2016 journal article
Determination of Biosolids Phosphorus Solubility and Its Relationship to Wastewater Treatment
WATER ENVIRONMENT RESEARCH, 88(7), 602–610.
author keywords: biosolids; phosphorus content; water extractable phosphorus; land application; stabilization processes; wastewater
MeSH headings : Phosphorus / analysis; Solubility; Waste Disposal, Fluid; Wastewater / analysis; Water Pollutants, Chemical / analysis
TL;DR:
Stabilization processes appeared to reduce WEP substantially, so biosolids potential soluble-P loss is low, and this data will allow PLAT to be used for biosolid P-loss risk assessments.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger
(Web of Science)
6. Clean Water and Sanitation
(OpenAlex)
Source: Web Of Science
Added: August 6, 2018
ABSTRACT: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.