An assessment of the UV/nFe /H O system for the removal of refractory organics in the effluent produced by the biological treatment of landfill leachate.

The removal efficiency and mechanism of the ultraviolet/nanoscale Fe /H O (UV/nFe /H O ) system for refractory organics in membrane bioreactor effluent were investigated. The most effective removal of organics was achieved at initial pH = 3.0, H O dosage = 50 mM, nFe dosage = 1.

Combination of coagulation, Fe/HO and ultra-high lime aluminium processes for the treatment of residual pollutants in biologically-treated landfill leachate.

Refractory substances (humus) and salts (chloride (Cl) and sulphate (SO) ions) remain in the biotreated landfill leachate treatment, and it is necessary to carry out further treatments by a suitable method before discharge. In this study, the effect and operational mechanism of a combination of the coagulation Fe/HO and ultra-high lime aluminium (UHLA) processes for the treatment of refractory organic substances and salts in the leachate effluent of a semi-aerobic aged refuse biofilter (SAARB) were investigated. The results showed that polyferric sulphate is a relatively efficient coagulant comparing to FeCl, Al(SO), and polyaluminium chloride.

Leachate Pretreatment before Pipe Transportation: Reduction of Leachate Clogging Potential and Upgrading of Landfill Gas.

Leachate and landfill gas are the main contaminants produced by modern sanitary landfills. The leachate easily leads to clogging in the leachate transportation pipe, and the landfill gas can be used as renewable energy after the removal of CO. The study aims to investigate the removal of the major scale forming ion of Ca in leachate using raw landfill gas before pipe transportation.