measuring total dissolved solids Articles

  • Total Dissolved Solids (TDS) Measurement

    Definition Total Dissolved Solids (TDS) is a measure of the sum of all inorganic and organic substances in a liquid in molecular, ionized or micro-granular colloidal suspended form. The solids must be small enough to survive filtration through a sieve the size of two micrometer.  TDS solids are normally found in all freshwater systems. Major applications of TDS are: at low levels the ...


    By IC Controls Ltd.

  • Dissolved Solids and Water Purification

    To make drinking water palatable, the level of dissolved substances (TDS) can’t be too high, but it also can’t be too low Water quality metrics are needed to ensure that surface and groundwater – common sources of water for human consumption – are free from contaminants and pollutants. The level of dissolved solids, also commonly referred to as total ...


    By Fluence Corporation

  • How to identify issues in water quality

    Water quality can mean different things to different people and therefore depends on what standard of quality one is looking for, for example, water may be fine for fish to live in but lack the quality required for human consumption. To measure the quality of water accurately, tests are carried out to identify several key indicators. These characteristics are then compared ...


    By Aquaread Limited

  • What are the main indicators of water quality?

    “Water is the driving force of all nature;” so said Leonardo da Vinci. The survival of our planet depends on the availability of water and the condition that it is in. It is therefore vital to make sure that it is able to provide a hospitable environment for those that live in it, and is free from harmful levels of substances for those that drink it. Not ...


    By Aquaread Limited

  • Boiler Dissolved Oxygen Control

    DISSOLVED OXYGEN CHEMISTRY Dissolved Oxygen (DO) is a measure of the amount of oxygen, usually thought of as a gas, that is dissolved in a liquid such as water. Oxygen is essential to life and is also the most common element found taking part in corrosion reactions. DO can be thought of as the fuel needed for the corrosion process to proceed. It is the corrosion reactions that necessitate ...


    By IC Controls Ltd.

  • Development of a low‐density polyethylene‐containing passive sampler for measuring dissolved hydrophobic organic compounds in open waters

    A passive water sampler with low‐density polyethylene (LDPE) as the sorbent phase was built and field‐tested for sensing freely dissolved concentrations of hydrophobic organic compounds (HOCs) in fresh and coastal water. Based on the measured LDPE–water partition coefficients (Kpew) of 12 polycyclic aromatic hydrocarbons (PAHs) and dichlorodiphenyltrichloroethane (DDT) and its seven metabolites, ...


    By John Wiley & Sons, Ltd.

  • Automated method for determination of dissolved organic carbon – water distribution constants of structurally diverse pollutants using pre‐equilibrium solid phase microextraction

    Dissolved organic carbon (DOC) plays a key role in determining the environmental fate of semi‐volatile organic environmental contaminants. The goal of the present work was to develop a method using commercially available hardware to rapidly characterize the sorption properties of DOC in water samples. The resulting method uses negligible‐depletion direct immersion solid‐phase microextraction ...


    By John Wiley & Sons, Ltd.

  • Sure, We Have Lots of Bioreactor Solids… But How Many are Active?

     ABSTRACT Biological wastewater treatment processes harness the ability of microorganisms to break down and assimilate organic compounds that, if left untreated, cause detriment to the environment. Although this process occurs naturally, engineered systems are used to accelerate the process by optimizing bioreactor conditions to promote higher-than-typical biomass concentrations, thus ...

  • Method for Computing alkalinity based on Total Inorganic Carbon (TIC) and related data case study

    Summary Standard Methods (Ref. 1) has a procedure using nomographs for estimating COt concentrations (Method 4500-CO2 B) based on total alkalinity titrations. The method presented here reverses that process by computing alkalinity based on TIC measurements using infrared technology. These two methods are demonstrated to be compatible, which is not surprising since they use the same ...


    By TOC Systems, Inc.

  • Measurements of assimilable organic carbon (AOC) in high saline conditions using P17

    Biofouling caused by the deposition or growth of microorganisms on the membrane surface is one of the major concerns in nanofiltration (NF) and reverse osmosis (RO) processes. Assimilable organic carbon (AOC) has been a useful index to assess the growth potential of bacteria. In the case of drinking water, the AOC assay method has been widely applied to estimate growth or regrowth potential of ...


