sludge sampling Articles

  • Removal of heavy metals from samples of residual sludge

    Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1−1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.Keywords: heavy metals, nitric acid leaching, ...


    By Inderscience Publishers

  • Using FIMS to determine mercury content in sewage sludge, sediment and soil samples

    Tim Flow Injection Mercury System (FIMS) is a dedicated system that integrates flow injection mercury cold vapor generation with a very sensitive detector. The exceptional system stability and the long path measurement cell provide instrumental detection limits as low as 5 ng/L using a sample volume of 5(H) jxL. The improved sensitivity of the FIMS permits sample dilution, therefore reducing the ...


    By PerkinElmer, Inc.

  • Containment for Soil, Sediment, and Sludge

    Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, ...

  • Respirometry study of two different wastewater samples on COD fractioning & biodegradability for a specific activated sludge process and nitrification case study

    Preliminary This service was made according to customer order points and indications from Hydrolab Microbiológica (Surcis collaborator) The client wanted Surcis to carry out a study about COD fractioning and nitrification. For this study the client has provided to Surcis the following: Process type: Activated sludge - Extended aeration 2 ...


    By SURCIS, S.L.

  • Parallel Pressurized Solvent Extraction of PCDD/PCDF, PBDE, and PFC from Soil, Sludge, and Sediment Samples

    The efficacy of pressurized solvent extraction with BUCHI's new SpeedExtractor was examined for the extraction of dioxins/furans (PCDDs/PCDFs), polybrominated diphenyl ethers (PBDEs), and perfluorinated compounds (PFCs) from different environmental matrices: PCDDs/PCDFs from soil samples, PFCs from soil and sewage sludge, and PBDEs from lake sediments. The results of the extraction of PCDDs/PCDFs ...


    By BÜCHI Labortechnik AG

  • Effect of sludge age on heavy metal biosorption by selector activated sludge

    The influence of sludge age on the metal biosorption characteristics of an aerobic selector-activated sludge was investigated. Two bench-scale aerobic-activated sludge systems were operated at sludge ages of 5 days and 15 days for studying biosorption of Cu and Cr(VI). In-vitro batch experiments were performed to compare biosorption characteristics of the sludge samples harvested from the ...


    By Inderscience Publishers

  • Ultrasonic irradiation of activated industrial sludge

    Sludge is a by-product of wastewater treatment and contains multitude of pollutants. In the present study, irradiation with ultrasound as treatment technique was carried out to treat complex effluent paper sludge, sugar sludge and sewage sludge samples from different industrial places. Wastewater samples were treated in ultrasonic bath at 25 kHz for different time periods of 5 min, 10 min, 20 min ...


    By Inderscience Publishers

  • Determining analytes in food, soil and sludge

    Customer: Institute of Sustainable Halophyte Utilization, Pakistan The Institute of Sustainable Halophyte Utilization, University of Karachi has been established as an elaborate facility for research of various halophytes to serve as a source of fodder, forage, biofuel, oil seeds, medicinal plants and other possible usages. Application: Determining analytes in food, soil ...


    By BÜCHI Labortechnik AG

  • Data Requirements for Soil, Sediment, and Sludge

    Site soil conditions frequently limit the selection of a treatment process. Process-limiting characteristics such as pH or moisture content may sometimes be adjusted. In other cases, a treatment technology may be eliminated based upon the soil classification (e.g., particle-size distribution) or other soil characteristics. Soils are inherently variable in their physical and chemical ...

  • Heavy metal & hydrocarbon contaminated sludge

    Solidification of Heavy Metal & Hydrocarbon Contaminated Sewage Sludge Client: North Lanarkshire Council Project Managers: Jacobs Challenge: The former sewage treatment works were decommissioned in the 1970’s. It is thought that during the closure process, demolition material originating from the ...


