LAUSR

A combined process of acrylic biomass carrier and activated sludge system (traditional system) was accomplished to treat sanitary landfill young leachate with a high concentration of ammoniacal nitrogen and organic material. Stable treatment performance of an acrylic biomass carrier reactor with activated sludge traditional reactor combined with bio-fringe loaded with microorganisms (CASBF) compared to activated sludge traditional reactor (CASR) was obtained under 10 L laboratory-scale reactor as 24 h sequencing batch reactor system and 2–5 mg/L dissolved oxygen, the temperature of (20°C–25°C), pH 7 ± 1, a volumetric organic load of 1,968 mg/L COD (chemical oxygen demand – COD), high ammoniacal nitrogen loading rates of 1,904.1 mg/L, food to microorganism ratio of 0.25, mixed liquor volatile suspended solid of 1,500 mg/L, sludge age of 2.7 d and hydraulic retention time of 1.7 d for 13 d duration of the experiment, respectively. The efficiency of both reactors was assessed based on the reduction in biochemical oxygen demand (BOD5), COD, ammoniacal nitrogen (NH3–N), total Kjeldahl nitrogen (TKN), phosphate (PO4), nitrite (NO2), nitrate (NO3), suspended solids and color. The results revealed that the reactor with CASBF efficiency removed NO2, NO3 and PO4 were 77.7% with effluent concentration 10 mg L–1, 86.25% with effluent concentration 21.0 mg L–1, and 63.2% with effluent concentration 18.1 mg L–1 respectively from young leachate in comparison to CASR which exhibited the efficiently removed of NO2, NO3, and PO4 was 20.7% with effluent concentration 36.1 mg L–1, 54.2% with effluent concentration 69.9 mg L–1, and 45.6% with effluent concentration 26.5 mg L–1, respectively. However, the reduction of NH3–N also TKN was more within the CASR and achieved 68.7% with effluent concentration 538.90 mg L–1 for TKN and 92.5% with effluent concentration 134.2 mg L–1 for NH3–N. This reduction is achieved via nitrification and denitrification processes. These findings indicated that CASBF has high efficiency of removal of COD, BOD, NO3, and PO4 from sanitary landfill young leachate and have the applicability for sanitary landfill young leachate treatment.