effluent testing Articles

  • Whole Effluent Toxicity Testing

    What is Whole Effluent Toxicity (WET) testing? Whole Effluent Toxicity (WET) testing is an important component of the U.S. Environmental Protection Agency’s (USEPA’s) integrated approach for detecting and addressing toxicity in surface waters. The National Pollutant Discharge  Elimination System (NPDES) permit program, authorized by the Clean Water Act, controls water pollution by ...

  • Water Treatment Optimization - Case Study

    Drinking water treatment in North America has stringent requirements for effluent water quality, with a great amount of attention being drawn to the presence of hazardous disinfection by-products (DBPs) persisting through water distribution systems. The operation of water treatment plants involves addition of various mixing agents to help with coagulation and settling of organics in the raw water ...


    By MANTECH

  • Field tests on a grease trap effluent filter

    Abstract: This study investigates the field performance tests of a commercial grease trap effluent filter for removal of total suspended solids, and oil and grease discharged from the clear zone of full service restaurant grease traps. The grease trap effluent filters were installed on 1,000-gallon, 2,000-gallon and 5,400-gallon full service restaurant grease traps over a period of 8 weeks, and ...

  • Genotoxicity of swine effluents

    This study aimed at the investigation of genotoxic effects of swine effluents from different stages of a treatment system for swine wastes through bioassay of stamen hairs and micronuclei in Tradescantia (clone BNL 4430). No significant differences (p≥0.05) regarding the genic mutations were found in the bioassay of stamen hairs, independently of the effluent analysed. For the ...


    By IWA Publishing

  • The 'whole-effluent' toxicity approach

    The identification and quantification of effluent toxicity plays an important role in the evaluation of harmful impacts on the aquatic environment. The aim of this study was to demonstrate the advantages of using the 'whole-effluent' toxicity approach compared to prediction of toxicity using key toxic compounds. An underestimation of 'whole-effluent' toxicity was always observed using bacteria, ...


    By Inderscience Publishers

  • Evaluation of the test of significant toxicity for determining the toxicity of effluents and ambient water samples

    The test of significant toxicity (TST) is a hypothesis‐testing approach based on bioequivalence developed by the U.S. Environmental Protection Agency (U.S. EPA) for analyzing whole‐effluent toxicity (WET) and ambient toxicity data. The present study compares results of acute and chronic toxicity tests of effluent, storm‐water, and ambient (i.e., receiving‐water) samples using both the TST and ...


    By John Wiley & Sons, Ltd.

  • Fibreboard plant recycles plant effluent

    The Facility Laminex Industries in Gympie, Queensland, Australia is a leading producer of medium density fibreboard-based panel products. The Problem Laminex Gympie is a zero wastewater discharge site. Laminex was installing a second plant at their site to expand production capacity. It became apparent that borewater quantity and quality was unpredictable, ...

  • Case study - Ocean effluent discharge

    British Columbia’s fly-in recreational fishing lodge industry was threatened by federal regulators to be closed or fined up to $200,000 unless the sewage wastewater was treated. NOMADIC kept them open and operating. Three types of fly-in recreational fishing lodges are located on the west coast of British Columbia operate 6 – 8 weeks per year, employ approximately 500 persons for the ...


    By Nomadic Systems

  • Nitrification of high salinity chemical effluents

    1. The problem While during the biotreatment of non inhibitory chemical effluents containing 30 to 60 g/L salt the main part of organic pollutants (TOC, COD) do become degraded, is the nitrification of the present NH4N by suspended biomass because of high osmotic pressure in the reactor not possible. 2. The solution Lab scale tests have shown, that nitrification ...

  • Evaluation of whole effluent toxicity data characteristics and use of Welch's t‐test in the test of significant toxicity analysis

    The U.S. Environmental Protection Agency (U.S. EPA) and state agencies evaluate the toxicity of effluent and surface water samples based on statistical endpoints derived from multiconcentration tests (e.g., no observed effect concentration, EC25). The test of significant toxicity (TST) analysis is a two‐sample comparison test that uses Welch's t test to compare organism responses in a sample ...


    By John Wiley & Sons, Ltd.

