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 22 for “"dewater"”.
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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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Accounting for Remaining Injected Fracturing Fluid
… for low load recovery include ineffective dewatering of the propped fractures, matrix pore scale water retention related to imbibition, capillary fluid retention, relative permeability, and water held up in a fracture network (complexity) opened or reopened during fracture treatments. This …
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Alum treatment of caustic wash from chlorine bleached kraft pulp
… if a centrifugal separator could be used to dewater the sludge from the Dorr underflow. Approximately 5000 gallons of caustic wash from chlorine bleached kraft pulp was used for each phase of this investigation. The raw waste feed flow rate was varied from 1750 pounds per hour to 2499 Pounds …
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Floc density measurement and the effects of microproperty variations on sludge dewatering characteristics
The dewatering characteristics of sludges produced by water and wastewater treatment plants bear heavily on the methods chosen to treat and dispose of the sludge, as well as on the costs associated with handling the large volumes of sludge produced at these facilities. This study investigated why …
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Design and Testing of a Hyperbaric Horizontal Belt Filter for Fine Coal Dewatering
… objective of this project was to develop a new dewatering device that could produce a lower moisture content and better fine particle recovery than current technology. To meet this goal, a hyperbaric horizontal belt filter was designed and constructed over the course of 18 months. Once built, …
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Greenhouse and laboratory study for the land application of water treatment residual
… residual directly into nearby water courses or dewater them for landfilling. If suitable land is available, land application of residual is cost effective and has the potential for negligible effects on the environment and may prove to be a long-term solution to the disposal problem. This …
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The Production of Low Ash Coals Using the Hydrophobic-Hydrophilic Separation Process with Novel Developments
… HHS uses an organic solvent to separate and dewater hydrophobic particles from hydrophilic minerals. Past work on the HHS process yielded promising results. In particular, the HHS process has produced a low-ash (<2%) and low moisture (<8%) product, which makes it viable for a feed stock for …
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The kinetics and mechanisms of the oxidation and precipitation of iron : the high density sludge (HDS) process
… of gelatinous sludge which is difficult to dewater, the low solids density resulting in considerable water losses and a large land area for sludge disposal, the instability of the sludge thus requiring post neutralisation stabilisation and the formation of the solids as mixed sludge, thus …
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Alternative primary treatment for energy-positive wastewater treatment: an exploration of pile cloth media filtration
… a modified PCF technology that is designed to dewater solids prior to removal, the dewatering pile cloth filter (DPCF). It then compares the characteristics of municipal wastewater treatment with traditional PCF, DPCF and CPS, followed by secondary activated sludge processes in sequencing batch …
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Lower Scotts Creek Floodplain and Habitat Enhancement Project
… of the streambed/banks and the need to dewater or divert the stream during construction.</p> <p>Project performance, changes to physical habitat characteristics, and changes to stream morphology associated with implementation were monitored using habitat assessment methods derived from …
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Properties of Waste Resulting from Arsenic Removal Processes in Drinking Water Treatment
… that leaches in common residual handling and dewatering processes, and the hazardous potential of the residuals. Residual samples were collected from seven utilities with high arsenic concentrations in their raw water. Included in the study were four plants that coagulate with ferric chloride, …
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The Effects of Federal Fiscal Programs on Economic Activity
Made available in DSpace on 2014-12-05T21:04:12Z (GMT). No. of bitstreams: 1 0010560.pdf: 11617731 bytes, checksum: e38168ef09e8a2cee72f6e0b1eb2fb3e (MD5) Previous issue date: 1954
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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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A study of fine coal dewatering by high temperature and pressure filtration
… directed towards the development of a method to dewater fine coal by the application of high temperature and pressure to a filter slurry. This method might have the possibility of replacing conventional thermal dryers for fine coal drying. In addition, the effect of temperature, pressure, dry …
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Development and Testing of a Mobile Pilot Plant for the Advancement and Scale-up of the Hydrophobic-Hydrophilic Separation Process
… waste impoundments as the costs to recover and dewater these materials are prohibitive. The Hydrophilic Hydrophobic Process (HHS) is one alternative to flotation that uses a recyclable solvent, rather than air bubbles, to selectively recover fine hydrophobic particles. Prior laboratory, …
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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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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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Identification of Improved Stratigies for Processing Fine Coal
… on evaluating a new mechanical, non-thermal dewatering process called Nano Drying Technology (NDT™). Experimental results obtained from bench-scale testing showed that the NDT™ system can effectively dewater fine clean coal products from more than 30% surface moisture to single-digit moisture …
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Improved strategies for processing fine coal streams
… on evaluating a new mechanical, non-thermal dewatering process called Nano Drying Technology (NDT"). Experimental results obtained from bench-scale testing showed that the NDT" system can effectively dewater fine clean coal products from more than 30% surface moisture to single-digit moisture …
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