Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Influent wastewater"”.
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DEVELOPMENT OF MICROBIAL ELECTROCHEMICAL SENSOR FOR TOXICITY SCREENING OF INFLUENT WASTEWATER
… sensor (MES) that is capable to detect influent wastewater toxicity was presented, having the characteristics of being quick, preventative, simple, inexpensive, on-line, and relevant to the activated sludge process. The MES was firstly optimized in terms of both sensing material …
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The Effect of Nutritional Conditions on Floc Formation in Zoogloea ramigera.
… the settling of large suspended solids from the influent wastewater. The liquid is then channeled into the reaction basin where soluble organic compounds undergo degradation, which is primarily accomplished by the metabolic activity of bacteria, though fungi, algae and protozoa may contribute to …
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The Biological Sludge Reduction by anaerobic/aerobic cycling
… effects in terms of the role of iron in the influent wastewater and feeding patterns on the performance of the Cannibal system. It was found that the Cannibal system with high iron in the influent produced less biological solids than the system receiving low iron. The data also showed that …
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Toxicity characteristic leaching procedure analysis of dye containing sludges
… to 1 mg/L. Several organic compounds detected in influent wastewater and in leachate from undigested sludge were not found in the leachate from digested sludge.
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Effect of copper and nickel on the performance of an activated sludge system treating cellulose acetate wastewater
… a laboratory scale activated sludge system. The wastewater used for this research was the influent to the activated sludge process at the Hoechst Celanese cellulose acetate manufacturing plant, located at Narrows, Virginia. The influent wastewater to the experimental unit was pretreated with lime …
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Development of universal stoichiometric coefficients for modeling microalgal cultivation systems
… resource recovery facilities (WRRFs; a.k.a. wastewater treatment plants) are approaching the limit of technology for nitrogen and phosphorus removal. Algae treatment technologies have the ability to remove additional nitrogen and phosphorus, thereby lowering the effluent nutrient discharge …
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Identification and Screening of Biomarkers of Human Exposure to Environmental and Food Toxicants in Sewage
… of HBM studies. A novel approach, called Wastewater-Based Epidemiology (WBE), was proposed as an alternative “biomonitoring tool” with the aim to assess the population exposure to organophosphates, triazines and pyrethroids. A specific analytical method based on liquid chromatography …
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Effects Of Reduced Ras And Volume On Anaerobic Zone Performance For A Septic Wastewater Biological Phosphorous Removal System
… fermented (160 mg/L VFAs), domestic/industrial wastewater from a full scale wastewater treatment facility (WWTF). The pilot plants were operated at 100%, 50%, 40% and 25% RAS (percent of available RAS) flows to the anaerobic tank with the remaining RAS to the anoxic tank. In addition, varying …
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Physical and biological factors affecting oxygen transfer in the activated sludge wastewater treatment process
… sludge (AS) process is widely utilized for wastewater treatment due to its versatility and general resiliency, but is energy intensive, requiring aeration and mixing energy inputs to maintain the biochemical reaction and optimize treatment performance. This study is focused on determining …
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Wastewater Treatment and Nitrogen Removal in Bench-Scale Photobioreactors Operated with Solids Recycling
… VSS after settling.</p> <p>The type of wastewater influenced COD removal. PBRs had 40-50% soluble COD removal when fed 1<sup>o</sup>Eff, and 10-20% removal when fed FAC. Mean PBR effluent COD was the same in both treatments and controls in when fed 1<sup>o</sup>Eff (42 mg/L). When fed …
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Investigation of the Effects of COD/TP Ratio on the Performance of a Biological Nutrient Removal System
… oxygen uptake. The system was fed with municipal wastewater and operated at 20° C. The influent COD concentration was held approximately constant while the phosphorus concentration was varied to obtained the desired COD/TP ratio. Once robust enhanced biological phosphorus removal (EBPR) has been …
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Evaluation of organic and hydraulic loading on the performance of a roughing trickling filter tower using sessil media to treat a high strength industrial wastewater
… media for an undiluted high strength industrial wastewater (from a cellulose acetate manufacturing plant) over a ten-month period from May 1989. The Sessil media used consisted of 20 feet long 1.15 inch wide polyethylene strips hanging from wooden slats at the top of a 26 feet tall tower. The …
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Impact of Wastewater Effluent on Surface Water Resistomes in a Small Lower-Income Community with Deteriorated Sewage Infrastructure
… conditions, and high active microbial density, wastewater treatment plants (WWTPs) are hypothetical hotspots for the evolution and dissemination of AMR, but also function as a crucial checkpoint for restricting discharge of resistant bacteria, ARGs, and other pollutants into the environment. In …
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Development of a Biosensor to Predict Activated Sludge Deflocculation, and the Link Between Chlorination and Potassium Efflux
In an effort to provide wastewater treatment operators with the capability to be proactive in assessing and solving deflocculation events, this study has tested the components of a biosensor to predict deflocculation and investigated the mechanistic cause of deflocculation relating to chlorination …
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Characterization of municipal waste waters
… in the activated sludge method of treating wastewater. The functions of the single sludge system have expanded from carbonaceous energy removal to include progressively nitrification, denitrification and phosphorus removal, all mediated biologically. Not only has the system configuration and …
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The effect of influent organic compounds on the performance of biological nutrient removal systems
… of the research was to investigate the effect of influent organic compounds on the performance of biological nutrient removal system. To carry out the investigation, a pilot plant system was designed and constructed. The system was operated as a UCT process at an influent flow rate of 0.15 …
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A Comparison of Wastewater Process Modelling Tools: Case Study of Potsdam WWTW
A wastewater process model can either be based on a steady-state or dynamic mathematical modelling approach. The characterisation of the influent wastewater and specific wastewater parameters are critical input parameters to the mathematical model, whether for design, optimisation or to measure the …
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Integrated Aeration for Enhanced Nitrogen Conversion and Removal and the Effect of Sampling Frequency on Productivity Estimates in Algae-Based Wastewater Treatment Systems
… to cultivate microalgae for purposes such as wastewater treatment and feedstock for animal feeds and biofuels. Besides nitrogen assimilation in biomass, nitrification can be a wastewater treatment mechanism but one that is hindered by the low nighttime dissolved oxygen concentrations (DO) …
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Simplification of Complex WWTP Models into Simple Design and Evaluative WRRF Tool
Wastewater treatment plant (WWTP) steady-state models have been used, historically, by consulting engineers and researchers for design, process optimisation, and to study and evaluate various operating scenarios. These models have, however, been generally developed for single unit process which …
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Measurement of active biomass in activated sludge mixed liquor
… between the mixed liquor components and the influent wastewater. Fundamental to the steady state design and kinetic simulation models for activated sludge systems is the parameter heterotrophic active biomass (X8 u, mgAVSS/l as measured per the VSS test, or Zm-r, mgCOD/l as measured per the …
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