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 184 for “"dewatering"”.
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Fine Coal Dewatering
… be solved by developing more efficient fine coal dewatering processes, since bulk of the cost associated with processing fine coal is due to dewatering. For this reason, Virginia Tech has developed new chemicals that can increase the efficiency of mechanically dewatering coal fines. To determine …
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Electroosmotic dewatering of wastewater sludges.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Electrokinetic Dewatering of Oil Sands Tailings
… low hydraulic conductivity of the tailings, both dewatering and consolidating the tailings are difficult. Since electrokinetic (EK) is an effective method to consolidate low permeability soils, the objective of this study is to assess the effectiveness and efficiency of EK dewatering of MFT, a …
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Dewatering Of Biosolids By Sodium Ferrate
… effectiveness of the liquid form of ferrate for dewatering of biosolids from wastewater treatment facilities. Two different ferrate products prepared using calcium hypochlorite and sodium hypochlorite were used. Samples of anaerobic digested sludge and waste activated sludge with solids content …
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Conditioning for shear in sludge dewatering
… how chemical conditioning agents and mechanical dewatering devices affect sludge dewatering with respect to shear. Bench scale experiments were performed to determine the effect of shear and mole charge on polymer dose requirements using anaerobically digested sludge. Lime, ferric chloride, and …
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Fine Coal Dewatering Using Hyperbaric Centrifugation
… from the surfaces of particles using mechanical dewatering equipment. Unfortunately, the existing processes that are used to dewater fine particles are inefficient in terms of moisture reduction and/or solids recovery. Many coal preparation plants are forced to discard fine coal particles because …
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Geotextile Tubes and Their Application to Dewatering
… and minimal impact to the environment for dewatering of sediment or sludge from dredging operations. Common applications include: removal of solids from municipal water and waste water treatment, agricultural remediation, marine dredging operations, construction dewatering, and beach …
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Evaluation of Novel Fine Coal Dewatering Aids
… is associated with the difficulty in fine coal dewatering. Therefore, the availability of efficient of fine coal dewatering methods will greatly benefit companies. In the present study, three different novel dewatering aids have been tested. These include Reagents W (RW), Reagent U (RU), and …
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Scale-up of Using Novel Dewatering Aids
… in filter cakes and, thus, cause slower dewatering kinetics. As a result, dewatering costs for fine particles are much higher than for dewatering coarse particles. Considering the technical and economic issues associated with dewatering coal and mineral fines, an extensive matrix of …
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Developing a Novel Ultrafine Coal Dewatering Process
Dewatering fine coal is needed in many applications but has remained a great challenge. The hydrophobic-hydrophilic separation (HHS) method is a powerful technology to address this problem. However, organic solvents in solvent-coal slurries produced during HHS must be recovered for the method to be …
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Conditioning and Dewatering Behavior of ATAD Sludges
… However the large polymer costs associated with dewatering these sludges has made the use of this technology unfavorable. Several studies have been conducted in the past which have looked into the mechanism leading to such a poor dewatering of sludge. Some of these studies have attributed the …
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Advanced Chemical-Mechanical Dewatering of Fine Particles
In the present work, novel dewatering aids and a novel centrifuge configuration were developed and applied for the purpose of dewatering fine particles. Three different types dewatering reagents were tested in different filtration and centrifugation units. These chemicals included low-HLB …
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Predicting dewatering equipment performance from laboratory tests
This study was undertaken to evaluate the dewatering characteristics of a bench-scale belt filter press and a full-scale screw press, and to develop a suitable bench-scale test to simulate dewatering in a full-scale screw press. Tests were conducted to determine the effect of pressure and shear on …
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Biodegradation and Dewatering of an Industrial Waste Oil
… (GC) analyses with extractable material. Dewatering of biodegraded oil was measured using capillary suction test (CST), time to filter (TTF), and percent cake solids. Batch 1 examined the role of bioaugmentation by comparing a 10% waste oil mixture that was augmented with a mixture of …
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Municipal sludge dewatering using a belt filter press
Experiments were performed on alum, anaerobically digested and aerobically digested sludges to determine the optimum polymer conditioning for a belt filter press The optimum polymer dosages for all three zones of a belt filter press were compared with each other to determine the best overall …
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Cleaning and Dewatering Fine Coal using Hydrophobic Displacement
… and performed hydrophobic displacement during dewatering, not cleaning. A procedure was also developed for determining moisture content from evaporation curves so that the contents of water and pentane remaining in a sample could be accurately distinguished. Two primary coal samples were …
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Measuring faecal sluge stabilization and its relation to dewatering performance.
Stabilization and dewatering are indispensable treatment mechanisms applied in the management of Faecal Sludge (FS) that accumulates in onsite containment facilities such as pit latrines and septic tanks. This is because FS is mainly comprised of 80 – 95 percent water and readily degradable organic …
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Measuring faecal sluge stabilization and its relation to dewatering performance.
Stabilization and dewatering are indispensable treatment mechanisms applied in the management of Faecal Sludge (FS) that accumulates in onsite containment facilities such as pit latrines and septic tanks. This is because FS is mainly comprised of 80 – 95 percent water and readily degradable organic …
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DEM-based numerical simulation of drainage plows and dewatering trenchers
… is further extended to the investigations of a dewatering trencher cutting through soil. The dewatering trencher is a drainage machine similar to a plow but employs a cutting chain instead of a mole. Cutting torque is evaluated to establish the foundation for future research. The chain motion is …
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Development of a Novel Fine Coal Cleaning and Dewatering Technology
The cleaning and dewatering of ultrafine (minus 44 micron) coal slurries is one of the biggest challenges faced by coal industry. Existing commercial technologies cannot produce sellable products from these ultrafine streams; therefore, the industry is forced to discard this potential energy …
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