Research On Treatment Of Landfill Leachate By Upflow Anaerobic Sludge Blanket

Landfill disposal is a widely used technique for solid waste management. The leachate produced, owing to moisture release and rain and snow infiltration, can cause environmental hazards if it is not properly collected, treated, and disposed. The organic and inorganic components, which have been given priority to be controlled by EPA and Chinese government, will pollute underground water and other public waters. A study was carried out to assess the efficiencies of Upflow Anaerobic Sludge Blanket (UASB) to treat leachate from a landfill. The main objective of the study was to assess the effect on a pilot scale reactor, while studying the behavior of the system at different organic and hydraulic loading rates and effects of Particle Activated Carbon (PAC) on the biomass activity. The results show, on the 82nd day, granular sludges were observed with a organic loading rate of 2.75 kg COD/m3?d and COD removal efficiency of 45%. The highest organic loading rate applied was 5 kg COD/m3?d at 35°C with hydraulic loading rate between 0.5~0.7 m3/(m2·h) and COD removal efficiencies between 45%~55%. The added components, FeCl2 1.5 mg/L,NiCl2 0.4 mg/L,CoCl2 0.2 mg/L,served as an activatant and improved the ability of the UASB reactor. Besides, PACs were added in another reactor. Throught comparative studies, positive effects of PACs on the system were found. Although the COD removal efficiency had not been improved greatly, the start-up period was shorten 25% and the highest organic loading rate increased 40% and bigger anaerobic granular sludges were observed, when PACs were added.Through this experiment research, the operational parameters and technology foundations can be offered for project design and running. In the real project, the factors should be modified according to the reality to get the best result.