scholarly journals Aromatic Compounds and Organic Matter Behavior in Pilot Constructed Wetlands Treating Pinus Radiata and Eucalyptus Globulus Sawmill Industry Leachate

2019 ◽  
Vol 9 (23) ◽  
pp. 5046
Author(s):  
C. Muñoz ◽  
G. Gómez ◽  
A.I. Stefanakis ◽  
C. Plaza de los Reyes ◽  
I. Vera-Puerto ◽  
...  
Keyword(s):  
Organic Matter ◽  
Constructed Wetlands ◽  
Pinus Radiata ◽  
Aromatic Compounds ◽  
Eucalyptus Globulus ◽  
Surface Flow ◽  
Organic Loading Rate ◽  
Total Phenolic ◽  
Leachate Treatment ◽  
Sawmill Industry

The objective of this research was to evaluate the fate of aromatic compounds and organic matter in pilot constructed wetlands (CW) treating Pinus radiata and Eucalyptus globulus sawmill industry leachate. Six lab-scale surface flow CW were built and fed in batches. Three CW were fed with P. radiata leachate, while the other three CW were fed with E. globulus leachate. Each group of three CW included two CW planted with Phragmites australis and one unplanted CW as control unit. A stable hydraulic retention time of seven days was maintained in each CW. The organic loading rate was gradually increased in three phases in the CW fed with P. radiata leachate (i.e., from 12 to 19 g COD/m2/day) and with E. globulus leachate (i.e., from 14 to 40 g COD/m2/day). The operation of the six CWs lasted 98 days. The CW treating P. radiata and E. globulus leachate had a similar performance. The highest performance was obtained by the unplanted CW (approximately 10–20% higher than the planted CW), without significant differences observed between the P. radiata and E. globulus leachate treatment, regarding the removal efficiencies of organic matter and total phenolic compounds. The planted systems were probably affected by the high concentrations of these compounds applied, which probably created a toxic environment hindering the microbial community growth.

Substrate Organic Matter to Improve Nitrate Removal in Surface-Flow Constructed Wetlands

2007 ◽  
Vol 36 (1) ◽  
pp. 194-207 ◽  
Author(s):  
Michael R. Burchell ◽  
R. Wayne Skaggs ◽  
Charles R. Lee ◽  
Steven Broome ◽  
George M. Chescheir ◽  
...  
Keyword(s):  
Organic Matter ◽  
Constructed Wetlands ◽  
Nitrate Removal ◽  
Surface Flow ◽  
Surface Flow Constructed Wetlands

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.

Treatment of landfill leachate in on-site lagoons and constructed wetlands

1995 ◽  
Vol 32 (3) ◽  
pp. 129-135 ◽  
Author(s):  
T. Mæhlum
Keyword(s):  
Organic Matter ◽  
Constructed Wetlands ◽  
Landfill Leachate ◽  
Typha Latifolia ◽  
Free Water ◽  
Integrated System ◽  
Treatment System ◽  
High Tech ◽  
Leachate Treatment ◽  
Msw Landfill

On-site “high-tech” leachate treatment systems are often avoided due to large construction and operation costs. Alternative integrated methods need to be examined. This paper describes a biological treatment system, capturing leachate from a municipal sanitary waste (MSW) landfill on-site. The area has a typical cool temperate continental climate. The treatment system is built in a ravine and has been operating since July 1993. The average flow is estimated to be 120 m3 d−1. The low-strength leachate is first treated in a 400 m3 anaerobic pond. Stage 2 is a 4000 m3 aerated lagoon with 3 AIRE-O2 aspirator propeller aerators/mixers. Oxidation of organic matter, NH4-N and Fe take place in this lagoon. Stage 3 is two parallel constructed wetlands (CWs) with horizontal subsurface flow, each with an area of 400 m2. The filters consist of (i) washed gravel and (ii) Light Expanded Clay Aggregates, LECA (size range 10-20 mm). The CWs were planted with Phragmites australis and Typha latifólia. Stage 4 is a 2000 m2 free water surface CW, planted with Scirpus and Typha. The integrated system has no moving parts, except for the aerators. The overall removal of organic matter, N, P, Fe and pathogenes is promising (70-95%). The paper presents combinations with the use of conventional and natural systems in MSW landfill leachate treatment.

