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 18 of 18 for “"Primary effluent"”.
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Seasonal Nutrient Dynamics in a Small-Scale Constructed Wetland Treating Primary Effluent with Applications of Effluent Reuse in Biomass Production
… a nutrient and pollutant buffer with the wetland effluent providing irrigation water for industrial crops. The industrial crops are then proposed to be utilized for energy production. Furthermore, a simple design model attempts to provide a rapid assessment of feasibility of constructed wetlands …
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Seasonal Nutrient Dynamics in a Small-Scale Constructed Wetland Treating Primary Effluent with Applications of Effluent Reuse in Biomass Production
… a nutrient and pollutant buffer with the wetland effluent providing irrigation water for industrial crops. The industrial crops are then proposed to be utilized for energy production. Furthermore, a simple design model attempts to provide a rapid assessment of feasibility of constructed wetlands …
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Bioflocculation of Wastewater Treatment Pond Suspended Solids
… treatment, but they commonly have high effluent concentrations of total suspended solids (TSS). In this thesis algae pond effluent was treated in a beaker testing apparatus (mixed and aerated) with various mixtures of activated sludge and primary effluent simulating differing activated …
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An Investigation of the Feasibility of Nitrification and Denitrification of a Complex Industrial Wastewater with High Seasonal Temperatures
… is very unique both because it is comprised of effluents of seven different industries in the area in addition to the domestic wastewater in the area, and because it reaches high temperatures in the basins, often above 45oC during the summer. Four different bench scale systems consisting of …
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Enzymes : the new water/wastewater treatment chemical
… of PPCPs from municipal wastewater after primary treatment is investigated. Oxybenzone was selected as a representative PPCP. Like many other PPCPs, oxybenzone is not recognized directly by the laccase enzyme. Therefore, mediators were used to expand the oxidative range of laccase, and the …
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The effects of acetone shock loading on phenol acclimated cultures
… sequential substrate utilization and increased effluent phenol concentrations was evaluated. Phenol acclimated batch and continuous-flow systems, developed with seed from a municipal wastewater treatment plant, were shock loaded with acetone, bacto-peptone, and domestic primary effluent. Phenol …
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Energy-efficient Wastewater Treatment by Microbial Fuel Cells: Scaling Up and Optimization
… For single-chamber tubular MFCs, anode effluent is used as catholyte instead of tap water or buffer solutions. Therefore, exposing cathode electrode to atmosphere could be also considered as a passive aeration for further aerobic oxidation of organics and nitrification. Based on several …
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Seasonal influent characterization, model calibration, SRT and energy usage for nitrogen removal at a full scale wastewater plant
… study was to evaluate the effects of different primary effluent characteristics (COD components), solid retention times (SRTs), and temperatures on denitrification rates in a full scale system, including evaluation of seasonal effects. In order to investigate seasonal variations, four seasonal …
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The effect of mean cell residence time on the dewatering characteristics of a biological sludge
… reactors fed with a synthetic substrate and a primary effluent-dog food mixture, respectively, were used to perform dewatering tests. The sludges were evaluated at various MCRT values for optimal dewatering resistances, optimal conditioning requirements, and optimal compressibility conditions. …
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Enzymatic treatment of pharmaceuticals and personal care products (PPCPs) in municipal wastewater
… treatment will be most beneficial after primary sedimentation and before conventional biological treatment, where unoxidized PPCPs and byproducts could have the opportunity for further degradation in biological treatment. In this work, two enzymatic treatment configurations were studied. …
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Carbon-efficient Wastewater Treatment Through Resource Recovery, Process Intensification, and Partial Denitrification Anammox
… idea was tested in a pilot setup treating real primary effluent under highly variable influent conditions and low temperatures. The results showcased substantial carbon savings while meeting the stringent effluent requirements. To take a deeper dive into the PdNA performance and the underlying …
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The effect of anoxic selectors on the control of activated sludge bulking and foaming
… activated sludge experiments were conducted on primary effluent municipal wastewater to evaluate the effects of anoxic selectors on controlling activated sludge bulking and foaming. These experiments were conducted with two pilot plants; a three stage anoxic selector preceding a complete mix …
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Potential Coal Slurry Toxicity to Laboratory and Field Test Organisms in the Clinch River Watershed and the Ecotoxicological Recovery of Two Remediated Acid Mine Drainage Streams in the Powell River Watershed, Virginia
… The results of the study suggested that the primary effluent from the coal preparation facility had acute and chronic toxicity; however, the settling pond system utilized at this plant mitigated the impacts of the plant from reaching the Clinch River. Along with active mine discharges, acid …
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AN INVESTIGATION OF AQUATIC MACROPHYTE-BASED AQUATIC WASTEWATER TREATMENT SYSTEMS FOR TEMPERATE CLIMATES (ELODEA NUTTALLII, PHOTOSYNTHESIS, NUTRIENT BUDGET, ACTIVE TRANSPORT, NITRIFICATION)
… aquatic treatment system was designed to treat primary effluent. Four aquatic macrophytes (Elodea nuttallii, Lemna minor, Myriophyllum heterophyllum, Ceratophyllum demersum) were evaluated as candidates. The hydraulic, organic, and nutrient loadings to the reactors were similar to design values …
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Evaluation of Nitrification Inhibition Using Bench-Scale Rate Measurements, Profile Sampling, and Process Simulation Modeling
… upsets are characterized by sharp increases in effluent ammonia and nitrite with decreases in nitrate concentrations due to reduced growth rates in bacteria. The result is reduced overall total nitrogen (TN) removal. Continuous inhibition is evidenced by a previous engineering report by Hazen …
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Development of biomaterials from sustainably produced macroalgae feedstocks
… cellulose from Oedogonium calcareum grown in primary effluent. It introduces an economical and effective extraction method utilizing a hot alkali, which also provides disinfection, ensuring that the biomass is free from pathogens, making it safe for further use. The biostimulant extract was …
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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
… pilot raceways (1,000-L, 0.30-m deep, fed primary clarifier effluent) were operated at an inland central California wastewater treatment plant. Two pilot pond experiments were conducted to determine the effect of (1) night aeration (1800 to 0600) on nitrification, biomass productivity, DO, …
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Effects of Raceway Pond Water and Nutrient Recycling on Microalgae Production and Harvesting
… supplementation). One control set was fed primary clarifier effluent while the other control set was fed nitrified, filtered reclaimed wastewater. The two experimental raceway sets were fed different nutrients. One set received anaerobically-digested algal biomass (algae digestate) and the …