non-methane analysis Articles

  • Confirming Natural Attenuation Processes at a Coastal Site - Case Study

    Past waste disposal practices at a California coastal site resulted in a groundwater plume containing CVOCs (mainly chlorinated ethenes [CEs] and 1,1-dichloroethane) migrating offshore towards a marine harbor. CVOCs are present in the sediment porewater adjacent to the shoreline, but concentrations decreased significantly between 2000 and 2015, and NA in the marine sediments was suspected. To ...


    By SIREM

  • Applications of a Portable Gas Spectrometer

    In the realm of natural gas processing, enterprises don’t always find it economical to send products back to the lab and wait for test results. Being able to perform on-the-spot, highly accurate compositional analysis with gas chromatography equipment can reduce operational costs and help companies determine on-the-spot accurate gas levels in a natural gas stream. ...


    By Envent Engineering Ltd

  • Analysis of methane emissions from digested sludge

    The energetic use of sewage sludge is an important step in the generation of electricity and heat within a wastewater treatment plant (WWTP). For a holistic approach, methane emissions derived from anaerobic treatment have to be considered. Measurements show that methane dissolved in digested sludge can be analyzed via the vacuum salting out degassing method. At different WWTPs, dissolved ...


    By IWA Publishing

  • Mercury Analysis

    Characteristics of Mercury What is Mercury? Mercury is a naturally occurring silver-colored metallic element noted for its occurrence as a liquid at room temperature and toxic to living organisms. This silvery, opaque liquid metal is very dense, yet has a high surface tension that causes it to form tiny perfect spheres in the pores of the rocks it is found in. It is ...


    By HORIBA Europe GmbH

  • Mixture analysis using reverse searching and non-negative least squares

    The portable even handheld Raman spectrometer can provide adequate spectral resolution for material identification in situ. Raman spectra are information rich but not easy to interpret, especially for the spectra of mixtures. The ability to identify components in the mixture is, therefore, of considerable interest and challenge. In this study, a promising solution for rapid mixture identification ...


    By B&W Tek

  • Non-destructive analysis of concrete for corrosion studies using nuclear technique

    Chloride-induced reinforcement corrosion is the principal cause of deterioration of concrete structures in the Arabian Gulf and the world over. Preventive measures against corrosion require maintaining the chloride and sulphate concentration in concrete below the threshold limits specified by the standards. This requires monitoring the chloride and sulphate concentration in concrete, and a ...


    By Inderscience Publishers

  • Gaming in a benchmarking environment. A non-parametric analysis of benchmarking in the water sector

    This paper discusses the use of benchmarking in general and its application to the drinking water sector in particular. It systematizes the various classifications of performance measurement, discusses some of the pitfalls of benchmark studies and provides some examples of benchmarking in the water sector. After a presentation of the institutional framework of the water sector in the Belgian ...


    By IWA Publishing

  • Productivity and efficiency analysis in presence of pollution: a review of non–parametric methods

    During the past 20 years, a rising interest in environmental protection and in the sustainability of production processes has stimulated scientific research to create indicators of efficiency and productivity that is able to consider undesirable outputs. The number of papers written is impressive, as well as the number of proposed techniques. The researchers and practitioners face great ...


    By Inderscience Publishers

  • An analysis of the correlation between the non-cancer morbidity of children and the internal dose of 137Cs

    This paper sets out to accomplish the following: (i) to define the relationship of child morbidity of the digestive system with the low radiation internal dose, taking into account the environmental landscape-geochemical conditions of residence territory and the age peculiarities of children, (ii) to select groups composed of children 0-14 years old and who live in analogical environmental and ...


    By Inderscience Publishers

  • Analysis of gamma ray incoherent scattering for non-destructive testing

    An approach for the analysis of gamma ray incoherent scattering on free and binding electrons is presented for Non-destructive Testing (NDT). The method is based on computational simulation and backscattering gamma ray measurements for carbon steel walls. The results of thickness measurements for steel walls are described by the theory of the energy transfer model.Keywords: gamma ray incoherent ...


