Common Treatment Train for Nonhalogenated VOCs
A treatment train is the combination of different treatment technologies. A system diagram of a common treatment train for nonhalogenated VOCs is illustrated below. A soil vapor extraction system is used to pull VOC vapor from the contaminated soil. An air sparging system delivers air below the water table to enhance bioremediation. After passing through a liquid/vapor separator, the VOC contaminated water and gas are pumped to a liquid phase granulated activated carbon (GAC) adsorption system. The GAC system removes VOCs in the water. The effluent is either discharged or pumped back as fluid recycling. Meanwhile, VOCs in the gas stream are completely destroyed through catalytic oxidation. Carbon dioxide and water vapor are discharged to the atmosphere as the final products of oxidation.