Double pond

Construction of Ponds. Three ponds were made by spraying the formulation on formed soil. Two small, shallow ponds of 65 and 350 gal capacity were constructed to determine the best method of applying the coating to obtain an impervious lining. A larger, double pond was then excavated and formed in the ground. The completed form for the double pond is shown in Figure 9. The double pond has a capacity of 3750 gal... 

Results. The monolithic coating of the spray formulation applied to the double pond covered both the liquid-containing area, the top and outside edges, and also formed the spillway between the two ponds. After several days, some cracks developed in the coating at the top inside... 

Figure 9. Aerial view of the full scale wetland at the Pohla site. The double-line structure can be clearly seen, with one line in the upper part of the photograph and the second line in the lower. In the left lower comer, the aeration cascade is visible, followed by the rectangular settlement pond (concrete stmcture).

Contaminated water from the phosphate fertilizer subcategory A is collected in gypsum ponds and treated for pH adjustment and control of phosphorus and fluorides. Treatment is achieved by double liming or a two-stage neutralization procedure, in which phosphates and fluorides precipitate out [7]. The first treatment stage provides sufficient neutralization to raise the pH from 1 to 2 to a pH level of at least 8. The resultant effectiveness of the treatment depends on the... 

Limited predictions, about vibration can be made based upon the mass of ffie Atoms involved and the stiffness of the bond between them. Atoms with greater mass resonate at lower frequencies stiffer bonds, such as double and triple bonds, resonate at higher frequencies. Pond strength and bond stiffness follow the same order sp >... 

The plankton was collected from several ponds situated in the vicinity of the river Po. The ponds were fed by the Po water downstream to a power plant. The relatively high water temperature accelerated plankton growth, allowing the collection of the total amount necessary for the reference material within a relatively short period. The collection was done with a manually-operated net with 125 pm apertures. The wet material collected was packed in double-layer polythene bags and kept at -20 C until freeze-drying. 

Henderson pointed out another property of water its high surface tension, which is substantially higher than that of any other common liquid except mercury. This curious property allows water striders to walk across the surface of ponds or, as a parlor trick, partyers to float a double-edged razor blade in a bowl of water. More important, this property helps water to flow upward, against the force of gravity, in the tiny veins of even tall plants. 

A typical drum dryer—a double-drum unit with center feed— is shown in Fig. 24.17. Liquid is fed from a trough or perforated pipe into a pool in the space above and between the two rolls. The pool is confined there by stationary end plates. Heat is transferred by conduction to the liquid, which is partly concentrated in the space between the rolls. Concentrated liquid issues from the bottom of the pond as a viscous layer covering the remainder of the drum surfaces. Substantially all the liquid is vaporized from the solid as the drums turn, leaving a thin layer of dry material that is scraped off by doctor blades into conveyors below. Vaporized moisture is collected and removed through a vapor head above the drums. 

Based on the excellent results of pond trials in 1991, aU US shrimp ponds were stocked with High Health PL in 1992. Total production of the US industry doubled as a direct result of this innovation. Use of High Health shrimp in commercial farms increased production and survival, improved feed conversion ratio (FCR) and narrowed harvest size distribution all of which contributed to increased profitability. In addition to increased production, use of High Health shrimp reduced incidence of shrimp disease. It was predicted that the shrimp farming problems that were solved by use of SPF shrimp in the US industry could be duplicated elsewhere (Wyban et al., 1992). 

ICVD cannot be used when fuel is stored in canisters. Furthermore, absorption and reflection of the Cherenkov light caused by additives or particles in the water and its turbulence in spent fuel ponds may result in failure to verify the spent fuel. It is also difficult to see fuel assemblies that are double-stacked in the storage pool. 

The 1324-N Surface Impoundment shown in Figures 3-21, 3-22, and 3-23 was constructed in 1986 and was used to neutralize corrosive ion exchange regeneration waste water from the 163-N Demineralization Facility. The surface impoundment is a double-lined pond with leak-detection capability between the two liners. The surface impoundment is situated over a previously used unlined north settling pond. Figure 3-24, that had received unneutralized regeneration waste water from the 163-N Demineralization Facility from 1977 to 1986. The 1324-N Surface Impoundment is 23 m by 43 m by 4.5 m deep (75 ft by 140 ft by 15 ft deep). 

The gaps under cones are usually around half the pond depth. However, much smaller gaps have been used in vegetable oil refining (in a three-phase decanter). Uniquely in vegetable oil refining a double concentric cone has been used where the caustic soda wash is fed between the cones, rhe wash exits at the periphery of the cones under the surface of the oil. 

Method of using cooling water defined (open recirculated, salt water, double exchange, ponds, air cooling) ... 

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