    By Inderscience Publishers

  • Faecal sterols analysis for the identification of human faecal pollution in a non-sewered catchment

    In this study, faecal sterols were used to identify human faecal pollution in a non-sewered catchment in Southeast Queensland, Australia. In all, 36 water samples were collected from six sites on six occasions and the concentration of sterols were determined using gas chromatography and mass spectrometry. The stanols concentration in water samples generally increased with increased catchment ...


    By IWA Publishing

  • Advanced gas analysis - on the go

    The field of ambient air analysis - monitoring industrial and other environments for harmful concentrations of gases - has traditionally faced a technology limitations: Would you prefer a complete and reliable tool, which will be bulky, complicated and inconvenient? Or would you like a nice portable one that's simple and lightweight, but unreliable and limited in its capability? Truly complete ...


    By HHCS Handheld USA Inc.

  • Microscopic Particulate Analysis

    Introduction In 1989 the EPA promulgated the Surface Water Treatment Rule (SWTR) in response to the 1986 Amendments to the Safe Drinking Water Act (SDWA). The overall goal of the SWTR is to protect consumers from pathogens. The SWTR recommends a multiple-barrier approach including source water protection, filtration and disinfection when surface water is used as source water for drinking. ...


    By Analytical Services, Inc

  • Automating oil particle analysis

    Run up to 25 samples at one time The major issue for premature failure in wind turbine gearboxes is bearing failure, which leads to gearbox failure. A wind turbine gearbox will not survive if the oil is ...


    By Spectro Scientific

  • Mid-infrared analysis of biodiesel

    The biodiesel industry is growing rapidly. and so is the need for analysis 10 ensure quality product and keep biodiesel in good standing. Biodiesellhat has residual glycerin, glycer· ides, or inorganic salts from the production process can cause problems such as Iilter plugging and injector coking in a diesel engine. The biodiesel blend ralio also can affect cold weather performance, lax ...


    By Spectro Scientific

  • Analysis of availability and accessibility of hydrogen production: An approach to a sustainable energy system using methane hydrate resources

    It is considered that use of hydrogen as an energy source may contribute to environmental improvement and provide an alternative energy system. Moreover, it is anticipated that hydrogen will be in great demand in the near future for use in such vehicles as fuel cell-based cars. Research and development of a number of advanced methods of hydrogen production (OTEC, water photolysis using a ...


    By Springer

  • Methane emissions reduction from organic wastewater and solid waste co-composting: parameter estimation and sensitivity analysis

    Using the approved large scale methodology AM0039 and approved baseline methodology AM0010, an estimated 7,329.04 tCO2e/yr are typically generated from degradation of organic wastes at the landfill in Mauritius. Baseline emissions for anaerobic degradation of organic wastewaters (OWW) in open lagoons approximated to 36,036 tCO2e/yr; 402,783.92 tCO2e/yr for transportation of OWW and municipal ...


    By Inderscience Publishers

  • Economic Analysis of Environmental Externalities

    ' Economic analysis of pollution prevention and abatement measures requires estimating the potential benefits from controlling pollution as well as the better-known costs of new equipment or processes. This note discusses the economic analysis of environmental externalities, using a wide range of valuation techniques.' Industrial activities often produce various pollutants; these include air and ...


    By The World Bank

  • Balefill Slope Stability Analysis

    The unique ability of SVSlope to search for the most critical slip surface has application in the area of balefill slope stability analysis. In a balefill, the incoming waste stream is compacted into rectangular bales prior to landfilling. Balefills are operated separately from landfills, where the incoming waste is usually condensed in-situ by compactors. The study outlined in this article ...


    By SoilVision Systems Ltd.

  • Monitoring And Analysis of Landfill Gases

    CoGDEM is the trade association representing manufacturers and service providers who are active in the field of gas detection instrumentation and environmental monitoring apparatus. Crowcon Detection Instruments Ltd was one of the founding members of CoGDEM, and in this article their Product Manager of Fixed Systems, Andy Avenell, gives an update on Landfill Gas. Landfill is by far the most ...

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