In the anaerobic period,technological conditions are controlled by the means of leachate recirculation. The main experimental results are: pH,R1 rises to 6.7~7.8 in 6 weeks,and R2 is under 6.8 in 17 weeks;
The study also indicated that the reaction in the reactor could be described by the equation dC/dt=-akC,and the method could be used as the pretreatment progress of landfill leachate.
Landfill leachate is very difficult to treat with characteristics of high concentration of organic substance,NH3-N and multi-composition of pollutants.
Landfill leachate was treated by UV/Fe3+/H2O2 oxidation-coagulation process. The effects of initial pH on wastewater, dosage of H2O2 and Fe3+ , reaction time, reaction temperature, pH and mass concentration of the coagulation agent were investigated.
Soil samples were soaked in simulated acid rain at different pH values (i.e., pH 1.0, 2.0, 3.0, 4.0, and 5.0), and distilled water for 24 h, and then the pH values and the concentrations of Fe, Mn and Zn of the leachate were determined by inductively coupled plasma–atomic emission spectrometry (ICP-AES).
The amounts of As Sb and Hg in mine tailing accounts for 50% of ore,the concentration of arsenic is about 4 000 mg/kg. But the concentration of arsenic in the leachate of mine tailing is only 90μg/L,which may be related with this goldmine is exploited nearly.
The BET surface area was 298 m2·g-1 and the contents of heavy metals in the leachate didn't exceed the contents limit.
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Mechanism studies on nitrogen removal when treating ammonium-rich leachate by sequencing batch biofilm reactor
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The nitrogen removal mechanism was studied and analyzed when treating the ammonium-rich landfill leachate by a set of sequencing batch biofilm reactors (SBBRs), which was designed independently.
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Performance of landfill leachate treatment system with disc-tube reverse osmosis units
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Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full scale at the Changshengqiao Sanitary Landfill, Chongqing City, China.