A review of the existing solids management practices in Trinidad and Tobago and experience elsewhere defined the future needs and identified solar drying as a preferred technology for the subject project. Upon analysis of the local conditions, it was calculated that approximately 19 MJ/m 2 (1886 kWh/m²) of solar radiation, at 30ºC annual average temperature and 80% relative humidity level is appropriate at the project site and that these parameters are adequate for the solar dryer application. The estimated 7,450 m 2 cell area for drying associated with average electrical power consumption of 18 to 20 kWh/tonne of water extracted will provide an evaporation rate of 2.2 kg water/m 2 .day. The solids are expected to be dried from approximately 16-18% dry solids to 70-90% dry solids.
Trinidad and Tobago, an island republic in the southern Caribbean, is pursuing developed nation status by the year 2020. Aware that functional and well-maintained infrastructure is a major factor in this goal, the Water and Sewerage Authority (WASA) of Trinidad and Tobago recently commissioned a Master Plan Study for national wastewater services. Health, prosperity, and social progress in any country are, to a great extent, dependent on cleanliness.One initiative of the government of Trinidad and Tobago is to provide wastewater collection and treatment to 75 percent of the population. A second expressed desire of the government was to have the utility sector be modern, customer oriented and technologically enabled to provide efficient, cost effective, quality services to all citizens. Satisfying these goals for Trinidad's second-largest city, San Fernando, can lead the way in achieving results for all of Trinidad, and provide a sustainable pattern for continued improvement of facilities and infrastructure. This paper will describe the design of an integrated wastewater collection system and tertiary wastewater treatment plant to serve the city of San Fernando and its environs.
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