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At the July 2021 meeting of the American Association of Plant Food Control Officials (AAPFCO; Arlington, Virginia), the organization recognized a new method to measure water-extractable phosphorus (WEP) for fertilizer products. The results from this method highlight the slower release of phosphate-phosphorus from biosolids-based (and other carbon-based) products. AAPFCO also determined that making labeling claims of slowly available phosphate for carbon-based products was allowable.
To provide further clarification on the virus that causes COVID-19 infections and concerns about how it relates to residuals, sludge, and biosolids for water resource recovery facilities (WRRFs) as well as the wastewater sector at large, this article includes a review of available data related to the virus and surrogates as well as their potential associations with residuals, sludge, and biosolids.
Envision is a guide for optimizing resiliency and sustainability in the design, construction and delivery of infrastructure. Envision sets the standard for sustainable infrastructure and is a growing paradigm. It provides continuity for stakeholder communications and encourages enhanced project performance by providing means to quantify sustainable practices with standardized, nationally recognized metrics, incorporate sustainability and resiliency philosophies into infrastructure projects, quantify soft benefits of sustainable and resilient infrastructure, strengthen interdepartmental and interagency cooperation and improve infrastructure integration . This fact sheet introduces Envision, illustrates its use through four wastewater utility case studies, and provides an overview of the Envision process.