  • Anaerobic effluent treatment at a chemical industrial complex

    In order to test the feasibility of anaerobic treatment of an effluent from a chemical factory producing intermediates for synthetic fibres, test work with a 45 l UASB pilot plant was conducted. After conducting a successful pilot study a full-scale anaerobic effluent treatment plant including a 400 m3 combined buffer/pre-acidification tank and a 990 m3 Biopaq®-UASB reactor was constructed. The ...


    By Paques B.V.

  • Reducing Effects Of Endocrine Disrupting Compounds: Effluent Blending

    Treatment of Publicly Owned Treatment Works (POTW) sewage effluents to minimize adverse impacts to the environment has rapidly progressed through time. However, the increasing population and industrial demand for increased treatment combined with the developing interest in endocrine disrupting compounds (EDCs) in receiving waters are becoming a critical environmental concern. EDC levels in ...

  • It is time for changes in the analysis of whole effluent toxicity data

    The whole effluent toxicity (WET) program in the United States, Canada, and other countries typically requires multi concentration testing of effluents. While multiconcentration testing of chemicals is desirable for regulatory and scientific reasons, we believe this requirement is not as efficient for evaluating effluent compliance in a WET program. The key regulatory question of concern is ...


    By John Wiley & Sons, Ltd.

  • Avondale Foods effluent treatment - Case Study

    Introduction Avondale Foods (Craigavon) Ltd. is one of the UK's leading manufacturers and suppliers of coleslaw, wet salads, side salads, vegetable accompaniments, soups, sauces and mayonnaise to retail and foodservice customers throughout Britain and Ireland. The company has a team of over 380 people working in its state-of-the-art facility, with all products being manufactured on the ...


    By Water Tecnik Ltd.

  • Biofuels effluent, does it exceed regulatory limits?

    The US Environmental Protection Agency (EPA), as well as other regulatory agencies around the world, have established limitation guidelines for discharges of “oily wastes” from facilities utilizing any type of oil and grease in their manufacturing process. However, recently several biodiesel plants in the US have been fined for illegally discharging vegetable-based oil and grease and polluting ...


    By Spectro Scientific

  • The use of step and pulse tests to design activated carbon adsorption columns for recovery of copper ions from aqueous industrial effluents

    Dynamic experiments were carried out on the adsorption of copper ions in a laboratory packed bed of activated carbon. Both pulse and step change inputs were used. Measurements were reproducible and replicate measurements furnished nearly identical parameters for a conventional heterogeneous model of the activated carbon bed, assuming a Langmuir adsorption isotherm. Bed depth had little effect on ...


    By Inderscience Publishers

  • Analysis of Anionic Contamination & General Quality Testing in Water from Sewage Treatment Plants and Industrial Discharge & Effluents by Colorimetry

    Problem The high concentration of Industry, Agriculture and People in and around the United States has changed the “nature” of our environment. There are Toxic Metals coming from various metallurgical processes; Plating, Foundry, Smelting, Milling, etc., which are readily determined by Atomic Absorption Spectroscopy (AAS). Volatile Organics from the many Petrochemical-based operations are ...


    By Buck Scientific Inc

  • Evaluating Food Digestion Effluent For Landscape Use

    Over the last year, Loyola Marymount University (LMU) has installed and studied a food waste diversion technology that converts raw food waste into a liquid effluent that is disposed through the sewer system. As an urban university located in West Los Angeles, California, LMU faces two major barriers with respect to composting food waste: on-campus space constraints and long distances to off-site ...


    By BioCycle Magazine

  • Toxicity reduction in industrial and municipal effluents – the state of the art

    Developments in treatment technology have traditionally focused on removal of specific contaminants: BOD, solids, ammonia, TOC and lately, specific organics such as phenol. A limit on effluent toxicity, however, does not fit so neatly into a procedural package, since it truly integrates the presence and impacts of contaminants in a sample. Toxicity reduction evaluation procedures, therefore, are ...


    By Inderscience Publishers

  • Zero Effluent by Application of Biological Treatment at High Temperature

    For the production of high quality corrugated medium and test liner it has been shown since 1995 at a new large size mill in Germany, that no or practically no effluent discharge is necessary when the process water is treated in an anaerobic/aerobic conventional treatment plant, which is followed by sand filtration. In this paper, three different projects are described which show, that the number ...


    By Paques B.V.

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