The leachate will have ...

The leachate will have numerous substances depending on the source of the leachate, municipal landfill or industrial landfill. Each of these will have BOD/COD/NH3/VOCs/TSS and concentration data. An oxygen demand profile can be developed on the total oxygen needed and also if there are O2 scavengers. The health of the biofloc in the leachate pond/lagoon will be critical to determine if they can remain viable. Inasmuch as most lagoons systems are pass through (hydraulic retention time) systems, floc will need to be conserved our recycled or supplemented. What microorganisms stay viable in the lagoon will be those that can tolerate the concentration of the toxic components entering the lagoon. If these can be stripped off before entering the healthier the lagoon system for treating leachate. This is why bench scale testing first is important to determine which CFUs can survive and provide the basis for innoculation of the leachate lagoon with these cultures. If the leachate does not have a good F/M ratio then nutrients might need to be added to keep the CFUs viable and productive in the reductions. The best leachate lagoons are fucultative or dual zone, aerobic zone in the epilimnion and anoxic zone into hypolimnion this will allow different floc to develop in each zone. A good initial reference is "lagoonsonline" that can take you step by step into designing a good leachate treatment system.