Methane (CH4) Monitoring Articles

  • Fracking & Shale Gas

    Unconventional natural gas production (shale gas) by hydraulic fracturing - Quantification of the Environmental Footprint Due to the global decline of fossil energy reserves and resources, unconventional natural gas production has become increasingly important in the last decade. In this context, unconventional natural gas production means the production of shale gas, tight ...


    By thinkstep

  • Three dimensional digital analysis of 2,500 square kilometers of gravity and magnetic survey data, Bellefontaine Outlier area, Ohio

    Introduction The Bellefontaine Outlier area is a highland region of flat lying Devonian age rocks capped by varying amounts of glacial till. The area is entirely surrounded by a topographically flat and heavily glaciated area of flat lying older Silurian age rocks. The Outlier highlands also contains the highest point in Ohio, Campbell Hill, (1,549ft) which has an elevation 40 feet above it ...


    By RockWare, Inc.

  • Axetris achieves Silver Gas Award 2013

    Here the original text from G&I: „The Axetris AG LGD F200 self-contained laser gas detector module is designed for integration by original equipment manufacturers (OEMs) of selective catalytic reduction (SCR) systems and monitoring equipment and is based on proprietary technology- enhanced tuneable diode laser spectrometry. The OEM module can measure concentrations from well under ...


    By Axetris Ag

  • Quantification of leakage in batch biogas assays

    Avoiding leaks is essential for accurate measurement of biogas production by batch assays. Here we present a simple method for detecting leaks and correcting results, based on the change in bottle mass during incubation. Three experiments were carried out using pure chemicals, wastewater sludge, and other complex substrates to test and demonstrate the method, and leaks were detected in all ...


    By IWA Publishing

  • Do you need to rapidly analyse Coltan?

    The need for a rapid, simple analysis (carried out by non-laboratory staff) at mines makes a handheld X-ray analyser the ideal analytical technique for analysis of Coltan. The solution Hitachi High-Tech’s X-MET8000 Expert Geo provides fast and accurate on-site analysis of a wide variety of mining sample types, such as drill cores, rocks, cuttings and powders. Results ...

  • Mechanism of 1,4-dioxane microbial degradation revealed by 16S rRNA and metatranscriptomic analyses

    1,4-Dioxane (dioxane), a probable human carcinogen, often exists in industrial wastewater and domestic sewage. In this study, we applied 16S rRNA and metatranscriptomic methods to analyze the dioxane biodegradation mechanism by activated sludge. Tetrahydrofuran (THF) was added as an essential co-metabolite to promote the degradation of dioxane. We found the dioxane removal ratio increased with ...


    By IWA Publishing

  • Good servant, bad master: sulfide influence on partial nitritation of sewage

    When applying partial nitritation (PN) to anaerobically pre-treated sewage, ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) will be exposed to dissolved sulfide and methane. Both sulfide and methane may inhibit nitrification. To gain knowledge necessary for sustaining PN under these conditions, we exposed an AOB enrichment and a mixed nitrifying culture to dissolved ...


    By IWA Publishing

  • Application note issue #5 - Cement Analysis August 2017

    Cement analysis using FP program (Fundamental Parameters) Cement is a blend of several minerals. It is critical to control the elemental composition and properties such as strength, setting, time and color. ED-XRF is being used to analyze the raw components, raw meal, clinker, and the final cement product (Na, Mg, Al, ...


    By Xenemetrix Ltd.

  • Quantitative analysis of iron in flour

    Abstract   A quantitative analysis of Iron in flour via Xenemetrix EDXRF Laboratory Spectrometer System was performed by model EX-3600M. The minimum detection limit for Fe in flour matrix was determined to 0.8 ppm at 3 sigma. Objective  To design an easy method by using EDXRF technique for quick and convenient measurements of Fe in flour at the level ...


    By Xenemetrix Ltd.

  • Analysis of precious metals in jewelry

    Abstract For thousands of years, man learned the craft of making jewelry from gold. Gold is a noble metal which does not react with the air and has a shiny yellow color.Over the years, alloying of the gold was necessary to improve its properties since pure gold is too soft to be used for jewelry. Alloying of the gold is usually by low-cost metals such as copper, zinc, silver or nickel. ...


    By Xenemetrix Ltd.

