28 December 2015
Posted in Center Information
Investigator: Gang Chen, FAMU/FSU
In our prior research, we have demonstrated that aerated leachate recirculation can effectively remove the organics from landfill leachate. In this research, a novel and energy- and space-saving reactor was designed and tested for further on-site treatment of landfill leachate to remove ammonium, chloride, phosphorous and heavy metals. The multifunctional reactor was designed to enhance chemical reactions and physical separation and to demonstrate the ability to achieve multifunctional landfill leachate treatment goals depending on the treatment requirements, i.e., struvite recovery, chloride removal, phosphorous removal, and iron removal. The hydraulic parameters were characterized and the reactor was optimized to achieve the desired mixing for the reaction and sedimentation for the separation. In addition, operational factors that impacted the treatment results were also investigated. In this research, the multifunctional reactor operational factors were optimized based on the treatment results and operation costs. This technology makes the on-site leachate treatment possible, which may reduce the current high costs of off-site leachate disposal by means such as transporting landfill leachate via tanker trucks to local wastewater treatment plants. This efficient, lowmaintenance and cost-saving multifunctional reactor can be recommended for the treatment of landfill leachate with variable compositions at landfill sites where current leachate disposal costs are high and space- and environmental concerns limit other longterm options.