scale degrading Articles

  • Intensification of sonochemical degradation of phenol using additives at pilot scale operation

    The present work reports the use of sonochemical reactors for the degradation of phenol in the presence of additives with an objective of enhancing the rates of degradation at a pilot scale operation. Process intensification studies have been carried out using additives such as hydrogen peroxide (H2O2) (0.5–2.0 g/L), sodium chloride (0.5–1.5 g/L) and solid particles viz. cupric oxide (CuO) and ...


    By IWA Publishing

  • Rapid Chemical Degradation Of Munitions Constituents

    PLANTECO Environmental Consultants, LLC is registered as an 8(a), Hubzone, SDB in the United States Central Contractor Registration (CCR). PLANTECO is recognized as a leader in providing sustainable technology consulting and engineered green remediation product applications. Dr. Valentine Nzengung, president of PLANTECO, has recently developed MUNOX®, a rapid in-situ chemical treatment process ...


    By Planteco, Inc

  • Using full-scale duckweed ponds as the finish stage for swine waste treatment with a focus on organic matter degradation

    The rapid increase in the number of swine has caused pronounced environmental impacts worldwide, especially on water resources. As an aggregate, smallholdings have an important role in South American pork production, contributing to the net diffusion of pollution. Thus, duckweed ponds have been successfully used for swine waste polishing, mainly for nutrient removal. Few studies have been ...


    By IWA Publishing

  • Land degradation in developing countries: what is the problem?

    Based on a review of case studies from developing countries this paper argues that global assessments of land degradation should be interpreted with care. On the one hand, degradation is not a linear process that can easily be measured by static parameters. Positive environmental outcomes are often linked to the process of land use intensification, an outcome that depends on an interplay among ...


    By Inderscience Publishers

  • Evaluation of Aerobic and Anaerobic Degradation of Pentachlorophenol in Groundwater (PDF)

    Bench-scale laboratory tests were conducted to evaluate and compare the enhanced bioremediation of pentachlorophenol (PCP) in groundwater under anaerobic and aerobic conditions. While tests under both conditions showed a significant reduction of PCP over the 3-month test period (greater than 90 percent reduction compared to 40 percent in controls), removal to concentrations below the 10 μg/L ...


    By REGENESIS

  • Anaerobic degradation of carbon capture reclaimer MEA waste

    The anaerobic biodegradation of reclaimer MEA (monoethanolamine) waste (MEAw) with easily degradable co-substrates was investigated in a laboratory-scale bioreactor at room temperature during a 160 d experimental run. The reactor that was constructed with three phases to facilitate attached biofilm and suspended biomass retention for degradation of the complex and challenging MEAw performed ...


    By IWA Publishing

  • Degradation of biodegradable plastics under controlled composting conditions

    The management of solid waste is a growing concern in many countries. Municipal solid waste is a major component of the total solid waste generated by society, and the fraction of municipal solid waste made up of plastic materials continues to increase. The composting of plastic materials along with organic wastes will help society to usefully recycle more of its solid waste and divert it from ...


    By ORBIT e.V.

  • Scaling-up investments in natural infrastructure

    Wetlands occur wherever water meets land. These deltas, marshes, rivers, lakes and watersheds are the water systems that link the natural world and human societies, and make it possible to clean, store and provide water to grow food and run businesses. As we prepare to participate in ...


    By Wetlands International

  • Changes in geotechnical properties of Municipal Solid Waste (MSW) in bioreactor landfill with degradation

    The objectives of the research described in this paper are to: study the composition of fresh Municipal Solid Waste (MSW); study the effects of decomposition on physical characteristics of MSW in bioreactor landfill. Initially, composition of the fresh MSW constituents was determined based on 14 bag MSW samples. Then, four small-scale bioreactor landfills were simulated in laboratory and samples ...


    By Inderscience Publishers

  • Estimation of the contribution to air-quality degradation in Athens from major elevated sources

    The dispersion of air pollutants released from the major elevated sources in the Attica Peninsula has been studied extensively. An attempt was made to estimate average concentrations for some non-reactive air pollutants. These estimates were made with a two-way interactive nesting, prognostic model, RAMS, a Lagrangian particle dispersion model, LPDM, and a synoptic classification scheme developed ...


