Microbes in biological processes for municipal landfill leachate treatment: Community, function and interaction

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.

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Municipal Landfill Leachate Treatment for Metal Removal Using Water Hyacinth in a Floating Aquatic System

Water Environment Research ◽

10.2175/106143005x72849 ◽

2006 ◽

Vol 78 (9) ◽

pp. 951-964 ◽

Cited By ~ 12

Author(s):

A. S. El-Gendy ◽

N. Biswas ◽

J. K. Bewtra

Keyword(s):

Landfill Leachate ◽

Water Hyacinth ◽

Metal Removal ◽

Aquatic System ◽

Leachate Treatment ◽

Municipal Landfill

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Biological Treatment Technology for Landfill Leachate

Control and Treatment of Landfill Leachate for Sanitary Waste Disposal - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-4666-9610-5.ch010 ◽

2015 ◽

pp. 219-249

Author(s):

Husnul Azan Bin Tajarudin ◽

Mohd Firdaus Bin Othman ◽

Noor Aziah Binti Serri ◽

Muhammad Redzwan Bin Tamat

Keyword(s):

Landfill Leachate ◽

Biological Treatment ◽

Biological Process ◽

Low Cost ◽

New Technology ◽

Environmentally Friendly ◽

Biological Processes ◽

Treatment Technology ◽

Leachate Treatment ◽

Environmental Preservation

Biological process for environmental preservation and treatment is not a new technology. It was used a decade ago until now. The most important tools in biological processes are the microorganism and upstream instruments (bioreactor, pond and others) to run the process. Furthermore, the efficiency of the process depends on many factors such as temperature, pH, type of microorganism, conditions, and other nutrients. To understand the factors that will affect the process, mechanisms of microorganisms to treat or protect the environment must be considered. For leachate treatment, biological process is one of the most widely used techniques for low cost and environmentally friendly.

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