dry-colorimetric method Articles

  • A colorimetric microwell method for determining bromide concentrations

    Bromide is commonly used as a tracer in studies of water and chemical transport in soil and rock because it is relatively nonreactive with soil and rock constituents and because of its low environmental background concentrations. Based on a largely ignored modification of an American Public Health Association standard colorimetric method for determining Br– using phenol red and chloramine-T(CT), ...

  • Water management solutions minimize flood damage

    Human societies around the world have used timber as a building material for thousands of years. As wood is the only significant biological building material we are naturally inclined to believe that using wood in construction is good for the environment. As a matter of fact the environmental benefits of using timber are not straightforward: although it is a natural product, a large amount of ...


    By Geoplast US Corp.

  • Data Centre CRAC unit efficiency improvements

    One of the main types of project Munters look at is energy efficiency improvements within the thermal management side. One of the easiest changes that can be made is swapping out the old AC powered motors for EC powered impellors. the reductions in energy is considerable, with some older belt drive unit changes measuring a saving of over 60% this is due to the design of the new impellors and the ...


    By Munters

  • Maintenance To-Do: Coil Cleaning

    A coil-cleaning program should be an integral part of maintaining some kinds of process cooling equipment. Most people think of coil cleaning as a building or facility prepares to turn on the air-conditioners for another season. Admittedly, spring is a perfect time to put such cleaning and maintenance at the top of the to-do list. Condenser and evaporator coils are an integral part of HVAC ...


    By Evapco Inc.

  • Sludge Drying Overview - Treatment Methods and Applications

    Sludge is a residual, semi-solid by-product left from industrial or refining processes. It is a separated solid suspended in a liquid, typically containing major quantities of interstitial water between its solid particles.  This material can be dried to cut its volume and reduce most of the moisture content of the biosolids present in the sludge. ...


    By IWA Publishing

  • Biosolids- Considering the Types, Applications and Biosolids Drying Methods

    While some water treatment plants are meant to simply make the sludge safe enough to dispose of, most facilities continue to treat the sludge so that the material can be put to good use in their communities. Once sludge is treated and processed to meet EPA safety standards for productive use, the resulting nutrient-rich organic material is termed as biosolids. ...


    By IWA Publishing

  • Assessment of Interpolation Methods For EFAS

    The observed meteorological inputs for the European Flood Alert System (EFAS) have been analysed. Observed sources are: 1) Grid and Station data collected from the MARS-STAT data base, 2) high resolution rainfall and mean temperature data covering Germany and upper Danube (HR). Several interpolation methods have been calibrated and cross validated. The comparisons of the different interpolated ...


  • The mtt [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay is a fast and reliable method for colorimetric determination of fungal cell densities

    The entomopathogenic fungus Neozygites parvispora (Entomophthorales: Zygomycetes) grows in vitro as irregularly rod-shaped hyphal bodies in a complex medium. In order to simplify the medium composition and determine growth-promoting compounds for the cultivation of this fungus, we were looking for a rapid and quantitative method to estimate the number of living ...

  • Solar drying of sewage sludge - An old method with modern technology using Wendewolf®

    Any Sewage Water Work throughout the world will produce sludge, a form of biomass growing in the basins. This biomass has to be evacuated and is, generally speaking difficult to handle! When liquid it has a dry matter of 3 to 4 %, or only 30 to 40 kg per ton of sludge, when mechanically dehydrated to 20 - 25 % most of it is still water, as an average  750 to 800 kg per ton of filter cake. ...


    By IST-Anlagenbau GmbH

  • Environmental assessment of different dewatering and drying methods on the basis of life cycle assessment

    Sewage sludge is an inevitable product of wastewater treatment in municipal wastewater plants and its amount has increased dramatically due to the growing number of sewage systems users. This sludge needs to be adequately treated in order to decrease its hazardous properties and any negative influence on the environment. In this paper, gate to gate analysis, on the basis of life cycle assessment ...


    By IWA Publishing

  • Accepted Inspection Methods of Process Sewers.

    During the process of refining there is discharge of hazardous waste, this coupled with aging pipeline infrastructure creates a potential where waste can leak into the environment posing catastrophic threats to life. Federal agencies such as the EPA are beginning to penalize refineries that do not take necessary measures of disposing their waste. These refineries are subject to ...


    By EnTech Engineering, Inc

  • Highly sensitive colorimetric determination of malathion using gold nanoparticles

    A highly sensitive method is presented for the colorimetric determination of malathion using gold nanoparticles (AuNPs). In this approach, the synthesized AuNPs solution was stabilized by the citrate anions as their repulsion protected the AuNPs from aggregation. The synthesized AuNPs were characterized morphologically by using transmission electron microscopy technique. Malathion caps the ...


    By IWA Publishing

  • AuNP‐based colorimetric aptasensor for rapid detection of six organophosphorus pesticides

    Fast immunoassay‐based screening methods are unavailable for most of small‐molecule pesticides due to lack of immunogenicity and the difficulty in obtaining antibodies by animal immunization. Aptamers are single‐stranded DNAs selected through an in vitro process, which can bind to any target including non‐immunogenic small molecules with high affinity and specificity. Though various ...


    By John Wiley & Sons, Ltd.

  • Four Methods to Measure TAN/TBN in Lubrication Oil

    TOTAL ACID NUMBER A high concentration of acidic compounds in a lubricant can lead to corrosion of machine parts and clogged oil filters due to the formation ...


    By Spectro Scientific

  • The Molding Methods of Desulfurization Gypsum Ball Press Machine

    At present, according to the molding methods, desulfurized gypsum ball press machine can be divided into two types, which will be explained by Kefan Machinery in the following: (1) Desulfurization gypsum ball press machine presses the materials relying on the cohesion of the particles, such as disk pelleting ...

  • Quantification of sewer leakage by a continuous tracer method

    Water authorities interested in the evaluation of the structural state of a sewer must quantify leakage to plan strategic intervention. However, the quantification of the exfiltration and the localisation of structural damage are challenging tasks that usually require expensive and time-consuming inspections. Herein, we report one of the first applications of the QUEST-C method to quantify the ...


    By IWA Publishing

  • Comparison of four methods to assess biofilm development

    Two nondestructive methods of biofilm quantification (optical density via a flatbed scanner and biofilm thickness) have been evaluated and compared to two destructive methods (Crystal Violet staining after biofilm disintegration and dry weight). The methods were tested on biofilms that developed on a modified rotating biological contactor (RBC) that was inoculated with urban wastewater and fed ...


    By IWA Publishing

  • The Method Found In A Sewage Sludge Carbonization Treatment Plant

    Have you ever passes a wastewater treatment plant and wondered exactly how the process works? Most localities have a minimum of one sewage sludge carbonization plant. These plants are the places where municipal sewage sludge is treated. This process is split into three stages. Each stage was created to further decompose and disintegrate wastewater sludge. ...


    By Beston Group

  • CoirGreen™ Geotextiles - An Effective Soil Erosion Prevention Method

    “The different coir types and their characteristics have made coir the most versatile natural fiber ...


    By CoirGreen

  • Efficiency analysis of hydrogen production methods from biomass

    Hydrogen is considered as a universal energy carrier for the future, and biomass has the potential to become a sustainable source of hydrogen. This article presents an efficiency analysis of hydrogen production processes from a variety of biomass feedstocks by a thermochemical method – gasification as well as biochemical methods – fermentation and anaerobic digestion. The exergetic ...


    By Inderscience Publishers

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