The feasibility study of using double layer PRB technology in remediation of groundwater pollution in landfill site
用双层PRB技术处理垃圾填埋场地下水污染的可行性研究

A double layer Permeable Reactive Barrier (PRB) experiment was designed to study the feasibility of in-situ remediation of groundwater contaminated by landfill leachate. Zero valent iron (ZVI) was used in the first reactor as fillings to decompose complex non-degradable and less degradable organics such as halocarbon. Then the second reactor was used to treat organic compound completely. It was an ORC reactor filled with Oxygen Release Compounds. The results indicated that the value BOD5/COD increased from 0.32 to 0.75 after through the first reactor. The removal ratio of ammonium and nitrate went up to 85% and 80%, respectively; and the maximum concentration of dissolved oxygen (DO)released by the ORC reactor went up to 7.64mg·L-1. Hence, a double layer PRB to treat leachate-polluted groundwater is feasible to application.