wastewater influent Articles

  • Use of hybrid reactor in treating cellulose wastewater

    The purpose of this study was to investigate the operation and control of hybrid system in treating wastewater from Iran Wood Fibre Company located in the Caspian Sea. The specific objectives were to determine the effect of substrate concentration on COD removal rate. The experiments have shown three zero-order reactions for the first, first to fourth and fourth to seventh day for all influent ...


    By Inderscience Publishers

  • A simulation of the fate of nitrogen in an on-site wastewater treatment system

    An experiment to study and to build a mathematical model to reproduce the behavior of nitrogen in a residential wastewater treatment process was performed. A pilot unit receiving grey and black water was used. The pilot consisted in a septic tank followed by a fixed-film, partly aerated bioreactor with effluent recirculation operated under two different scenarios: normal operating conditions and ...


    By IWA Publishing

  • Lognormal behaviour of untreated and treated wastewater constituents

    This article presents an extensive study to select the theoretical probability distribution that represents the concentrations of major constituents from 35 wastewater treatment plants located in Brazil, as well as to verify the influence of the adopted treatment technology on the data distributions. Due to the lack of a solid basis for selecting the distributions that best fit the data, various ...


    By IWA Publishing

  • Biodegradability of industrial textile wastewater – batch tests

    Following new trends we applied oxygen uptake rate (OUR) tests as well as long-term tests (in two batch bioreactors systems) in order to assess the biodegradability of textile wastewater. Effluents coming from a dyeing factory were divided into two streams which differed in inorganic and organic contaminants loads. Usefulness of the stream division was proved. Biodegradation of the low-loaded ...


    By IWA Publishing

  • Huntington wastewater treatment plant case study

    Project Summary The Huntington wastewater treatment plant (WWTP) on Long Island, New York is challenged with improving its nitrogen removal efficiency in order to maintain compliance with ever-tightening restrictions on discharge loads. In order to meet this challenge the town initiated a collection system bioaugmentation program with the primary objectives of enhancing the nitrogen removal ...

  • Missouri city wastewater treatment plant case study

    Project Summary Missouri City selected In-Pipe Technology, Inc. to provide a collection system bioaugmentation program reduce influent load, energy costs and sludge production at the wastewater treatment plant (WWTP). The program is also designed to control fats, oil and grease (FOG) accumulation and odor in the collection system. In-Pipe Treatment Strategy ...

  • The performance of UASB reactors treating high-strength wastewaters

    In the study reported here, the authors investigated the influence of hydraulic loading rate, organic loading rate, and recycle rate on the performance of upflow anaerobic sludge blanket (UASB) reactors treating high-strength wastewaters. For this purpose, they used two identical reactors. The removal rates for chemical oxygen demand (COD), total kjeldahl nitrogen (TKN), total phosphorus (TP), ...

  • Multispecies acute toxicity evaluation of wastewaters from different treatment stages in a coking wastewater‐treatment plant

    Coking wastewater contributes approximately 5% of the total discharge volume of industrial wastewaters every year in China. The toxicity of coking wastewater to aquatic organisms is still unknown. The authors evaluated the toxicity of wastewater from different treatment stages in a coking wastewater treatment plant, South China, using 5 test species belonging to different trophic levels: ...


    By John Wiley & Sons, Ltd.

  • Biodegradation of organic compounds from coking wastewater with UASB reactor

    The UASB reactor was applied for biodegradation of organic compounds in coking wastewater. The influent pH ranged between 6.8 and 7.2, and stirring speed and temperature were controlled at 2 r/min and 30±1°C, respectively. The reactor was successfully started up in 133 days. When the influent COD was 2,600 mg/L (VLR was 2.6 kg/m3 d), the removal rate of COD was about 54% and the effluent VFA was ...


    By IWA Publishing

  • Municipal Wastewater Pump Station Design Problems and Solutions

    The growth of the Northern Virginia Area around Washington D.C. has resulted in the requirement for numerous new wastewater pumping stations and the upgrade and expansion of existing pump stations. This paper presents practical problems and solutions associated with the following pump station design issues: 1.) Concrete Corrosion Protection, 2.) Corrosion Resistant Materials, 3.) Pump Protection ...

