Improvement of leachate quality and waste stabilization in pilot-scale bioreactor landfills containing geotextile filters and sewage sludge

2019 ◽  
Vol 158 ◽  
pp. 41-58
Author(s):  
Cevat Yaman
Keyword(s):  
Sewage Sludge ◽  
Pilot Scale ◽  
Bioreactor Landfills ◽  
Waste Stabilization ◽  
Leachate Quality ◽  
Geotextile Filters

scholarly journals Community Structure of Bacteria and Archaea Associated with Geotextile Filters in Anaerobic Bioreactor Landfills

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1377
Author(s):  
Cevat Yaman ◽  
Suriya Rehman ◽  
Tanveer Ahmad ◽  
Yusuf Kucukaga ◽  
Burcu Pala ◽  
...  
Keyword(s):  
Community Structure ◽  
Single Layer ◽  
16S Rrna Gene Sequencing ◽  
Pilot Scale ◽  
Rrna Gene ◽  
Bioreactor Landfills ◽  
Operational Optimization ◽  
Drainage Layers ◽  
Rrna Gene Sequencing ◽  
Geotextile Filters

Landfills are an example of an environment that contains highly complex communities of microorganisms. To evaluate the microbial community structure, four stainless steel pilot-scale bioreactor landfills with single- and double-layered geotextile fabric were used. Two reactors (R-1 and R-2) contained municipal solid waste (MSW) and sewage sludge, while the other two reactors (R-3 and R-4) contained only MSW. A single layer of geotextile fabric (R2GT3 and R3GT3) was inserted in the drainage layers of the two reactors (R-2 and R-3), while a double layer of geotextile fabric (R4GT2 and R4GT1) was inserted in one of the reactors (R-4). Scanning electron microscopy demonstrated that biomass developed on the geotextile fabrics after 540 days of bioreactor operation. The metagenomics analyses of the geotextile samples by 16S rRNA gene sequencing indicated that the geotextile bacterial communities were dominated by the phyla Firmicutes, Bacteroidetes, and Thermotogeae, while Proteobacteria were detected as the rarest bacterial phylum in all the geotextile samples. Treponema, Caldicoprobacter, and Clostridium were the most dominant anaerobic and fermentative bacterial genera associated with the geotextile fabric in the bioreactors. Euryarchaeota was the predominant archaean phylum detected in all the geotextile samples. In the archaeal communities, Methanosarcina, and Vadin CA11 were identified as the predominant genera. The diversity of microorganisms in landfill bioreactors is addressed to reveal opportunities for landfill process modifications and associated operational optimization. Thus, this study provides insights into the population dynamics of microorganisms in geotextile fabrics used in bioreactor landfills.

Achieving “Final Storage Quality” of municipal solid waste in pilot scale bioreactor landfills

2009 ◽  
Vol 29 (1) ◽  
pp. 78-85 ◽  
Author(s):  
R. Valencia ◽  
W. van der Zon ◽  
H. Woelders ◽  
H.J. Lubberding ◽  
H.J. Gijzen
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pilot Scale ◽  
Bioreactor Landfills ◽  
Storage Quality

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.

scholarly journals Hydrothermal liquefaction of sewage sludge; energy considerations and fate of micropollutants during pilot scale processing

2020 ◽  
Vol 183 ◽  
pp. 116101
Author(s):  
Lars Bjørn Silva Thomsen ◽  
Pedro N. Carvalho ◽  
Juliano Souza dos Passos ◽  
Konstantinos Anastasakis ◽  
Kai Bester ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Pilot Scale ◽  
Hydrothermal Liquefaction

Control and separation of algae particles from WSP effluent by using floating aquatic plant root mats

2001 ◽  
Vol 43 (11) ◽  
pp. 315-322 ◽  
Author(s):  
Y. Kim ◽  
W.-J. Kim ◽  
P.-G. Chung ◽  
W. O. Pipes
Keyword(s):  
Water Hyacinth ◽  
Aquatic Plant ◽  
Plant Root ◽  
Pilot Scale ◽  
Waste Stabilization Ponds ◽  
Attachment Sites ◽  
Waste Stabilization ◽  
Continuous Reproduction ◽  
Adsorption Phenomena ◽  
Integrated Processes

In this paper, the potential uses of water hyacinth and its root mats for separating algae particles in the effluent from waste stabilization ponds (WSPs) were discussed. Pilot-scale integrated processes consisting of WSPs and multiple WHPs (water hyacinth ponds) were operated in order to extract effects of the root mats on the reduction of algae concentrations. Root mats in the bottom of WHPs separated significant amount of the algae cells through attachment as the effluent from WSPs passed through them. Attachment of the algae particles to the surface of live roots was found to be similar to adsorption phenomena but it lasted even at saturation, probably due to the continuous reproduction of active attachment sites by detachment and growth of the roots. Additionally, this paper discusses attachment mechanisms and other issues concerning design and polishing of the WSPs effluent by WHPs.

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