Acceleration of the Degradation of Leachate with Introduced Microbes in Bioreactor Sanitary Landfill

2013 ◽  
Vol 750-752 ◽  
pp. 1304-1308 ◽  
Author(s):  
Yang Liu ◽  
Zhong Ping Qiu ◽  
Gui Chen Wang
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pollution Control ◽  
Ammonia Nitrogen ◽  
Living Standards ◽  
Bioreactor Landfill ◽  
Effective Technology ◽  
Contrast Group ◽  
Group Concentration ◽  
Formation Phase

Urbanization, economic growth, and the continuing improvement in living standards have all contributed to the increase of municipal solid waste. More effective technology is needed to improve the conditional landfill of municipal solid waste. Multifunctional microbe community introduced in bioreactor landfill accelerates the degradation of leachate of MSW( Municipal Solid Waste). The results show that introduced microbes shorten the acid formation phase effectively, 208 days earlier than contrast group; introduced microbes accelerated the degradation of leachate. Concentration ofCODof leachate decreases significantly and remains 3000mg/Lafter 505thday, 187 days earlier than contrast group. Concentration of ammonia nitrogen of leachate decomposes more rapidly (63 days earlier) and finally reaches 0.025g/Lat 700thday that meets the national pollution - control requirements of MSW (GB 16889-2008).

DecoMSW: A Methodology to Assess Decomposition of Municipal Solid Waste for Initiation of Landfill Mining Activities

2021 ◽  
Vol 47 (3) ◽  
pp. 465-481
Author(s):  
Arif Mohammad ◽  
Venkata Siva Naga Sai Goli ◽  
Agnes Anto Chembukavu ◽  
Devendra Narain Singh
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Nitrate Nitrogen ◽  
Spatial And Temporal Variation ◽  
Mining Activities ◽  
Bioreactor Landfill ◽  
Chemical Parameters ◽  
Landfill Mining ◽  
Humus Substances ◽  
Volatile Solids

Biochemical decomposition of municipal solid waste (MSW) in landfills leads to the generation of leachate, gases and humus substances. In this context, a methodology to assess D ecomposition of MSW, designated as DecoMSW, has been developed; based on a series of tests conducted on samples of the fresh MSW and those retrieved from the active bioreactor landfill (BLF) cells of age from 13 to 48 months. Furthermore, spatial and temporal variation in the (i) physical (composition) and (ii) chemical (pH, volatile solids, total organic carbon, elemental analysis, ammonium and nitrate-nitrogen, biomethanation potential, lignocellulosic content) characteristics of the MSW samples exhumed from the landfill have been established. Finally, these characteristics were correlated vis-à-vis the respective values of the fresh MSW. From this exercise, it has been observed that except for nitrate-nitrogen, all other chemical parameters of MSW decrease exponentially with time until 20 months, and beyond that, they remain constant, which is an indication of stabilization of MSW. In short, it has been demonstrated that DecoMSW is instrumental in assessing the state of decomposition of MSW with respect to time in the BLF and facilitates initiation of the landfill mining activities.

scholarly journals Effect of aeration on fresh and aged municipal solid waste

2021 ◽  
Author(s):  
Graham Jon Takata
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pollution Control ◽  
Bioreactor Landfills ◽  
Anaerobic Conditions ◽  
Waste Stabilization ◽  
Time To Stabilization ◽  
Aerobic Bioreactors ◽  
Term Monitoring

Under the anaerobic conditions of conventional sanitary landfill, entombed municipal solid waste (MSW) is slow to stabilize necessitating long-term monitoring and pollution control. Although anaerobic conditions can provide revenue through energy generation, aerobic stabilization may offer several advantages including reduced fugitive greenhouse gas emissions, accelerated landfill stabilization, and increased landfill airspace recovery. Air injection was applied to bench-scale bioreactor landfills in order to determine the potential for active aeration to accelerate municipal solid waste stabilization and settlement in both new and pre-existing landfills. Fresh and aged wastes were used to represent newly constructed and existing landfill matrices over 130 days. In the fresh MSW bioreactors, aeration reduced the time to stabilization of leachate pH by 44%, TSS by 25%, TDS by 54%, BOD5 by 38% and COD by 59%. Ammonia concentrations stabilized after 129 days of aeration, but remained problematic in the anaerobic bioreactors at the study conclusion. Final leachate concentrations were consistently lower in the aerobic bioreactors than in their anaerobic counterparts. Physical settlement also improved, resulting in a 21.5% recovery of landfill airspace in the aerobic fresh waste bioreactors. Aeration had a similar but reduced influence in the aged waste bioreactors since they were near stabilization at the study inception. The results of this study indicate that aeration significantly accelerates stabilization of MSW with greatest influence on fresh waste with a high biodegradable organic fraction.

Design of Leachate Treatment Project in Fan County Municipal Solid Waste Landfill Site

2012 ◽  
Vol 599 ◽  
pp. 299-304
Author(s):  
Wei Jin Gong ◽  
Yue Liu
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pollution Control ◽  
Landfill Site ◽  
Leachate Treatment ◽  
Municipal Solid Waste Landfill ◽  
Effluent Quality ◽  
Waste Landfill

The leachate treatment project in Fan county Municipal Solid Waste Landfill Site was constructed according to the Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889- 2008). It adopted Striping－UASB－A/O－MBR－RO process. Since being put into operation on June 15, 2009, the leachate treatment project has operated for more than two years, and the effluent quality was excellent.

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