  • Sanitation value chains in low density settings in Indonesia and Vietnam: impetus for a rethink to achieve pro-poor outcomes

    This study examined the sanitation hardware supply chain in rural, low density settings in Indonesia and Vietnam. Actual costs along the chains were investigated to understand the challenges and opportunities to support affordable sanitation in remote, rural locations. Data were collected from four remote districts in Indonesia and Vietnam through a systematic value-chain analysis comprising ...


    By IWA Publishing

  • Velocity-based analysis of sediment incipient deposition in rigid boundary open channels

    Drainage systems must be designed in a way to minimize undesired problems such as decrease in hydraulic capacity of the channel, blockage and transport of pollutants due to deposition of sediment. Channel design considering self-cleansing criteria are used to solve the sedimentation problem. Incipient deposition is one of the non-deposition self-cleansing design criteria that can be used as a ...


    By IWA Publishing

  • Multi-objective performance assessment of wastewater treatment plants combining plant-wide process models and life cycle assessment

    Multi-objective performance assessment of operational strategies at wastewater treatment plants (WWTPs) is a challenging task. The holistic perspective applied to evaluation of modern WWTPs, including not only effluent quality but also resource efficiency and recovery, global environmental impact and operational cost calls for assessment methods including both on- and off-site effects. In this ...


    By IWA Publishing

  • Use of non-linear mixed-effects modelling and regression analysis to predict the number of somatic coliphages by plaque enumeration after 3 hours of incubation

    The present study aimed to establish the kinetics of the appearance of coliphage plaques using the double agar layer titration technique to evaluate the feasibility of using traditional coliphage plaque forming unit (PFU) enumeration as a rapid quantification method. Repeated measurements of the appearance of plaques of coliphages titrated according to ISO 10705-2 at different times were ...


    By IWA Publishing

  • Trend analysis of time series rainfall data using robust statistics

    A temporal rainfall analysis was carried out for the study area, Rajahmundry city located in lower Godavari basin, India, during the period 1960–2013. Both the parametric and non-parametric approaches were envisaged for identifying the trends at different temporal scales. Linear and robust regression analysis revealed a negative trend at weekly scale during monsoon months, but failed to ...


    By IWA Publishing

  • An efficient method to improve the production of methane from anaerobic digestion of waste activated sludge

    Methane production from waste activated sludge (WAS) anaerobic digestion is always low due to slow hydrolysis rate and inappropriate ratio of carbon to nitrogen (C/N). In this work, a novel approach, i.e., co-digestion of WAS and tobacco waste (TW) using ozone pretreatment, to greatly enhance the production of methane is reported. Experimental results showed the optimal C/N and ozone dosage ...


    By IWA Publishing

  • Multi-objective optimization of transient protection for pipelines with regard to cost and serviceability

    Transient protection is an important issue in pipeline design. As protective devices impose a huge cost on the project, it is better and more efficient to use optimization models for determination of their position and type with the aim of cost reduction. Except for the cost, the other important issue in obtaining the number and locating of protective devices is the consideration of important ...


    By IWA Publishing

  • Biotic manganese oxidation coupled with methane oxidation using a continuous-flow bioreactor system under marine conditions

    Biogenic manganese oxides (BioMnOx) can be applied for the effective removal and recovery of trace metals from wastewater because of their high adsorption capacity. Although a freshwater continuous-flow system for a nitrifier-based Mn-oxidizing microbial community for producing BioMnOx has been developed so far, a seawater continuous-flow bioreactor system for BioMnOx production has not been ...


    By IWA Publishing

  • Gas composition of sludge residue profiles in a sludge treatment reed bed between loadings

    Treatment of sludge in sludge treatment reed bed systems includes dewatering and mineralization. The mineralization process, which is driven by microorganisms, produces different gas species as by-products. The pore space composition of the gas species provides useful information on the biological processes occurring in the sludge residue. In this study, we measured the change in composition ...


    By IWA Publishing

  • How to choose detectors in the dangerous cargo warehouse

    The principle of choosing toxic gas and combustible gas detectors in dangerous cargo warehouse: 1.Dangerous cargo warehouse detection of gas mainly including combustible or toxic. Measurement of the type of gas characteristics, the first is to measure the explosion, second is the measurement of toxicity. The so-called measuring explosion is the detection of combustible gases, such as ...

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