Production of xenobiotic degrader for potential application in bioaugmentation.
Continuous-flow chemostats were operated at different mean-cell-residence-times (θc) and influent concentrations of a xenobiotic (2,4-D) and biogenic substrates. Steady state chemostat biomasses' performances in 2,4-D degradation were analyzed with a mathematical model to determine the quantities of degrader the biomasses contained. The qualification for microbial cells to become degraders is a high grade of degradation kinetics. This qualification uniformly applies to all biomasses. The quantities of degraders vary inversely with the chemostats'θc. Biogenic substrates increase degrader yield such that a high biogenic and a high xenobiotic influent optimize degrader mass output. Economics evaluation performed around the optima finds the influent containing 5-25% 2,4-D carbon (TOC) in approximately 900 mg/l biogenic TOC, and the θc of 2-5d, are suitable operating conditions for a degrader producing bioreactor that may serve as a selector of biomass for bioaugmentation purposes.
Department of Environmental Engineering, DaYeh University, No. 168, University Road, Dacun, Changhua 51591, Taiwan, ROC. chong@mail.dyu.edu.tw
Nyuk-Min
NM
Chong
Jung-Cheng
JC
Huang
D018407:Bacterial Physiological Phenomena; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D003198:Computer Simulation; D004785:Environmental Pollutants / Q000378:metabolism*; D005240:Feasibility Studies; D008954:Models, Biological; D012722:Sewage / Q000382:microbiology*; D015262:Xenobiotics / Q000378:metabolism*
D004785:Environmental Pollutants; D012722:Sewage; D015262:Xenobiotics