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[en] The purpose of this research is to development of technologies for 1) the removal of toxic organic chemicals in sewage sludges and the volume reduction of the sewage sludge 2) the recycling/reuse of sewage sludge 3) the reconvey of resource from fishery waste by using radiation technologies. This research project focused on the study of treatment, disposal, and recycling/reuse of sewage sludge by radiation technology, and recovery of highly value-added resources from the wastes. As basic studies with a radiation technology, an enhancement of dewaterbilities of sewage sludge, development of dewatering conditioner, reduction of trace toxic organic chemicals, and the toxicities of the byproducts were studied. Based on the basic experimental results, we developed the pilot-scale system with the continuous e-beam and dewatering unit and the advanced treatment system with the use of carbon source recovered from sewage sludge
[en] The data and analyses contained in this report reflect the initial characterization of construction and consolidation water in Cells 5 and 6 lysimeters. Therefore, the scope of this report will be to establish constituent levels and document dewatering activities completed to date.
[en] The data and analyses contained in this report reflect the initial characterization of construction and consolidation water in Cells 5 and 6 lysimeters. Therefore, the scope of this report will be to establish constituent levels and document dewatering activities completed to date
[en] Complete text of publication follows. Tectonic processes affect the creation, destruction, and mobilization of magnetic materials within the lithosphere of the Earth. The scale of these processes dictates the appropriate observation platform. In the near surface, volcanism and related igneous processes such as dike emplacement, rifting, and faulting act to modify pre-existing magnetic signatures, thus providing critical details of the processes involved. Within the mantle and deep crust, subduction processes produce serpentinite by the dewatering of subducting slabs. This produces highly magnetic but light material, and affects not only magnetic and gravity signatures, but also seismic behavior and properties of the slab and overlying materials. This has important implications for seismic risk assessment. The thickness of the terrestrial magnetic crust can also be related to tectonic processes. On the largest scale, diffuse plate boundary zones within continents are seen to have thinner crust than continental regions away from these zones. On intermediate scales, thickness variations are associated with rifting, and regions with enhanced heat flows.
[en] In this study, dewatering performance-based sheets are attached to the inside of form in order to improve the durability of structures in N.P.P(nuclear power plants) through concrete surface enhancement. Then, the influence of dewatering sheet by removing the residual water inside the concrete analyzed on the strength
[en] An efficient procedure is reported for Cr(III) removal from tannery waste waters by means of natural and chemically treated bentonites. The best result was obtained using 20 mL of effluent with 7.5 grams of Bentonite. With this quantity it was removed the total amount of chromium III present in the sample
[en] Dewatering electrolysers are useful devices for efficiently reducing the water content of sewage sludge to e.g. IrO2-coated titanium electrodes, cause a main cost of such devices. In this paper, iridium oxide (IrO2) coatings are electrodeposited on titanium to prepare the anodes. The loading amounts and morphologies of these IrO2 deposits are varied by tuning parameters such as the electrodeposition potential, concentration of Iridium salts, and deposition time. An amorphous iridium oxide was obtained after electrodeposition, which was successively calcined at 500 °C. In the sludge electrodewatering test, the electrodeposited IrO2/Ti electrodes with an ultra small IrO2 loading level (0.3 mg cm−2) shows acceptable performance, i.e. the water content of sludges in the electrodewatering system can be reduced to about 60 wt% at 25 V and 55% at 35 V.
[en] Freeze drying is a water removal method that is based on solid phase to gas phase route, as opposed to the normal heat drying that is based on liquid phase to gas phase route. It is typically used to preserve high value perishable materials, such as drugs, pure honey, and fruits and for the convenience of storage and transport such as foods for astronomers. The principle behind freeze drying is by freezing the sample and lowering its partial pressure, under the low partial pressure system, water molecules in the form of gas are sucked by a vane pump and trapped at a cold trap. As sophisticated as it is, understandings on its key operational procedure are widely lacking among students, technicians, and researchers alike, causing unnecessary downtime and costly repair. This contribution is aimed towards sharing the experience and knowledge among freeze dryer users in Malaysia Nuclear Agency. It is hoped that this work can lead towards the optimum usage of freeze dryers in the agency. (author)
[en] Freeze-thaw dewatering design concepts for oil sands fine tails were described. Design models were presented, based on recent laboratory and field data that quantitatively outlined the volume separation and strength development associated with thin layered freeze-thaw dewatering strategies. The design calculations using these models predict that reclamation of the fine tails to a dry landscape was viable. For existing operations, it was shown that it was possible to freeze more tails than would thaw. A volume separation approaching 70% was estimated after five cycles of yearly placing, freezing and thawing. A prototype field freezing experiment was described and showed a 60% volume separation after one freeze-thaw cycle. 12 refs., 19 figs
[en] Since at least August 2012, Hanford Tank 241-AY-102 (AY-102) has been leaking from its primary tank into its secondary containment. A pumping plan was developed in 2013 to provide a path forward for recommended remediation actions to be implemented as part of the AY-102 Recovery Project. On March 21, 2014, the Washington State Department of Ecology issued Administrative Order No. 10618 requiring Washington River Protection Solutions and the United States Department of Energy to conduct actions related to and including the removal of waste from AY-102. The three parties agreed to resolve the appeal of the Administrative Order through a Settlement Agreement which addresses the remaining requirements and implements enforceable milestone dates, including initiation of waste retrieval by March 4, 2016 and completion of waste retrieval operations by March 4, 2017. The AY-102 Recovery Project was developed to address the Settlement Agreement requirements. While retrieval of waste from Single-Shell Tanks has been performed at Hanford for decades, retrieval from Double-Shell Tank AY-102 required adaptation of the existing technologies to a new environment on a larger scale than previously encountered. A significant number of obstructions and in-tank equipment limit accessibility to the high source term AY-102 waste and the location of the selected receiver tank required installation of an extensive, heavily-shielded above-ground transfer line. Despite countless challenges and obstacles encountered throughout, the project successfully completed system design, fabrication, installation, testing, and the first phase of operations within a highly compressed, aggressive schedule. Waste retrieval operations in AY-102 commenced on March 3, 2016 and the initial operating phase concluded on April 30. Additional sluicing capability was required to complete the mission and four Extended Reach Sluicers were installed to support the second operating phase, which began on December 8, 2016. As of December 31, 2016, approximately 97% of the original waste volume had been removed, resulting in an estimated remaining waste volume of about 75,000 liters. (authors)