Journal of Environmental Engineering: Recent submissions
Now showing items 1041-1060 of 6477
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Rates of Sulfate Reduction Achieved in Columns Based on Untreated Sugarcane Bagasse for Metals Removal
(American Society of Civil Engineers, 2018)Groundwater contamination by mining effluents and spills at industrial sites often involves toxic metals and sulfate. Passive remediation systems, such as permeable reactive barriers, are attractive alternatives to traditional ... -
Site Selection for Hydropower Development: A GIS-Based Framework to Improve Planning in Brazil
(American Society of Civil Engineers, 2018)Small hydropower plants (SHPs) may be considered the most cost-effective and environmentally benign technology for energy production. However, it has been suggested that the social–environmental impacts of SHPs could be ... -
Electroplating Wastewater Concentration System Utilizing Mechanical Vapor Recompression
(American Society of Civil Engineers, 2018)Electroplating wastewater must be properly treated before being discharged to the environment. A new type of evaporation system, called mechanical vapor recompression (MVR), was designed and studied in this paper. A series ... -
Soil Osmotic Potential and Its Effect on Vapor Flow from a Pervaporative Irrigation Membrane
(American Society of Civil Engineers, 2018)Pervaporative irrigation is a membrane technology that can be used for desalination and subsurface irrigation simultaneously. To irrigate, the tube-shaped polymer membrane is buried in soil and filled with water. Because ... -
Water Quality and Hydrologic Performance of a Regenerative Stormwater Conveyance in the Piedmont of North Carolina
(American Society of Civil Engineers, 2018)Regenerative stormwater conveyance (RSC) is an open-channel, sand-filtering system composed of a series of shallow aquatic pools, riffles and weirs, native vegetation, and underlying media beds. Surface runoff entering a ... -
Improving Anaerobic Digested Sludge Dewaterability through Gamma-Ray Irradiation and Struvite Precipitation
(American Society of Civil Engineers, 2018)Anaerobic digestion is a generally used microbial process in wastewater treatment plants, and anaerobic digestion sludge often possesses unacceptable characteristics including high resistance to solid-liquid separation and ... -
Modeling Adsorption Isotherm for Defluoridation by Calcined Ca-Al-(NO3)-LDH: State-of-the-Art Technique
(American Society of Civil Engineers, 2018)The calcined Ca-Al-(NO3) layered double hydroxide (LDH) was synthesized by a coprecipitation method and was applied for the adsorptive removal of fluoride from the aqueous solution. The isotherm experiments were conducted ... -
Mechanical and Leaching Behavior of a Stabilized and Solidified Anthracene-Contaminated Soil
(American Society of Civil Engineers, 2018)This paper presents an investigation into the remediation of an anthracene-contaminated clay soil through experimental tests. Samples were prepared of uncontaminated and contaminated soil-cement with 20 and 30% cement. ... -
Optimization of Biological Nitrogen Removal over Nitrite in the Presence of Lipid Matter by Regulation of Operational Modes
(American Society of Civil Engineers, 2018)Optimization of total nitrogen (TN) removal via the nitrite path was studied at a sequential batch reactor (SBR) from anaerobic reject water (ARW) with a content of slowly degrading organic matter of lipid structure. The ... -
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(American Society of Civil Engineers, 2018) -
Evaluation of Reaeration by Convective Heat Transfer Coefficient
(American Society of Civil Engineers, 2018)The reaeration-rate coefficient (K2) is an essential parameter in water quality simulation because it aids predicting the water’s ability to assimilate organic pollutants. Several methods have been used to determine K2, ... -
Parameterization Study for Modeling Biosurfactant-Enhanced Aquifer Remediation Processes Based on Flow Cell Experiments
(American Society of Civil Engineers, 2018)Applications of biosurfactant in enhanced aquifer remediation processes have been widely studied. In order to clarify the significant parameters and analyze their interactions, and thus be able to describe the processes ... -
Organic Compounds and Phosphorus Removal from Dairy Wastewater by Biofilm on Iron-Containing Supports
(American Society of Civil Engineers, 2018)This study investigated treatment of dairy wastewater in one-stage anaerobic moving biofilm reactors (AMBRs) at ambient temperature. To support biological treatment with abiotic processes (iron corrosion), metallic iron ... -
Dewaterability of CAS and MBR Sludge: Effect of Biological Stability and EPS Composition
(American Society of Civil Engineers, 2018)The dewaterability of sludge from two conventional activated sludge (CAS) and three membrane bioreactor (MBR)–based wastewater treatment plants is investigated prior to and after anaerobic digestion. The concentration and ... -
Impact of Temperature-Dependent Reaction Rates on Methane Yields in Intermittently Fed Mesophilic Sludge Digestion
(American Society of Civil Engineers, 2018)Efficient anaerobic digestion (AD) of sludge is crucial for the overall energy balance, minimization of carbon footprint, and the economy for most wastewater-treatment plants (WWTPs). In recent years, intermittent feeding ... -
Longitudinal Hillslope Shape Effects on Runoff and Sediment Loss: Laboratory Flume Experiments
(American Society of Civil Engineers, 2018)Catchment geomorphology is one of the most important factors governing runoff and erosion. However, its complexity is difficult to describe accurately; thus, for simplicity, many studies assume hillslopes with a uniform ... -
Effect of Adsorbate Concentration to Adsorbent Dosage Ratio on the Sorption of Heavy Metals on Soils
(American Society of Civil Engineers, 2018)Adsorbent dosage and initial adsorbate concentration are usually used as two factors for a batch sorption experiment to investigate the sorption characteristics of heavy metals on soils. In the present study, another factor ... -
CFD as a Tool to Optimize Aeration Tank Design and Operation
(American Society of Civil Engineers, 2018)In a novel development on previous computational fluid dynamics studies, the work reported here used an Eulerian two-fluid model with the shear stress transport k–ω turbulence closure model and bubble interaction models ... -
Characterization of Dissolved Organic Matter in Mature Leachate during Ammonia Stripping and Two-Stage Aged-Refuse Bioreactor Treatment
(American Society of Civil Engineers, 2018)Dissolved organic matter (DOM) is the major regulated pollutant of landfill leachate in solid waste management industries. Recently, aged-refuse bioreactor (ARB) has received increasing attention for reduction of DOM from ... -
Performance of an Earthworm-Based Biological Wastewater-Treatment Plant for a Dairy Farm: Case Study
(American Society of Civil Engineers, 2018)Earthworms have been in existence for approximately 600 million years and have adapted to toxicity. They may help cleaning wastewater by devouring micro-organisms. Although the performance of earthworm-based ...