Leachate recirculation has a profound advantage on biodegradation of the organic fraction of municipal solid waste in landfills. Mature leachate from older sections of landfills (>10 years) and young leachate were blended and added to organic fraction of municipal solid waste in a series of biomethane potential assay experiments with different mixing ratios of mature and young leachate and their effect on biogas production was monitored. The improvement in biogas production was in the range of 19%−41% depending on the ratio of mixing old and new leachate. The results are conclusive that the biogas generation could be improved by blending the old and new leachate in a bioreactor landfill system as compared with a conventional system employed in bioreactor landfills today for recirculating the same age leachate.
AbouelenienFFujiwaraWNambaY. (2010) Improved methane fermentation of chicken manure via ammonia removal by biogas recycle. Bioresource Technology101: 6368–6373.
2.
APHA (2005) Standard Methods for the Examination of Water and Wastewater (21st edn). Washington DC: American Public Health Association.
3.
BashirMJKAzizHAYusoffMS. (2010) Application of response surface methodology (RSM) for optimization of ammoniacal nitrogen removal from semi-aerobic landfill leachate using ion exchange resin. Desalination254: 154–161.
4.
BergeNDReinhartDRDietzJ. (2006) In situ ammonia removal in bioreactor landfill leachate. Waste Management26: 334–343.
5.
BergeNDReinhartDRTownsendTG (2005) The fate of nitrogen in bioreactor landfills. Critical Reviews in Environmental Science and Technology35: 365–399.
6.
BilgiliMSDemirAOzkayaB (2007) Influence of leachate recirculation on aerobic and anaerobic decomposition of solid wastes. Journal of Hazardous Materials143: 177–183.
ChughSClarkeWPullammanappallilP. (1998) Effect of recirculated leachate volume on MSW degradation. Waste Management & Research16: 564–573.
9.
FrancoisVFeuilladeGMatejkaG. (2007) Leachate recirculation effects on waste degradation: Study on columns. Waste Management27: 1259–1272.
10.
GallertCWinterJ (1997) Mesophilic and thermophilic anaerobic digestion of source-sorted organic wastes: effect of ammonia on glucose degradation and methane production. Applied Microbiology and Biotechnology48: 405–410.
11.
Gonzalez-GilGKleerebezemR (2002) Assessment of metabolic properties and kinetic parameters of methanogenic sludge by on-line methane production rate measurements. Applied Microbiology and Biotechnology58: 248–254.
12.
HePQuXShaoL. (2007) Leachate pre-treatment for enhancing organic matter conversion in landfill bioreactor. Journal of Hazardous Materials142: 288–296.
13.
KarakashevDBatstoneDJAngelidakiI (2005) Influence of environmental conditions on methanogenic compositions in anaerobic biogas reactors. Applied and Environmental Microbiology71: 331–338.
14.
KimJPohlandFG (2003) Process enhancement in anaerobic bioreactor landfills. Water Science and Technology48(4): 29–36.
15.
LiHSZhouSQSunYB. (2009) Advanced treatment of landfill leachate by a new combination process in a full-scale plant. Journal of Hazardous Materials172(1): 408–415.
16.
LiuJLuoJZhouJ. (2012) Inhibitory effect of high-strength ammonia nitrogen on bio-treatment of landfill leachate using EGSB reactor under mesophilic and atmospheric conditions. Bioresource Technology113: 239–243.
17.
ManfrediSChristensenTH (2009) Environmental assessment of solid waste landfilling technologies by means of LCA-modeling. Waste Management29: 32–43.
18.
MorrisJWFVasukiNCBakerJA. (2003) Findings from long-term monitoring studies at MSW landfill facilities with leachate recirculation. Waste Management23: 653–666.
19.
PengYZhangSZengW. (2008) Organic removal by denitritation and methanogenesis and nitrogen removal by nitritation from landfill leachate. Water Research42: 883–892.
20.
ReinhartD (1996) Full-scale experiences with leachate recirculating landfills: case studies. Waste Management & Research14: 347–365.
21.
RenouSGivaudanJGPoulainS. (2008) Landfill leachate treatment: Review and opportunity. Journal of Hazardous Materials150: 468–493.
22.
SartajMAhmadifarMJashniAK (2010) Assessment of in-situ aerobic treatment of municipal landfill leachate at laboratory scale. Iranaian Journal of Science & Technology, Transactions B, Engineering34(B1): 107–116.
23.
ShahriariHWarithMHamodaM. (2012) Anaerobic digestion of organic fraction of municipal solid waste combining two pretreatment modalities, high temperature microwave and hydrogen peroxide. Waste Management32: 41–52.
24.
SunYSunXZhaoY (2011) Comparison of semi-aerobic and anaerobic degradation of refuse with recirculation after leachate treatment by aged refuse bioreactor. Waste Management31: 1202–1209.