    By IWA Publishing

  • Sample Handling Strategies for Accurate Lead-In-Soil Measurements in the Field and Laboratory

    ABSTRACT The inhomogenous lead-in-soil matrix can present serious obstacles to accurate sample collection and handling. In typical lead-in-soil measurement, particle size related errors in sampling and sample handling often exceed all other sources of error. The magnitude of error can vary widely depending on the particulate nature of the lead contaminant and the effectiveness of control ...

  • A Treatise on Turbidity and TSS

    When two distinct physical parameters are used interchangeably, an intimate understanding of both is in order to know when this is justifiable.  Two such parameters are turbidity and total suspended solids.  In many industries today the concentration of total suspended solids is of utmost importance to quality control and process optimization.  However, the measurement most often employed is ...


    By Orival, Inc.

  • Nickel effects on productivity of algal periphyton communities

    In order to evaluate the long-term (30-day) influence of nickel on biomass of periphyton communities, indoor artificial streams were used with differing nickel concentration (2.5, 5, and 7.5 mg/l). Physical and chemical factors (pH, NO3-N, PO4-P, dissolved oxygen, total suspended solids, conductivity, total dissolved solids, biochemical oxygen demand, and chemical oxygen demand) were ...


    By IWA Publishing

  • In-depth characterization of secondary effluent from a municipal wastewater treatment plant located in Northern China for advanced treatment

    This study provided insight into the characterization of secondary effluent from a wastewater treatment plant located in northeastern China. The secondary effluent was separated into three fractions, the dissolved, the near-colloidal and the suspended, to study their individual characteristics. It revealed that most of the organics in the secondary effluent existed in the dissolved form, ...


    By IWA Publishing

  • Evaluating the effects of septic tank on shallow wells in Iba housing estate, Ojo LGA, Lagos

    Water samples from 30 shallow wells were measured for depth, depth to water table, and distance to septic tank. In situ parameters including electrical conductivity, pH, total dissolved solids, and temperature were measured using portable meters. Chemical parameters including salinity, chloride, calcium, alkalinity and total hardness were determined using titrimetry method. Sulphate and nitrate ...


    By Inderscience Publishers

  • Study of physico-chemical quality of the industrial waste water effluent from Gove industrial area of Bhiwandi City of Maharashtra, India

    This paper advocates water pollution study of Gove industrial area of Maharashtra, India with special reference to the physico-chemical characteristics of common industrial waste water effluent. The physico-chemical parameters like temperature, pH, solid content, total hardness, chloride content, dissolved oxygen (DO), biological oxygen demand (BOD) and chemical oxygen demand (COD) were studied ...


    By Inderscience Publishers

  • Stability and environmental geochemical profile of toxic heavy metals in soils around a crude oil refinery

    Soil samples were taken near oil refinery activities, bulk and fractionated heavy metal contents, as well as other physico-chemical characteristics were measured. The reported results indicate that the enrichment factors of the measured heavy metals were 3.9, 1.8, 1.3, 23.7 and 52.5 for lead, nickel, zinc, cadmium and mercury, respectively. The samples can be considered to be extremely ...


    By Inderscience Publishers

  • Water testing 101: TDS

    According to Wikipedia, total dissolved solids (TDS) is defined as “the combined content of all inorganic and organic substances contained in a liquid that are present in a molecular, ionized or microgranular suspended form.” The article goes on to state that “total dissolved solids are differentiated from total suspended solids (TSS) in that the latter cannot pass through a ...


    By HM Digital, Inc.

  • Development of Nutrient TMDLs for the Raritan River Basin

    A large watershed study was performed to develop Total Maximum Daily Loads (TMDLs) as necessary to address phosphorus and other conventional impairments in the Raritan River Basin. The Raritan River Basin encompasses over 1,100 square miles in the north-central portion of New Jersey that drain to the Raritan Bay.Extensive data collection was performed, the purpose of which was to augment ...

  • What is Wastewater?

    What is wastewater? Wastewater, the waste discharge that first comes to mind in any discussion of stream pollution, is the discharge of domestic wastewater, which contains a large amount of organic waste. Industry also contribute substantial amounts of organic waste, some of which comes from vegetable and fruit packing; dairy processing; meat packing; tanning; processing of poultry, ...

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