Pilot-Scale Evaluation of Poultryponics: Insights into Nitrogen Utilization and Food Pathogen Dynamics.

Autor: Arthur W; Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States., Morgan Z; Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States., Reina Antillon M; Department of Poultry Science, Auburn University, Auburn, Alabama 36849, United States., Drabold E; Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States., Wells DE; Department of Horticulture, Funchess Hall, Auburn University, Auburn, Alabama 36849, United States., Bourassa DV; Department of Poultry Science, Auburn University, Auburn, Alabama 36849, United States., Wang Q; Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States., Higgins BT; Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States.
Jazyk: angličtina
Zdroj: ACS ES&T water [ACS ES T Water] 2024 Aug 02; Vol. 4 (9), pp. 3964-3975. Date of Electronic Publication: 2024 Aug 02 (Print Publication: 2024).
DOI: 10.1021/acsestwater.4c00262
Abstrakt: Poultry processing wastewater (PPW) is a nutrient-rich effluent with the potential for reuse in crop irrigation. This study investigated transforming PPW into a hydroponic nutrient solution using a pilot scale "poultryponics" system operated continuously for 222 days. The system treated ∼57 L d -1 of real PPW and consisted of bioreactors (inoculated with a consortium of microalgae and nitrifying bacteria), clarifiers, membrane filters, a UV disinfection unit, and a deep-water hydroponic system. The system was evaluated in terms of nitrogen transformation, organic removal efficiency, and pathogen levels. Although soluble organic removal efficiencies (sCOD) were high (>80%) in all bioreactors, nitrification was limited due to high organic loading (350-800 mg sCOD L -1 ), relatively short retention time (24 h), and low dissolved oxygen levels (<3.5 mg O 2 L -1 ). Grow beds showed significant nitrification, indicating the importance of upstream organic removal. CO 2 supplementation (0.5% v/v) in bioreactors did not promote nitrification in the bioreactors but was beneficial for nitrification in grow beds due to pH-modulating effects. Microbiological analyses showed no Salmonella detection in bioreactors and substantial reductions in total coliform (∼40%) and aerobic plate counts (∼30%) after UV treatment. These findings demonstrate the sustainable and safe reuse of nutrient-rich industrial effluents in agriculture.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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