| Description |
x, 105 leaves : illustrations ; 29 cm |
| Summary |
"This study was conducted to determine the technological feasibility of using a tube transport (pipeline) system to supplement and partially eliminate the present inadequate solid waste collecting and transporting techniques employed in most cities throughout the United States. Specific objectives were to develop a practical pipeline system for the transport of refuse by means of a fluid and to determine the uniformity of composition of refuse. The hydrodynamic characteristics of each transport medium, water and Chemical Emulsion., W-4088, were to be determined also. Another item of interest was the degree of grinding necessary to transport refuse by pipeline. An experimental tube transport pilot plant model was constructed in a building at the University of Missouri-Rolla. The basic equipment consisted of a Bulldog .Hammermill, a Moyno sewage sludge pump, a 20 horsepower electric motor and a 100 foot loop of four-inch PVC piping. A quantity of refuse from a rural area of Rolla, Missouri, was obtained and hand sorted to determine its composition. The results were then compared with figures established throughout the United States. Refuse used for the flow studies was shredded in the hammermill until it was reduced to a maximum size of 3/4 inch. The ground waste was then placed in a 300-gallon reservoir where it was mixed with the transporting liquid. This mixture was then pumped around the circuit for sufficient time to obtain the required hydrodynamic characteristics. To determine head loss values, a Dwyer manometer and three Ashcroft pressure gauges with chemical seals were used. The refuse study indicated that, for a given area, the composition of refuse can be predicted within reasonable limits. The Bulldog Hammermill ground all refuse components adequately, with the exception of soft plastic bottles, and the Moyno sewage sludge pump was found capable of transporting refuse slurries with a minimum of wear to the moving parts. The hydrodynamic characteristics established that the chemical emulsion exhibited a larger head loss than that of water for the range of flow rates studied. The water yielded a higher rate of increase in head loss, however. For the range of flow rates investigated, water would be more economical and easier to handle as a transporting fluid. If the percentage of refuse to be transported was very high, water could not be used as a carrier. The emulsion, however, is capable of transporting much higher percentages of payload (up to 50 percent by volume)"--Abstract, leaves ii-iii. |
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