Title: Wastewater reclamation at St. Croix, U. S. Virgin Islands
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00099532/00001
 Material Information
Title: Wastewater reclamation at St. Croix, U. S. Virgin Islands
Physical Description: xii, 348 leaves : ill. ; 28 cm.
Language: English
Creator: Buros, Oscar Krisen ( Dissertant )
Singley, Edward E. ( Thesis advisor )
Sholtes, Robert S. ( Reviewer )
Bleiweis, Arnold S. ( Reviewer )
Smith, Paul H. ( Reviewer )
Furman, Thomas de S. ( Reviewer )
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 1975
Copyright Date: 1975
Subjects / Keywords: Saint Croix (V.I.)   ( lcsh )
Environmental Engineering Sciences thesis Ph. D   ( local )
Water reuse -- Virgin Islands of the United States -- Saint Croix   ( lcsh )
Dissertations, Academic -- Environmental Engineering Sciences -- UF   ( local )
Genre: bibliography   ( marcgt )
non-fiction   ( marcgt )
Abstract: St. Croix is the largest island in the Territory of the U.S. Virgin Islands which are located 1,100 miles (1,770 km) southeast of Miami, Florida. The increased water consumption on St. Croix caused by an expanding population and a rising standard of living has seriously depleted the island's limited freshwater reserves. Several seawater desalinization plants have been built on the island to produce potable water but they are very expensive to operate. In order to conserve what water is available the concept of water reuse was proposed in 1968. This developed into a wastwater reclamation project which began work in 1971 to ascertain the technical and economic feasibility of employing wastewater effluent so as to increase the island's freshwater resources. The major use was to be for the artificial recharging of the groundwater. The wastewater reclamation project on St. Croix has demonstrated that it is possible to economically augment the island's freshwater reserves through the use of reclaimed wastewater for the artificial recharge of groundwater. The most successful method of recharge has been with the use of spreading basins in Estate Golden Grove. The project has spanned close to 4-1/2 years and has resulted in the construction and operation of an advanced wastewater treatment plant and recharge facilities which can process up to 0.5 mgd (1,892 cu ni/day). Investigation of the geology, hydrology, and groundwater movement in the area and the compilation of considerable data on treatment plant operations, recharge activity, well water quality, and groundwater quantity has been completed. After numerous delays in the construction of the treatment plant, recharging operations began in February, 1974. During the subsequent 8 months various minor problems in the system were resolved and plant production steadily increased until in October, 1974, it was possible to recharge an average of 1 mil gal/wk (3,785 cu m/wk). The restriction at that point was caused by a lack of wastewater influent. Of the two recharge sites utilized it was possible to eliminate one and focus all attention on the most feasible site at Estate Golden Grove. At the recharge rate used in Golden Grove, no significant adverse effects were observed in the groundwater extracted downstream of the project. There was, however, evidence of a notable increase in available groundwater in the vicinity of the recharge activities. The major problems experienced during the project's operational phase were: 1. The lack of sufficient wastewater for treatment and subsequent recharge. 2. The mechanical failure of equipment associated with the treatment process. 3. The transfer, to the central treatment plant, of wastewater containing a high percentage of seawater. This last problem, followed immediately by a record flood on the island, caused the premature termination of the recharge activities in October, 1974. Although the flood damage has been repaired, it is not expected that the saltwater problem will be resolved until the latter part of 1975. At that time it will be possible to resume the artificial recharge activities. Using the present facilities for treatment and recharging it isestimated that recoverable groundwater could be increased by at least 0.3b mgd (1,351 cu m/day) at the recovered water cost of about $2.15/ thousand gal ($0.56/cu m). Although this is considerably higher than the $Q.30/thousand gal ($0.08/cu m) estimated for recovering the limited amount of groundwater, it is much cheaper than the cost of $5. 16/thousand gal ($1.36/cu m) for water produced by the government's desalinization plant on the island and additionally it will provide a dependable source of fresh water for St. Croix.
Statement of Responsibility: by Oscar Krisen Buros.
Thesis: Thesis--University of Florida.
Bibliography: Bibliography: leaves 341-346.
General Note: Typescript.
General Note: Vita.
 Record Information
Bibliographic ID: UF00099532
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: alephbibnum - 000175759
oclc - 03039816
notis - AAU2235


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