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Biosolids Management for the Sustainable Development of Puerto Rico

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Wastewater treatment processes produce nutrient-rich organic materials as a by-product of the treatment processes. Puerto Rico generates over 35 thousand dry metric tons of residuals annually. The Puerto Rico Aqueduct and Sewer Authority (PRASA) currently use various methods for residuals management across the island. The majority of the wastewater treatment plant residuals are disposed of in landfills, a practice which will no longer be acceptable as landfills are reaching their capacities. Consequently, PRASA's objectives are to reduce the volume of residuals, produce biosolids that can be beneficially reused thereby helping to improve soil fertility by decreasing the use of inorganic fertilizers. The Island Wide Biosolids Management Plant (IWBMP) was developed to address the management of residuals from 61 wastewater treatment plants (WWTPs) to provide a pathway towards a more sustainable program. The foundation of this plan relies primarily on incineration and composting, two well understood and island proven technologies.
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Keywords: biosolids; composting; incineration

Document Type: Research Article

Publication date: 2009-01-01

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