    By Inderscience Publishers

  • Mineral oil bio-degradation within a permeable pavement: long term observations

    ABSTRACTThe paper reports on the first 300 days of a research project conducted at Coventry University, which has focused on the ability of a permeable pavement, reservoir structure to retain and treat petroleum-derived pollutants through in situ microbial bio-degradation. The research has required the construction of a full-scale model permeable pavement in the laboratory, which has been ...


    By IWA Publishing

  • Degradation of organic matter from domestic wastewater with loofah sponge biofilm reactor

    A laboratory-scale oxic biofilm reactor using loofah sponge as support material was carried out to study its start-up characteristics and the optimum operation parameters in removing organic matter and nitrogen from domestic wastewater. It took no more than 10 days to complete microbiological cultivation and acclimation, indicating that the natural loofah sponge was a superior support material ...


    By IWA Publishing

  • Experimental design optimization for electrochemical removal of gentamicin: toxicity evaluation and degradation pathway

    Electrochemical degradation of gentamicin was achieved using a laboratory scale electrochemical reactor by optimizing pH, current density and treatment time. A two step statistical optimization was performed as per factorial design and center composite design (CCD). A Pareto chart was used for selecting statistically significant effects and an analysis of variance (ANOVA) table indicated ...


    By IWA Publishing

  • Remote sensing of land degradation: experiences from Latin America and the Caribbean

    Received for publication April 6, 2009. Land degradation caused by deforestation, overgrazing, and inappropriate irrigation practices affects about 16% of Latin America and the Caribbean (LAC). This paper addresses issues related to the application of remote sensing technologies for the identification and mapping of land degradation features, with special attention to the LAC region. The ...

  • Radar remote sensing of wind-driven land degradation processes in northeastern Patagonia

    Received for publication February 27, 2009. Wind-driven land degradation negatively impacts on rangeland production and infrastructure in the Valdes Peninsula, northeastern Patagonia. The Valdes Peninsula has the most noticeable dunefields of the Patagonian drylands. Wind erosion has been assessed at different scales in this region, but often with limited data. In general, terrain features caused ...

  • Oxidative degradation of signature compounds and TOC reduction using advanced oxidation processes

    ESCO International; a company specialising in Advanced Oxidation Processes, Ozone and UV systems and with the primary objective of resolving water pollution issues on a global scale, worked on a semi-pilot scale project with an internationally well-known company in the chemical & polymers production industry, based in US. Organic compounds of concern include BI, MI, BPA, HEG and NPI ...


    By ESCO International

  • Electrochemical removal of pentachlorophenol in a lab-scale platinum electrolyzer

    This study is focused on the removal of pentachlorophenol from its aqueous phase by electrochemically induced degradation with Pt electrodes. The objective of this study was to contrast the electrochemical removal of pentachlorophenol at the oxidative and the reductive potentials, and further to understand how to apply the electrochemical treatment on PCP degradation. Lab experiments were ...


    By IWA Publishing

  • Chemical and toxicological assessment of a full‐scale biosolid compost

    The impact of a full‐scale biosolid composting plant on the fate of a broad range of priority organic pollutants was investigated. Chemical analysis was performed at different steps of the process during two seasons. Simultaneously, the toxicological quality was assessed using estrogen α‐, dioxin‐, and pregnane X‐receptor reporter cell lines. Mass‐balance calculation highlighted the removal of ...


    By John Wiley & Sons, Ltd.

  • Spatially distributed lateral nitrate transport at the catchment scale

    Received for publication January 23, 2009. In river catchments, N transformation and storage processes during lateral transport are important in controlling N loads of surface waters. There is a lack of approaches which capture lateral flows and associated N transformation in a spatially distributed way. The aim of this paper is to develop a new conceptual N transport and transformation model ...

  • Soil and water: towards a larger-scale perspective of their relations

    Land use changes over time have altered relations between soils and water cycles throughout Europe. There are regions where forests were cut for agriculture or herding, or for industrial, mining, and/or railroad use. Soils were lost, through mud floods, and the water cycles changed so that their present status is one of badlands and/or desert-like areas. Early stages in the path to degradation ...

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