Dear Syazwan A. M.,

The following publications cover the answer to your question:

1-Environ Sci Pollut Res Int. 2014 Jun;21(12):7522-9. doi: 10.1007/s11356-014-2674-5. Epub 2014 Mar 6.

Influence of the composition and removal characteristics of organic matter on heavy metal distribution in compost leachates.

He XS1, Xi BD, Li D, Guo XJ, Cui DY, Pan HW, Ma Y.

Author information

Abstract

Compost leachates were collected to investigate the influence of the composition and removal of volatile fatty acids (VFAs), humic-like substances (HSs), and dissolved organic nitrogen (DON) on heavy metal distribution during the leachate treatment process. The results showed that acetic and propionic acids accounted for 81.3 to 93.84% of VFAs, and that these acids were removed by the anaerobic-aerobic process. Humic- and fulvic-like substances were detected by excitation-emission matrix spectroscopy coupled with parallel factor analysis, and their content significantly decreased after the anaerobic and membrane treatments. DON in compost leachates ranged from 26.53 mg L(-1) to 919.46 mg L(-1), comprised of dissolved free amino acids and the protein-like matter bound to humic- and fulvic-like substances, and was removed by the aerobic process. Correlation analysis showed that Mn, Ni, and Pb were bound to VFAs and protein-, fulvic-, and humic-like substances in the leachates. Co was primarily bound to fulvic- and humic-like matter and inorganic sulfurs, whereas Cu, Zn, and Cd interacted with inorganic sulfur.

http://www.ncbi.nlm.nih.gov/pubmed/24595753

2-African Journal of Biotechnology Vol. 8 (18), pp. 4572-4581, 15 September, 2009

Available online at http://www.academicjournals.org/AJB

ISSN 1684–5315 © 2009 Academic Journals

Full Length Research Paper

The Effect of C:N:P ratio, volatile fatty acids and Na

+ levels on the performance of an anaerobic treatment of

fresh leachate from municipal solid waste transfer

station

Anaerobic digestion was carried out in this study to treat fresh leachate from municipal solid waste transfer station in a 10 L stirred tank reactor (STR). The treatment process was performed in batch and semi-continuous process. Palm oil mill effluent (POME) sludge was used as an inoculum. A high BOD reduction was achieved in 3 different treatment conditions in this study. A BOD removal of 85, 77 and 90% for the batch (Experiment 1), semi-continuous process without pH adjustment (Experiment 2) and semi-continuous process with pH adjustment (Experiment 3), respectively were recorded. It was observed that there was no significant deficiency in required nutrients for Experiment 1, 2 and 3 in this

work. High concentration of volatile fatty acids (VFAs) was detected in Experiment 3 which indicated the instability of bioreactor in which lower methanogenic activity was observed. The levels of acetic acid (HAc) and propionic acid (HPr) appeared to be the VFA species that accumulated and started to cause an imbalance in the reactor. It was found that the use of large amount of sodium hydroxide (NaOH) to adjust the bioreactor pH had caused an inhibition of the metabolic activity of

methanogenesis bacteria that involved in the methane production.

http://www.ajol.info/index.php/ajb/article/viewFile/62419/50386

3- Journal of Chemistry

Volume 2015 (2015), Article ID 640717, 9 pages

http://dx.doi.org/10.1155/2015/640717

Research Article

Effect of Volatile Fatty Acid Concentration on Anaerobic Degradation Rate from Field Anaerobic Digestion Facilities Treating Food Waste Leachate in South Korea

Dong-Jin Lee,1 Su-Young Lee,1 Ji-Su Bae,1 Jung-Gu Kang,1 Ki-Heon Kim,1 Sung-Su Rhee,1 Jong-Hwan Park,2 Ju-Sik Cho,3 Jin Chung,1 and Dong-Cheol Seo3

1Environmental Resources Research Department, National Institute of Environmental Research, Environmental Research Complex, Incheon 404-708, Republic of Korea

2Division of Applied Life Science (BK21 Plus) and Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea

3Department of Bio-Environmental Sciences, Sunchon National University, Suncheon 540-742, Republic of Korea

Received 5 February 2015; Accepted 17 April 2015

Academic Editor: Jimmy T. Efird

Copyright © 2015 Dong-Jin Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study was to investigate the effect of volatile fatty acid concentration on anaerobic degradation rate of food waste leachate in the anaerobic digestion facilities. The anaerobic digestion facilities treating food waste leachate (FWL), codigestion with food leachate and animal manure (A-MIX), and codigestion with food waste leachate and sewage sludge (S-MIX) were selected for this study. In accordance with the regulation under Wastes Control Act in South Korea, the guideline of volatile solid removal rate for anaerobic digestion facility is set as 65% for anaerobic degradation efficiency. Highest volatile solids removal rates were achieved from FWL (63.5%) than A-MIX (56.4%) and S-MIX (41.2%). Four out of eight FWLs met the guidelines. The concentration of volatile fatty acids, therefore, was analyzed to determine the relationship with volatile solid removal rate. The results showed that, in order to meet the Korean guideline of 65% volatile solid removal rate, volatile fatty acid concentrations should remain below 4,000 mg/L on the field anaerobic digestion facilities treating FWL. Volatile fatty acid concentrations should be used along with others as an operational parameter to control and manage the anaerobic digestion process

http://www.hindawi.com/journals/jchem/2015/640717/

4- Arabian Journal of Chemistry

Available online 29 September 2013

In Press, Corrected Proof — Note to users

Open Access

Review

Perspectives on technology for landfill leachate treatment

Yao Peng,

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doi:10.1016/j.arabjc.2013.09.031

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Open Access funded by King Saud University

Under a Creative Commons license

 Abstract

Landfills are designed to dispose high quantities of waste at economical costs with potentially less environmental effects; however, improper landfill management may pose serious environmental threats through discharge of high strength polluted wastewater also known as leachate. This paper focused on achievements on landfill leachate treatment by different technology, which contains biological treatment and membrane technology. Finally, development and prospect of landfill leachate treatment were predicted.

http://www.sciencedirect.com/science/article/pii/S1878535213003298

Hoping this will be helpful,

Rafik

Thanks for the fast reply, i will check the given sources.