  • Pathogenic parasites and enteroviruses in wastewater: support for a regulation on water reuse

    Brazilian regulations for nonpotable reuse are being established using World Health Organization guidelines, however, they should be developed based on local monitoring studies. This study intended to analyze enteroviruses, protozoa and viable Ascaris sp. eggs in raw (24) and treated (24) effluents from four Wastewater Treatment Plants of São Paulo State, Brazil. The protozoa were ...


    By IWA Publishing

  • Case study - Crystal lake wastewater treatment plant

    Challenge: The City of Crystal Lake is located about 45 miles northwest of Chicago with a population of nearly 45,000 people. Like many wastewater treatment plants, urban sprawl and suburban development puts the Crystal Lake Wastewater Treatment Plant near a host of commercial and residential neighbors, including a high school immediately west of the plant. Plant managers were very ...


    By OMI Industries (OMI)

  • Wastewater treatment using bioreactor with dual functional ceramic membrane

    A novel bioreactor including a group of dual functional ceramic membranes was developed and used for wastewater treatment. The ceramic membranes could be used for both aeration and filtration alternately, so fouling to ceramic membrane would be palliated effectively as its dual functions. For 100 days operation, COD removal ratio was 88∼97% for influent COD of 154∼1389 mg/L, and NH4+-N removal ...


    By Inderscience Publishers

  • Bayesian modeling of virus removal efficiency in wastewater treatment processes

    Left-censored datasets of virus density in wastewater samples make it difficult to evaluate the virus removal efficiency in wastewater treatment processes. In the present study, we modeled the probabilistic distribution of virus removal efficiency in a wastewater treatment process with a Bayesian approach, and investigated how many detect samples in influent and effluent are necessary for ...


    By IWA Publishing

  • An integrated system for wastewater COD characterization and a case study

    The guidelines of Activated Sludge Model (ASM) can make the use of modeling more straightforward and systematical. Therefore, this paper aims to develop a guideline for wastewater COD characterization. Four physical-chemical methods were compared experimentally for wastewater characterization in this paper and flocculation + 0.45 μm membrane filtration combining respirometry was selected to ...


    By IWA Publishing

  • Low cost processes for the removal of phosphates in water and wastewater

    This paper presents a synopsis of various low-cost techniques employed for the removal of phosphates from water and treated wastewater. Techniques employed include seawater flocculation and coagulation/flocculation using bittern, adsorption on fluidised raw dolomite bed, and filtration through iron and aluminium coated filter media. Seawater flocculation at a seawater concentration of 10% ...


    By Inderscience Publishers

  • Fluoride reduction system for the reduction of fluorides from wastewaters

    Client: Major semiconductor fab; Santa Clara, CA. Industry: Semiconductor Manufacturing. Installation Date: May 2001. Objective: To reduce total fluorides and neutralize rinse waters and concentrated bath dumps from the fab area. Criteria and Limitations: Influent flow varies from 5,000 gpd to ...


    By Digital Analysis Corp.

  • Crown point wastewater treatment plant case study

    Project Summary Due to capacity issues, the City of Crown Point was forced to either start planning for expensive capital expansions of the facility or to investigate alternative technologies that would increase capacity. In 2007 the City chose In-Pipe Technology to improve the treatment capacity of the plant without capital improvements. In-Pipe's goal is to improve the efficiency of the ...

  • Evaluation of virus reduction efficiency in wastewater treatment unit processes as a credit value in the multiple-barrier system for wastewater reclamation and reuse

    The virus reduction efficiency of each unit process is commonly determined based on the ratio of virus concentration in influent to that in effluent of a unit, but the virus concentration in wastewater has often fallen below the analytical quantification limit, which does not allow us to calculate the concentration ratio at each sampling event. In this study, left-censored datasets of ...


    By IWA Publishing

  • Packaged Wastewater Treatment for Guantanamo Bay - Case Study

    PROJECT DETAILS LOCATION Naval Station Guantanamo Bay, Cuba CUSTOMER United States Navy SOLUTION Advance Extended Aeration Wastewater Treatment Plant TECHNOLOGIES 300,000 GPD Packaged Plant Featuring Gravity Sand Tertiary Filter System Extended aeration plant ...


    By Fluence Corporation

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