Landfill Leachate Treatment by Yeast and Bacteria Based Membrane Bioreactors

2004 ◽  
Vol 39 (9) ◽  
pp. 2391-2404 ◽  
Author(s):  
B. Wichitsathian ◽  
S. Sindhuja ◽  
C. Visvanathan ◽  
K. H. Ahn
Keyword(s):  
Landfill Leachate ◽  
Membrane Bioreactors ◽  
Leachate Treatment

Effects of mixed liquor pH on membrane fouling and micro-pollutant removals in membrane bioreactors for municipal landfill leachate treatment

2015 ◽  
Vol 72 (5) ◽  
pp. 770-778 ◽  
Author(s):  
Samunya Sanguanpak ◽  
Chart Chiemchaisri ◽  
Wilai Chiemchaisri ◽  
Kazuo Yamamoto
Keyword(s):  
Landfill Leachate ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Membrane Bioreactors ◽  
Leachate Treatment ◽  
Mixed Liquor ◽  
Municipal Landfill ◽  
Inorganic Substances ◽  
Ph Level ◽  
Ph Variations

This research investigated the membrane fouling and micro-pollutant removals in treatment of municipal landfill leachate at various pH levels (i.e. 5.5, 6.5, 7.5, and 8.5) using membrane bioreactors. The findings revealed that membrane fouling was influenced by the pH level of mixed liquor, with pH 5.5 exhibiting the most severe membrane fouling. At pH 5.5, proteins and carbohydrates were predominant in the membrane foulants, while at pH 8.5 humic-like and inorganic substances constituted the largest proportion of the foulants on the membrane surface. The removal efficiencies of micro-pollutants (bisphenol-A; 2,6-di-tert-butylphenol and 2,6-di-tert-butyl-4-methylbutylphenol) were nevertheless insignificantly influenced by the pH levels of mixed liquor. In addition, the removal rates of the compounds at pH 5.5 were slightly lower vis-à-vis at the higher pH levels. The micro-pollutant retention on the fouled membranes was also significant and highest under the mixed liquor pH of 8.5. Furthermore, the experiments demonstrated that the varying degrees of rejection by the fouled membranes could be attributed to the alteration of foulant characteristics as a result of the pH variations.

Comparison of commercial baker’s yeast versus bacteria-based membrane bioreactors for landfill leachate treatment

2017 ◽  
Vol 39 (18) ◽  
pp. 2365-2372 ◽  
Author(s):  
M. C. S. Amaral ◽  
G. C. B. Brito ◽  
B. G. Reis ◽  
L. C. Lange ◽  
W. G. Moravia
Keyword(s):  
Landfill Leachate ◽  
Membrane Bioreactors ◽  
Baker’S Yeast ◽  
Baker's Yeast ◽  
Leachate Treatment

Occurrence and removal of endocrine disrupters in landfill leachate treatment plants

2003 ◽  
Vol 48 (3) ◽  
pp. 127-134 ◽  
Author(s):  
T. Wintgens ◽  
M. Gallenkemper ◽  
T. Melin
Keyword(s):  
Activated Carbon ◽  
Bisphenol A ◽  
Reverse Osmosis ◽  
Landfill Leachate ◽  
Endocrine Disrupting Compounds ◽  
Membrane Bioreactors ◽  
Industrial Chemicals ◽  
Activated Carbon Adsorption ◽  
Leachate Treatment ◽  
Carbon Adsorption

Endocrine disrupting compounds can affect the hormone system in organisms. Industrial chemicals with estrogenic effects were detected in large quantities in landfill leachates. Membrane technology has proven to be an effective barrier to these substances and thus widely applied in the treatment of landfill leachate. The removal techniques under investigation are membrane bioreactors, nanofiltration, activated carbon adsorption, ozonation as well as reverse osmosis. Investigations were conducted at two different landfill leachate treatment plants with a variety of process configurations. The xenoestrogenic substances nonylphenol and bisphenol A were detected in high μg/L-ranges in raw landfill leachate. Membrane bioreactors (MBRs) were capable of removing more than 80% of the nonylphenol load. Final effluent concentrations range between 1-12 μg/L nonylphenol and 3-30 μg/L bisphenol A respectively. Reverse osmosis treatment proved to be less effective in nonylphenol and bisphenol A removal than MBRs with further polishing stages like nanofiltration and activated carbon adsorption.

scholarly journals Application of Electrocoagulation with a New Steel-Swarf-Based Electrode for the Removal of Heavy Metals and Total Coliforms from Sanitary Landfill Leachate

2021 ◽  
Vol 11 (11) ◽  
pp. 5009
Author(s):  
Mayk Teles de Oliveira ◽  
Ieda Maria Sapateiro Torres ◽  
Humberto Ruggeri ◽  
Paulo Scalize ◽  
Antonio Albuquerque ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Landfill Leachate ◽  
Lower Cost ◽  
Sanitary Landfill ◽  
Leachate Treatment ◽  
Removal Of Heavy Metals ◽  
Waste Characteristics ◽  
Electrode Passivation ◽  
Steel Swarf ◽  
Sanitary Landfill Leachate

Sanitary landfill leachate (LL) composition varies according to climate variables variation, solid waste characteristics and composition, and landfill age. Leachate treatment is essentially carried out trough biological and physicochemical processes, which have showed variability in efficiency and appear a costly solution for the management authorities. Electrocoagulation (EC) seems a suitable solution for leachate treatment taking into account the characteristics of the liquor. One of the problems of EC is the electrode passivation, which affects the longevity of the process. One solution to this problem could be the replacement of the electrode by one made of recyclable material, which would make it possible to change it frequently and at a lower cost. The objective of the present work was to evaluate the removal of heavy metals (As, Ba, Cd, Cr, Cu, Fe, Pb, Mn, Ni, Se and Zn) and coliforms from a LL by EC using electrodes made from steel swarf (SfE) up to 8 h. Removal efficiencies of detected heavy metals were 51%(Cr), 59%(As), 71%(Cd), 72%(Zn), 92%(Ba), 95%(Ni) and >99%(Pb). The microbial load of coliforms in leachate was reduced from 10.76 × 104 CFU/mL (raw leachate) to less than 1 CFU/mL (after treatment with SfE) (i.e., approximately 100% reduction). The use of SfE in EC of LL is very effective in removing heavy metals and coliforms and can be used as alternative treatment solution for such effluents.

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