bacteria, protozoa, nematodes, rotifers, and fungi, which are capable of degrading biodegradable organic matter. There are many positive outcomes from the use of bioaugmentation, such as the improvement in efficiency and speed of the process of breaking down substances and the reduction of toxic particles in an area.