Determination of Biosolids Phosphorus Solubility and Its Relationship to Wastewater Treatment
| Autor: | Jeffrey G. White, Tarek N. Aziz, Deanna L. Osmond, Molly Jameson |
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| Rok vydání: | 2016 |
| Předmět: |
Biosolids
Surface water pollution chemistry.chemical_element 010501 environmental sciences Wastewater 01 natural sciences Waste Disposal Fluid Animal science Environmental Chemistry Dry matter Solubility Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Ecological Modeling Phosphorus 04 agricultural and veterinary sciences Pollution chemistry Environmental chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Sewage treatment Water Pollutants Chemical |
| Zdroj: | Water environment research : a research publication of the Water Environment Federation. 88(7) |
| ISSN: | 1061-4303 |
| Popis: | In North Carolina (NC), biosolids land application rates governed by crop nitrogen (N) requirements typically surpass crop phosphorus (P) needs, increasing surface water pollution potential. The NC Department of Environmental Quality (NCDEQ) is considering P-based biosolids application guidelines for some nutrient-impaired watersheds using the P Loss Assessment Tool (PLAT), but important biosolids information is lacking: total P (TP), water-extractable P (WEP), and percent water-extractable P (PWEP). In each of three seasons, we sampled 28 biosolids from 26 participating water resource recovery facilities (WRRFs) and analyzed for TP, WEP, and percent dry matter (DM), from which PWEP and nonsoluble P were calculated. Based on descriptive statistics and an online survey of treatment processes, biosolids were divided into Class A-alkaline, Class A-heat, Class B-slurry, and Class B-cake. The average TP in Class A alkaline stabilized biosolids was more than five times less than the average of the other biosolids, 5.0 vs. 26.6 g/kg, respectively. Averaged over biosolids, WEP and PWEP were 1.4 g/kg and 5.0%, respectively. Stabilization processes appeared to reduce WEP substantially, so biosolids potential soluble-P loss is low. Our data will allow PLAT to be used for biosolids P-loss risk assessments. |
| Databáze: | OpenAIRE |
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