Substrate Type, Flow Characteristics, and Detention Times Related to Landfill Leachate Treatment Efficiency in Constructed Wetlands

2018 ◽  
pp. 47-56
Author(s):  
William E. Sanford
Keyword(s):  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Flow Characteristics ◽  
Substrate Type ◽  
Treatment Efficiency ◽  
Leachate Treatment ◽  
Type Flow

Landfill leachate treatment by an experimental subsurface flow constructed wetland in tropical climate countries

2005 ◽  
Vol 52 (12) ◽  
pp. 243-250 ◽  
Author(s):  
Z. Ujang ◽  
E. Soedjono ◽  
M.R. Salim ◽  
R.B. Shutes
Keyword(s):  
Heavy Metals ◽  
Constructed Wetlands ◽  
Constructed Wetland ◽  
Landfill Leachate ◽  
Subsurface Flow ◽  
Experimental Unit ◽  
Leachate Treatment ◽  
Emergent Plants ◽  
Subsurface Flow Constructed Wetland ◽  
Better Than

Municipal leachate was treated in an experimental unit of constructed wetlands of subsurface flow type. The parameters studied were organics (BOD and COD), solids and heavy metals (Zn, Ni, Cu, Cr and Pb). Using two types of emergent plants of Scirpus globulosus and Eriocaulon sexangulare, more than 80% removal was achieved for all the parameters. E. sexangulare removed organics and heavy metals better than Scirpus globulosus. A higher concentration of heavy metals in the influent did not change the removal efficiency.

The use of extended aeration and in-series surface-flow wetlands for landfill leachate treatment

1995 ◽  
Vol 32 (3) ◽  
pp. 119-128 ◽  
Author(s):  
Craig D. Martin ◽  
Keith D. Johnson
Keyword(s):  
Solid Waste ◽  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Surface Flow ◽  
Fecal Coliforms ◽  
Treatment Technique ◽  
Leachate Treatment ◽  
The Usa ◽  
Minimum Criteria

Recently in the USA, the Solid Waste Industry has undergone specific changes in landfill regulations. The Federal Resource Conservation and Recovery Acts (RCRA); and EPA subtitle D regulations, as well as stringent State regulations, impose minimum criteria for municipal solid waste facilities in the areas of location, operation, groundwater monitoring, and leachate management. In conjunction with these State and Federal mandates the University of West Florida developed a leachate treatment technique utilizing extended aeration and surface-flow constructed wetlands. Sampling of water quality has occurred monthly since February 1992. Parameters examined include: Nitrogen (NH3,), Total Suspended Solids (TSS), Total Phosphate (TPO4), Total Organic Carbon (TOC), pH, Alkalinity, and Chlorides. Chemical Oxygen Demand (COD), Total and Fecal Coliforms, Priority Pollutant Metals, and limited organic analytes are sampled on a less frequent basis. Samples are collected at a raw leachate site (L0), primary aerated lagoon (L1), and 6 stations within the 1.1 hectare constructed wetland complex (S1; W1; W3; W5; W7; W9) and one sandfilter (SF) location. Results thus far indicate removal percentages of the tested analytes average between 64% and 99%. This data suggests various physical, microbiological and chemical processes occurring within the aerated lagoon and constructed wetlands can provide an effective alternative to standard techniques for landfill leachate treatment and disposal. The methods as described have proven to be ideal for the circumstances occurring at the Perdido Landfill.

Leachate Treatment

2015 ◽  
pp. 369-386 ◽  
Author(s):  
Irvan Dahlan
Keyword(s):  
Solid Waste ◽  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Batch Reactor ◽  
Asian Countries ◽  
Leachate Treatment ◽  
Sequence Batch Reactor ◽  
Membrane Technologies ◽  
European Side ◽  
Very High

Landfilling is one of the most important methods for disposal of solid waste in many countries. One of the most obvious problems associated with the landfilling practice is the generation of leachate. This chapter reviews case studies on the on-site treatment of leachates using various technologies in selected European and Asian countries. It was shown that the generation of leachate varies widely in both quantity and quality in European and Asian countries. Biological treatment and membrane technology show very high efficiencies in treating leachate generated from Odayeri landfill (in European side of Turkey) and Komurcuoda landfill (at Asian side of Turkey). Leachates from Arpley landfill (UK) and Bukit Tagar landfill (Malaysia) were successfully treated using sequence batch reactor (SBR). Fairly good treatment efficiencies were obtained using constructed wetlands (CWs) in treating Gdansk-Szadolki landfill leachate in Poland. Furthermore, the use of coagulation, filtration and membrane technologies has been proven effectively in treating Nonthaburi landfill leachate in Thailand.

