biosolids-to-fertilizer Articles
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Modelling impacts of seasonal wastewater treatment plant effluent permits and biosolid substitution for phosphorus management in catchments and river systems
The issues of diffuse and point source phosphorus (P) pollution in river systems are presented using a catchment model to assess nutrient behaviour, seasonal effluent standards and biosolid substitution. A process-based, dynamic water quality model (INCA-P) has been applied to four UK catchments, namely, the Rivers Tywi, Wensum, Lunan and Hampshire Avon, to simulate water fluxes, sediments, ...
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Top Uses for Energy Recovered by Anaerobic Digestion
Anaerobic digestion treats high-strength wastewater streams while producing energy for a range of processes The wastewater treatment process called anaerobic digestion is the kind of flexible solution that is bringing the circular economy from the drawing board to reality. Not only is it capable of treating high-strength wastewater streams that might overload conventional municipal ...
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Soil fertilization with wastewater biosolids – monitoring changes in the ‘soil–fertilizer–plant’ system and phosphorus recovery options
The aim of this study is to establish changes that may occur after a prolonged application of wastewater sludge treated to biosolids, in the ‘soil–fertilizer–plant’ system. Thirteen experimental plots with different soil types planted with experimental crops were investigated in order to evaluate the suitability of these biosolids as soil conditioners and fertilizers. The biosolids were ...
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Responses to Internet misinformation
How do people figure out what is accurate and what is not? Science, involving diverse researchers reviewing data and repeating experiments, is the basis for understanding reality. Biosolids recycling has been the subject of such science. And we point to that science on our website, letting our readers decide. Recent Internet postings by Joseph Mercola, David Lewis, and others* - who imply ...
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The longer-term phytoavailability of biosolids-phosphorus
Phosphorus based nutrient management could limit biosolids application to rates based on crop fertilizer P recommendations (P-based rates). Determinations of biosolids P phytoavailability relative to inorganic P fertilizers are necessary when P-based rates are mandated. Previous shorter-term (≤4 mo) studies successfully distinguished P phytoavailability differences among biosolids, but the ...
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Eliminating PFASs from Biosolid Technology
After over six decades of PFAS chemical use, it has recently come to the attention of scientists, the public and policy makers that PFASs are harmful to the environment and human health. As a result, in 2021 the Environmental Protection Agency (EPA) stated they are taking “bold actions” to push for stricter regulations and formal protocols to manage the remediation of these ...
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Major Investment in PFAS Cleanup Projected
These dangerous ‘forever chemicals’ are found in water and food supplies Per- and polyfluoroalkyl substances (PFAS) are man-made chemicals that are so resistant to breakdown in the environment and the human body that they have earned the popular moniker “forever chemicals.” They are associated with low birth weight, immune and endocrine system interference, and cancer. ...
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Soil carbon sequestration resulting from long-term application of biosolids for land reclamation
Investigations on the impact of application of biosolids for land reclamation on C sequestration in soil were conducted at Fulton County, Illinois, where 41 fields (3.6–66 ha) received biosolids at a cumulative loading rate from 455 to 1654 dry Mg ha–1 for 8 to 23 yr in rotation from 1972 to 2004. The fields were cropped with corn, wheat, and sorghum and also with soybean and grass or fallowed. ...
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Evaluating Phosphorus release from biosolids and manure-amended soils under anoxic conditions
The solubility of P in biosolids and manures has been shown to influence the potential for dissolved P losses in runoff and leachate when these materials are land applied. As a result, some Mid-Atlantic US states have developed P source coefficients (PSCs) to account for differences in P solubility between fertilizers, manures, and biosolids in P risk assessment tools. The reliability of these ...
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Philadelphia Recycling Center case study
The Challenge An arm of the City of Philadelphia Water Department, the Biosolids Recycling Center (BRC) was in need of critical support. Consisting of a dewatering complex and a compost operation that utilized a portion of the dewatered biosolids (with the balance transported offsite for disposal), the BRC had an expired Title V air management operating permit and was at risk of regulatory ...
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Changing Biosolid Technology to Safely Remove PFAS Chemicals
Per and Polyfluoroalkyl substances (PFAS) are ubiquitous. Known as “forever chemicals,” the man-made carbon-fluorine bond is one of the strongest bonds found in nature. PFAS is fast to build up in humans, animals and the environment and very difficult to break down. These substances were developed in the 1940s and 50s and applied to products that range from cookware to dental ...
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