Editing Bioaugmentation (section)

===Coke plant wastewater in China===
An example of how bioaugmentation has improved an environment, is in the [[Coke (fuel)|coke]] plant wastewater in China. [[Coal in China]] is used as a main energy source and the contaminated water contains harmful toxic contaminants like [[ammonia]], [[thiocyanate]], [[phenols]] and other organic compounds, such as mono- and [[Polycyclic compound|polycyclic]] nitrogen-containing [[aromatics]], oxygen and sulfur-containing [[heterocyclic]]s and polynuclear aromatic hydrocarbons. Previous measures to treat this problem was an aerobic-anoxic-oxic system, solvent extractions, stream stripping, and biological treatment. Bioaugmentation has been reported to remove 3-chlorobenzoate, 4-methyl benzoate, [[toluene]], [[phenol]], and [[chlorinated solvents]].

The anaerobic reactor was packed with semi-soft media, which were constructed by plastic ring and synthetic fiber string. The anoxic reactor is a completely mixed reactor while the oxic reactor is a hybrid bioreactor in which [[polyurethane]] foam carriers were added. Water from anoxic reactor, odic reactor and sedimentation tank were used and had mix-ins of different amount of old and developed microbes with .75 concentration and 28 degree Celsius. The rate of contaminant degradation depended on the amount of microbe concentration. In the enhanced microbial community indigenous microorganisms broke down the contaminants in the coke plant wastewater, such as [[pyridines]], and [[Phenols|phenolic]] compounds. When indigenous heterotrophic microorganisms were added, they converted many large molecular compounds into smaller and simpler compounds, which could be taken from more biodegradable organic compounds. This proves that bioaugmentation could be used as a tool for the removal of unwanted compounds that are not properly removed by conventional biological treatment system. When bioaugmentation is combined with A1–A2–O system for the treatment of coke plant wastewater it is very powerful.<ref>{{cite journal | author = Jianlong Wang|display-authors=et al | year = 2002 | title = Bioaugmentation as a tool to enhance the removal of refractory compound in coke plant wastewater | journal = Process Biochemistry | volume = 38 | issue = 5| pages = 777–781 | doi=10.1016/S0032-9592(02)00227-3}}</ref>