Leachate Treatment

2020 ◽  
pp. 1037-1054
Author(s):  
Irvan Dahlan
Keyword(s):  
Solid Waste ◽  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Batch Reactor ◽  
Asian Countries ◽  
Leachate Treatment ◽  
Sequence Batch Reactor ◽  
Membrane Technologies ◽  
European Side ◽  
Very High

Landfilling is one of the most important methods for disposal of solid waste in many countries. One of the most obvious problems associated with the landfilling practice is the generation of leachate. This chapter reviews case studies on the on-site treatment of leachates using various technologies in selected European and Asian countries. It was shown that the generation of leachate varies widely in both quantity and quality in European and Asian countries. Biological treatment and membrane technology show very high efficiencies in treating leachate generated from Odayeri landfill (in European side of Turkey) and Komurcuoda landfill (at Asian side of Turkey). Leachates from Arpley landfill (UK) and Bukit Tagar landfill (Malaysia) were successfully treated using sequence batch reactor (SBR). Fairly good treatment efficiencies were obtained using constructed wetlands (CWs) in treating Gdansk-Szadolki landfill leachate in Poland. Furthermore, the use of coagulation, filtration and membrane technologies has been proven effectively in treating Nonthaburi landfill leachate in Thailand.

Fungi immobilization for landfill leachate treatment

2010 ◽  
Vol 62 (6) ◽  
pp. 1240-1247 ◽  
Author(s):  
Jenjira Saetang ◽  
Sandhya Babel
Keyword(s):  
Landfill Leachate ◽  
Corn Starch ◽  
White Rot Fungi ◽  
White Rot ◽  
Optimum Conditions ◽  
Treatment Efficiency ◽  
Leachate Treatment ◽  
Cod Reduction ◽  
Optimum Ph ◽  
Effects Of Ph

This paper investigated treatment of landfill leachate collected from Nonthaburi landfill site, Thailand, by using immobilized white rot fungi, namely, Trametes versicolor BCC 8725 and Flavodon flavus BCC 17421. Effects of pH and co-substrates were investigated at different contact times. Three types of co-substrates as carbon source used in this study are glucose, corn starch and cassava. Treatment efficiency was evaluated based on color, BOD, and COD removal. Initial BOD and COD were found to be 5,600 and 34,560 mg/L, respectively. The optimum pH was found to be 4, the optimum co-substrate concentration (glucose, corn starch and cassava) was 3 g/L and the optimum contact time was 10 days for both types of fungi. Addition of glucose, corn starch and cassava as co-substrate at optimum conditions could remove 78, 74, and 66% of color, respectively for T. versicolor and 73, 68, and 60%, respectively, for F. flavus. Moreover, for T. versicolor, BOD and COD reduction of 69 and 57%, respectively, could be achieved at optimum conditions when using glucose as a co-substrate. For F. flavus, BOD and COD reduction of 66 and 52%, respectively were obtained when using glucose as a co-substrate. White rot fungi can be considered potentially useful in the treatment of landfill leachate as they can help in removing color, BOD and COD due to their biodegradative abilities.

Ultrasound as a pre-oxidation for biological landfill leachate treatment

2007 ◽  
Vol 55 (12) ◽  
pp. 175-179 ◽  
Author(s):  
E. Neczaj ◽  
M. Kacprzak
Keyword(s):  
Landfill Leachate ◽  
Irradiation Time ◽  
Ultrasound Irradiation ◽  
Ammonia Removal ◽  
Aerobic Treatment ◽  
Treatment Efficiency ◽  
Leachate Treatment ◽  
Field Frequency ◽  
Ultrasonic Pretreatment ◽  
Static Conditions

In this study, the effects of low energy ultrasound irradiation on landfill leachate treatment by means of sequencing bath reactor were investigated. The aim of this work was to estimate the influence of leachate irradiation time on aerobic treatment efficiency. The sonification of the leachate was carried out in static conditions using the disintegrator UD-20. The field frequency of 22 kHz (the power output equals to 180 W) and amplitude of 12 μm was applied. The sonification time was changed in the range of 30–140 s. It was found that ultrasonic pretreatment enhances the subsequent aerobic digestion resulting in a better degradation of landfill leachate. The sonification of raw leachate leads to enhancement of COD and ammonia removal as compare to experiment without ultrasound.

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