04526nas a2200433 a 4500 20260818094214.0 080821s2008 th uu|m rtt 0| a1eng d .b11979884 AIT Thesis no.EV-08-4 Chaudhary, Binod Kumar Dry continuous anaerobic digestion of municipal solid waste in thermophilic conditions Pathum Thani, Thailand : Asian Institute of Technology, 2008 92 p. : ill. + 1 online resource Thesis ; no. EV-08-4 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management Thesis (M.Eng.) - Asian Institute of Technology, 2008 The anaerobic digestion of municipal solid waste is a process that has become a promising technology in waste management throughout the world. Thus, the objective of this study was to optimize the applications of anaerobic digestion to the treatment of municipal solid wastes. To achieve this, the pilot scale experiment was conducted in inclined type plug flow reactor. Initially OFMSW was digested successively in start-up process to acclimatize the reactor. Firstly, the reactor was operated in mesophilic condition (37°C) and was shifted to thermophilic (55°C) condition by gradually increasing the temperature at the rate of 2 °C per day. The start-up process was established over a period of 8 weeks and the highest volume of biogas production (791L/d) and methane composition (66%) was achieved at day 3 8. Dry continuous anaerobic digestion of source-sorted OFMSW was investigated in thermophilic condition with three different organic loading rates (OLR) of 2.5, 3.3 and 3.9 kg VS/m³.d for constant retention time of 25 days. The reactor showed stable performance with highest biogas yield (278.4 L CH₄/kg VS) with VS reduction of around 59.21% during loading rate 1. However, the biogas yield and VS reduction during loading rates 2 and 3 were found relatively less than the loading rate 1. The result showed the accumulation of VFA which is the inhibiting conditions for methanogenic activity which was confirmed by the decreased of pH below 6.5 during theses loading rates. In this study, the post-treatment of the fresh digestate was done to increase the TS concentration thereby decreasing the weight and volume of fresh digestate for the transportation as well as made suitable for composting or soil amendment. The results obtained during post refining process shows that the high increase of the TS concentration was achieved during the retention time of 15 days as well as the decrease in the pollutant loads of the percolate (leachate). Similarly, the nutrient contents and calorific value (12.1 MJ/kg DW) of the digestate showed that they are well within the WHO and Thailand standards. So they can be used as fertilizer as well as for refuse derived fuel (RDF). This study also confirmed about the energy production and consumption within the system itself and found about 80 % surplus energy from this system Refuse and refuse disposal Visvanathan, C., Chairperson Congrak Polprasert, Examination committee Chart Chiemchaisri, Examination committee Japan, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-08-4 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B02427 .b11979884 mnait u 250616 0 080821 m a u 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050120736532 CREATED : 2004-08-29 RECORD # : i12473522 LPATRON : 1028536 LCHKIN : 2018-04-02 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 12 TOT RENEW : 10 Barcode : 30050120736508 CREATED : 2004-11-13 RECORD # : i12482195 LPATRON : 1027107 LCHKIN : 2018-01-25 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 15 TOT RENEW : 17 Barcode : 30050160049267 CREATED : 2016-05-31 RECORD # : i13005388 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120933261 CREATED : 2019-11-27 RECORD # : i13234006 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 31756 31756 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-08-4 30050120736532 2026-08-18 09:42:14 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-08-4 30050120736508 2026-08-18 09:42:14 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-08-4 30050160049267 2026-08-18 09:42:14 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 50.00 0 AIT Thesis no.EV-08-4 30050120933261 2026-08-18 09:42:14 3 2026-08-18 20