Performance of a Constructed Wetland Leachate Treatment System at the Chunchula Landfill, Mobile County, Alabama

1999 ◽  
Vol 40 (3) ◽  
pp. 67-74 ◽  
Author(s):  
Craig D. Martin ◽  
Keith D. Johnson ◽  
Gerald A. Moshiri
Keyword(s):  
Constructed Wetlands ◽  
Quality Standards ◽  
Surface Flow ◽  
Contaminated Groundwater ◽  
Effluent Water ◽  
Water Quality Standards ◽  
Leachate Treatment ◽  
Extreme Variability ◽  
Treatment And Disposal ◽  
Surface Flow Constructed Wetlands

Leachate poses a number of environmental problems. This is due primarily to the extreme variability of sources of this material, and, therefore, the heterogeneity of its composition. Operating and closed landfills generate leachate whose quality and quantity depend on how the landfill was constructed, operated and ultimately closed. Currently, a number of options exist for the containment and treatment of this type of wastewater. The methodology presented here utilizes surface-flow constructed wetlands for treatment and disposal of leachate and leachate-contaminated groundwater at the Chunchula, Alabama closed landfill. The final goal was to provide effluent water quality standards to conform to Federal National Pollution Discharge Elimination System (NPDES) guidelines.

IDENTIFYING THE MOST SUITABLE AREAS FOR SURFACE FLOW WETLAND CONSTRUCTION IN LITHUANIA

2015 ◽  
Author(s):  
Antanas DUMBRAUSKAS ◽  
Nijolė BASTIENĖ ◽  
Petras PUNYS
Keyword(s):  
Constructed Wetlands ◽  
Ecological Status ◽  
Surface Flow ◽  
Gis Analysis ◽  
Proximity Analysis ◽  
Wetland Construction ◽  
The Mean ◽  
Two Phases ◽  
Terrain Features ◽  
Surface Flow Constructed Wetlands

GIS-based approach to find the suitable sites for surface flow constructed wetlands was employed for the Lithuanian river basins with low ecological status. According to the nature of the analysed criteria the flowchart consists of two phases. Criteria used include hydrographical network, soil properties, terrain features, land use, etc. Some of them have strictly defined values (constraints), and other ranges within certain limits (factors). Limited criteria were analysed using rejection principle and influencing factors using proximity analysis and overlay methods. Selecting the potential sites using standard GIS analysis tools there was estimated about 3286 sites for possible wetlands with the mean area of inflow basin about 4 km2 in the basins of water bodies at risk.

Using Decomposition Kinetics to Model the Removal of Mine Water Pollutants in Constructed Wetlands

1994 ◽  
Vol 29 (4) ◽  
pp. 219-226 ◽  
Author(s):  
William J. Tarutis ◽  
Richard F. Unz
Keyword(s):  
Organic Matter ◽  
Constructed Wetlands ◽  
Mine Drainage ◽  
Term Treatment ◽  
Decomposition Kinetics ◽  
Dry Density ◽  
Organic Matter Concentration ◽  
Long Term Treatment ◽  
Input Variables ◽  
Reaction Stoichiometry

Although numerous mathematical models have been used to describe decomposition, few, if any, have been used to model the removal of pollutants in constructed wetlands. A steady-state model based on decomposition kinetics and reaction stoichiometry has been developed which simulates the removal of ferrous iron entering wetlands constructed for mine drainage treatment. Input variables for the model include organic matter concentration, reaction rate coefficient, porosity and dry density, and hydraulic detention time. Application of the model assumes complete anaerobic conditions within the entire substrate profile, constant temperature, no additional organic matter input, and subsurface flow only. For these ideal conditions, model simulations indicate that wetlands constructed with readily decomposable substrates rich in organic carbon are initially capable of removing far greater amounts of iron than wetlands built with less biodegradable substrates. However, after three to five years of operation this difference becomes negligible. For acceptable long-term treatment performance, therefore, periodic additions of decomposable organic matter will be required.

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