PERFORMANCE OF ULTRASONIC WAVE AND H2O2 AS AN ADVANCED OXIDATION PROCESS IN PRE-TREATMENT OF LANDFILL LEACHATE USING AERATED BIOFILTER

Tuan Van Le

Abstract


This work presents batch mode experiments of combination ultrasonic wave (USW) and H2O2 in pre-treatment of landfill leachate. Additionally, in continuous mode experiments, a modified aerated bio-filter (ABF) was designed for the treatment of synthetic wastewater and the leachate (after treatment by USW/H2O2), with the stepwise increasing the volume ratios between the leachate and synthetic wastewater up to 100% of the leachate. The leachate was collected from Thuy Phuong landfill in Thua Thien Hue province, Vietnam, with characterized of color: 14,213 ± 150 PCU (n=3), N-NH4: 1213 ± 148 mg/L (n = 3), COD: 6068 ± 1611 mg/L (n = 3), BOD5: 1211 ± 158 mg/L (n=3), BOD5/COD: ~0.21 and pH ~7.7. The USW/H2O2 had shown a great potential to remove COD, N-NH4 and color of the raw leachate in short treatment time (5 mins). The ABF system was well operated with organic loads (0.26 to 1.13 kg-COD/m3/d), with a very small sludge volume was formed. Moreover, the presence H2O2 can be used for decreasing odor of the leachate. As “green” advanced oxidation process (AOPs), the combination of USW/H2O2 could be used to improve the effectiveness of activated sludge process in treatment of refractory compounds from landfill leachate.

Keywords


ultrasonic, H2O2, aerated bio-filter, landfill leachate, AOPs.

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DOI: https://doi.org/10.15625/2525-2518/58/5A/15149 Display counter: Abstract : 119 views. PDF : 119 views.

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Published by Vietnam Academy of Science and Technology