    By Soilutions Ltd

  • Ultrasonic impact on bacterial population in sewage sample

    Nine samples of sewage sludge from different paper mills of New Delhi were treated with ultrasonic waves of two different frequencies, viz., 35 kHz and 130 kHz for different time periods (5, 10, 20 and 30 min). Treated sewage sludge was then evaluated with different parameters, viz., Chemical Oxygen Demand(COD), Biochemical Oxygen Demand (BOD), Total Nitrogen, Total Phosphorus, Total Ammonia and ...


    By Inderscience Publishers

  • Influence of nanoparticles on the polymer-conditioned dewatering of wastewater sludges

    The effect of using small-scale, high surface area, nanoparticles to supplement polymer-conditioned wastewater sludge dewatering was investigated. Aerobically digested sludge and waste activated sludge sourced from the Hunter Valley, NSW, Australia, were tested with titanium dioxide nanoparticles. The sludge samples were dosed with the nanoparticles in an attempt to adsorb a component of the ...


    By IWA Publishing

  • Effect of daylight on regrowth of bacteria in anaerobically digested sludge

    This study investigated the regrowth of total coliform, Salmonella, and Clostridium perfringens in anaerobically digested sludge after centrifuge dewatering in the presence and absence of daylight. Sludge cake and centrate samples were collected from a treatment plant, and half of the samples was stored in daylight and the other half was stored in dark for three weeks. The ...


    By IWA Publishing

  • OUR Set-Point Control of Activated Sludge Processes

    The OUR Set-Point method is useful for controlling the activity and loading-rate capacity of an activated sludge mixed liquor. In this case, sufficient amounts of a stock substrate are added to a mixed liquor suspension to provide kinetic saturation with subsequent measure of OUR. Once an acceptable substrate is found for a specific wastewater treatment plant, an OUR can be identified that ...


    By Challenge Technology

  • Somatic coliphages as surrogates for enteroviruses in sludge hygienization treatments

    Conventional bacterial indicators present serious drawbacks giving information about viral pathogens persistence during sludge hygienization treatments. This calls for the search of alternative viral indicators. Somatic coliphages’ (SOMCPH) ability for acting as surrogates for enteroviruses was assessed in 47 sludge samples subjected to novel treatment processes. SOMCPH, infectious ...


    By IWA Publishing

  • Impact of microwave treatment on properties of waste activated sludge

    The impact of changing microwave (MW) operational parameters such as temperature, intensity, contact time, and sludge concentration on the physic–chemical and microbiological properties of waste activated sludge (WAS), as well as on biogas production have been investigated. Results obtained indicated that sludge solubility increases with the increase of MW contact time and temperature. At an ...


    By Inderscience Publishers

  • Analysis of Sewage and Sewage Sludge by Simultaneous ICP Spectroscopy

    In recent years, the development and expansion of sewage treatment facilities has resulted in increased amounts of sludge which is generated in the treatment process, and which has presented a problem due to processing of the sludge itself. Sludge is normally incinerated or solidified and then disposed of in landfills or recycled for use in construction materials such as concrete or ...

  • Land remediation & sludge processing case study

    In late 2009 the company was approached by a London based consultancy on behalf of their clients with oil and gas interests in an Eastern European country. The brief was to supply a technology that could assist in the clean-up of historical oil spills around redundant oil wells in a working oilfield. Our initial meeting led us to believe that this was a viable contract and following several ...

  • Sewage sludge solubilization by high-pressure homogenization

    The behavior of sludge solubilization using high-pressure homogenization (HPH) treatment was examined by investigating the sludge solid reduction and organics solubilization. The sludge volatile suspended solids (VSS) decreased from 10.58 to 6.67 g/L for the sludge sample with a total solids content (TS) of 1.49% after HPH treatment at a homogenization pressure of 80 MPa with four ...


    By IWA Publishing

  • Geotube Dewatering for Lagoon Sludge - Case Study

    Background In many animal waste management schemes it is desirable to separate solids from waste water and/or manures. In cooperation with the Department of Animal and Dairy Science, animal waste specialists from Biological and Agricultural Engineering are field testing a technology new to agriculture, to remove solids from lagoons. The test is currently being conducted at the UGA Dairy ...

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