Two air injection styles (periodic injection and continuous injection)

single well or multiple wells

and biodegradation were simulated during bioventing (BV) process for multiple contaminants system. The effect of operating conditions on remediation efficiency was investigated.The results showed that similar removal efficiencies were obtained by using periodic air injection and continuous air injection. However

operating cost was reduced when periodic injection was chosen. In the case of small contamination zone

single well was enough to remove contaminants. When the contamination zone was larger than the effective radius of a single well

multiple wells should be used. In the earlier stage of the remediation process

a larger air flow rate was recommended to remove volatile organic contaminants.In the later stage of the remediation process

a smaller air flow rate was suitable for stimulating biodegradation in order to remove residual organic contaminants in soil.