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 40 for “"pH Adjustment"”.
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Quality and browning and the effects of ph adjustment on cakes prepared with high fructose corn syrup
… tested under controlled conditions. The pH and specific gravity were determined for cake batters. Baked cakes were evaluated for pH, standing height as an index to volume, moisture, deformation, crust color, and crust and crumb browning. Volume, color and browning were all significantly …
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Characterization and treatment of wastewater from blue crab (Callinectes sapidus) processing facilities
… 2,500-4,000 mg/L, NH3-N = 70-160 mg/L and Total Phosphorus= 100-185 mg/L. One process effluent contained chloride concentrations exceeding 100,000 mg/L. Analysis of production and effluent characterization data from two mechanized plants revealed that wastewater volumes and concentrations varied …
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Chemical reduction and oxidation combined with biodegradation for the treatment of a textile dye wastewater
… These included reductions followed by pH adjustment, nutrient addition, pH adjustment and nutrient addition, and lime addition. These tests were also successful in reducing the color but were not biologically degradable. Reduction of the dye wastewater followed by oxidation, however, …
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Investigating biomass saccharification for the production of cellulosic ethanol
… desorption methods were investigated, including pH adjustment, detergents, high salt solution, and polyhydric alcohols. The pH adjustment to 13.0 and the elution by 72% ethylene glycol at a neutral pH were among the most efficient approaches for desorbing the adsorbed cellulase. For the recycling …
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Organic fouling in membrane capacitive deionization systems
… To evaluate the reversibility of fouling, pH adjustment, chelating agents, and hydraulic cleaning were applied to the membranes. Cleaning with pH adjustment reduced the system pressure, but still showed declines in system performance, even with cleaning cycles every 20 hours for 80 hours of …
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Management Strategies for Natural Cider Fermentation: Effects of sulfite addition and acidification in high- and low- tannin cultivars
… of common pre-fermentation sulfite addition and pH adjustment on cider chemistry and sensory outcomes for naturally fermented high- and low-tannin apple cultivars. Four treatment conditions were applied to both the high- and the low- tannin cultivars: acidification only, sulfites only, …
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The Synthesis of Succinic Acid and its Extraction From Fermentation Broth Using a Two-Phase Partitioning Bioreactor
… account for 70% of total production costs. Two-Phase Partitioning Bioreactors (TPPBs) can increase volumetric productivity through in-situ product removal, although SA uptake by polymers requires a pH below the pKA2 of SA (4.2). Sparging CO2 gas into the bioreactor was proposed to temporarily …
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Aerobic treatment of CTMP wastewater in sequencing batch reactors
… mill for 1 and 1/2 years. For the runs without pH adjustment, COD removals of 32-41% and BOD₅ reductions of 70-75% were achieved by the end of each 24-hour cycle (after one hour in-situ settling). When the decanted wastewater was settled for an additional three hours, COD reductions of 53-59% …
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Color and TOC removal from pulp and paper wastes by ultrafiltration
… ultrafiltration more effective. Pretreatment by pH adjustment and alum coagulation were not effective in improving ultrafiltration performance. Concentration studies indicate that volume reductions up to 95% may be accomplished without excessive membrane fouling. Membrane cleaning with caustic, …
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Color removal from pulp and paper wastes by coagulation
… alum coagulation would involve a lesser cost in pH adjustment as compared to ferric chloride coagulation. Alum sludge dewatered and thickened more rapidly than the iron sludge; however, after mechanical dewatering, the alum cake had a slightly greater moisture content than the sludge produced …
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A new process for the separation and purification of egg yolk antibodies
… the yolk by dilution with distilled water and pH adjustment, separation of IgY from the WSF using a cation exchange column in an automated chromatography system, and finally purification of IgY using precipitation with sodium sulphate. The overall recovery of the process was approximately 50%, …
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Optimization of a Copper/Molybdenum Flotation Circuit by Depressing Pyrite from the Rougher Flotation Stage Using Different Scheme of Reagents
… was to determine an effective alternative to pH adjustment using lime. Experiments were conducted using the most common selection of reagents: xanthate and lime to recover copper and reject iron to establish a base test to compare other reagent schemes with. This work included flotation …
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ENHANCING BIOGAS PRODUCTION IN COLD-REGION WASTEWATER TREATMENT USING ULTRASONIC PRETREATMENT AND CO-DIGESTION WITH BREWER’S SPENT GRAIN
… to environmental factors such as temperature and pH. Cold-region MWTPs are particularly challenging locations including the currently studies Saskatoon Wastewater Treatment Plant in Saskatoon, Saskatchewan, Canada. As a response to these issues, the purpose of this study was to investigate the …
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Addressing gaps in the US EPA Lead and Copper Rule: Developing guidance and improving citizen science tools to mitigate corrosion in public water systems and premise plumbing
… identify lead problems, 2) Refines orthophosphate corrosion control guidance to help reduce cuprosolvency, 3) Identifies challenges to mitigating cuprosolvency by raising pH, and 4) Develops guidance that can help residents assess and address cuprosolvency problems. Lead in drinking water …
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Removal of trace elements from coal using a multiple-property processing circuit
… of coal that may be more difficult to remove by physical cleaning are ideal candidates for removal by chelating agents. The purpose of this study was to determine whether trace elements can be effectively separated from coal using the circuit followed by chelating agents. Thirteen of the sixteen …
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Defluoridation of typical eastern Virginia groundwater
… mg/l, 670 mg/l alum was utilized. If the system pH was lowered below 6.0 the fluoride reduction was insufficient and thus lime was required to maintain the pH above 6.0. However, hardness increased with the lime dose and other methods of pH adjustment such as employing soda ash should be …
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Biological applications of weal polyelectrolyte multilayers
… weak polyelectrolyte multilayers with specific emphasis on cell patterning, drug delivery, and antibacterial coatings. All of these very different applications were studied using three different polymers - polyacrylic acid (PAA), poly(allylamine hydrochloride) (PAH), polyacrylamide (PAAm). The …
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Color Removal From Pulp Mill Effluent Using Coal Ash Produced From Georgia Power Coal Combustion Plants
… in 80% color removal, and required no effluent pH adjustment. Color removal by CFA was observed to occur primarily in the first hour, with the adsorption achieving equilibrium at 24 hours. Additionally, the Ho et al. kinetic model and the Langmuir and Freundlich isotherm models best described …
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Exploring the potential of duckweed (Lemnaceae) as a circular protein crop on agri-food industry wastewaters
… for their valorisation through simultaneous phytoremediation and the production of a protein-rich biomass. In this thesis, through several laboratory-scale trials (100 mL – 7.5 L), it was explored whether two readily available agri-food wastewaters, dairy soiled water and meat processing …
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Harnessing <i>Haloferax mediterranei</i> for Bioplastic Production from Organic Waste
… reviewed current knowledge on the organism's physiology and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) synthesis metabolism of this halophilic archaeon, identifying key technical challenges such as waste variability, feedstock pretreatment, and the needs for efficient volatile fatty …
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