00000ctm a22000004a 4500 UP-99796217602799166 Buklod 20230503092542.0 m |o d | ta 020827s2002 xx r |||| u|eng d (iLib)UPD-00000153485 DML Eng DMLUC LG 995 2002 E653 D86 Dumlao, Maria Isabel R. Carbon and nitrogen removal from sanitary landfill leachate in an aerobic moving bed biofilm anoxic suspended growth reactor Maria Isabel Roa Dumlao. 2002. [xiv], 113,[21] leaves ill. Thesis (M.S. Environmental Engineering)--University of the Philippines, Diliman. This study focused on two main objectives: (1) to determine the biodegrdability of the leachate from a sanitary landfill, and (2) to determine the efficiency of an Aerobic Moving Bedd Biofilm Reactor (AMBB/ASGR) in treating high-strength leachate and compare it with a conventional Aerobic/Anoxic Suspended Growth Reactor (A/ASGR). The potential advantages of this hybrid system over conventional A/ASGR are lower energy requirements, reduced sludge production and higher biomass concentration. The leachate came from San Mateo sanitary landfill. Duplicate simultaneous runs were performed for the biodegradability test. Following the Modified Semi-Continuous Activated Sludge Test, the flasks were operated for 41 days with an influent of 1,270 +/- 262 mg/L average total COD level. The leachate from the landfill was found to be only partially biodegradable. Total COD reduction of 24.80%to 40.06% was achieved after 41days of operation. To determine the performance of the two reactors in removing tCOD and total NH4+ -N, tow reactors, each with a working volume of 8.705 L, were used.Both reactors have five chambers: aerobic in the middle, anoxic and settling zones on both sides. One reactor, the Aerobic Moving Bed Biofilm/Anoxic Suspended Growth Reactor (AMBB/ASGR) has its aerobic chamber filled with Kaldnes carrier materials, while the other, the Aerobic/Anoxic Suspended Growth Reactor (A/ASGR) has none of these carrier elements. The raw leachate was firstly diluted to an average total COD value of approximately 1,000 mg/L before it was fed to the reactors. The reactors were both operated at an HRT of 24 hours during the first 82 days of the run while 36 hours in the next 71 days of operation at 25-28°C. The influent and effluent tCOD, NO2- -N, NH4+ -N and NO3- -N concentrations were determined to assess the performance of the reactors. Temperature, pH and dissolved oxygen in each chamber were likewise monitored during the investigation period. Total COD, NO2- -N, NH4+ -N and NO3- -N concentrations were obtained at the end of each run to get the concentration profiles across each reactor. Increasing the HRT from 24 hours to 36 hours increased the percent tCOD removals from 23.39 +/- 10.01% to 35.27 +/- 11.47% in the two reactors. A higher NH4+ -N reduction of 122.5 +/- 41.25 mg/L is achieved in AMBB/ASGR only at lower NH4+ -N loading rates (0.06-0.19 g/L-d) Average NH4+ -N reduction at NH4+ -N loading rate range of 0.22 -0.48 g/L-d was 150.05 +/-92.04 mg/L in the two reactors. THe concentrations of NO2- -N in both reactors were relatively greater than 100 mg/L as long as the calculated free NH3 concentrations in the effluent were higher than 1 mg/L and at concentrations greater than 0.001 - 2 mg/L of free HNO2. Sanitary landfills Leaching. Philippines San Mateo (Rizal) Bioreactors Philippines. Leachate Biodegradation Philippines San Mateo (Rizal). Thesis FI UPD DARCHIVES LG 995 2002 E653 D86 UPD DENG-II LG 995 2002 E653 D86 Thesis