Chemosphere
Universidad Nacional de Colombia - Sede Palmira, Facultad de Ingeniería y Administración, Departamento de Ingeniería, Cra. 32 No 12-00, Palmira, 763533, Colombia. Electronic address:
Published: March 2024
This study explores the potential of zeolite as an amendment to mitigate ammonium inhibition in the anaerobic digestion of swine waste. Two 50 L reactors, one with and one without zeolite amendment were operated at an OLR of 3.0 g VS Ld for 130 days, and fed with swine waste from a full-scale pig farm. Under these conditions, zeolite doses of 4 g L allowed total ammonia nitrogen (TAN) concentrations to be kept below 1000 mgNH-N L. The zeolite-amended reactor not only showed an average increase of 8% in methane production under stable conditions but also exhibited 34% reduction in HS concentrations in the biogas, compared to the reactor without zeolite. The community of archaea originating from the inoculum was conserved in the reactor with zeolite amendment, particularly the acetoclastic methanogens of the genus Methanosaeta. On the other hand, in the reactor without zeolite addition, the microbial community went from being dominated by the acetoclastic methanogen Methanosaeta to having a high relative abundance of hydrogenotrophic methanogens. The zeolite addition also favoured the reactor stability, prevented foaming, and produced an enriched natural zeolite with N, P and K. However, additional studies on the potential of enriched zeolite as a fertilizer are required, which could make the use of zeolite in Anaerobic Digestion of swine waste not only energetically favourable but also economically feasible.
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http://dx.doi.org/10.1016/j.chemosphere.2024.141517 | DOI Listing |
Bull Environ Contam Toxicol
January 2025
Sichuan Academy of Eco-Environmental Sciences, Chengdu, 610041, China.
The widespread application of swine-farming wastewater to soil and water is increasingly contributing to heavy metal contamination, posing significant environmental risks. This study investigated the concentrations of eight heavy metals in swine-farming wastewater following different treatment processes, and assessed their ecological risks in Sichuan Province, China. The findings revealed that zinc, copper and nickel exhibited the highest concentrations, potentially causing heavy or strong contamination levels and leading to heavy or slight ecological risks.
View Article and Find Full Text PDFAnal Chim Acta
February 2025
Department of Chemistry, University of Waterloo, Waterloo, ON, Canada. Electronic address:
Background: Normothermic ex situ heart perfusion (ESHP) has emerged as a valid modality for advanced cardiac allograft preservation and conditioning prior to transplantation though myocardial function declines gradually during ESHP thus limiting its potential for expanding the donor pool. Recently, the utilization of dialysis has been shown to preserve myocardial and coronary vasomotor function. Herein, we sought to determine the changes in myocardial metabolism that could support this improvement.
View Article and Find Full Text PDFEnviron Res
January 2025
School of Chemistry and Environmental Engineering, Hubei Minzu University, 39 College Road, Enshi, 445000, China. Electronic address:
Recovery of phosphate from swine wastewater is significant for alleviating eutrophication in aquatic ecosystems and addressing the increasing scarcity of phosphorus resources. In this study, a method for phosphate recovery from swine wastewater using corn carbon as an additive and non-dynamic magnesium metal self-corrosion was studied. The effects of reaction time, C:Mg mass ratio, stirring rate, and aeration rate on phosphate recovery were discussed, and eight experimental models were explored.
View Article and Find Full Text PDFSci Rep
January 2025
Microbiota Lab, Department of Pharmaceutical Biology, Medical University of Warsaw, 1 Banacha St., Warsaw, 02-097, Poland.
The study addresses the utilization of food waste by-products from faba bean (Vicia faba L.) pods (FBP) as an alternative feed supplement to promote sustainable piglet growth by reducing antimicrobial use. Objectives include evaluation of FBP in terms of nutritional components (proximate composition, fibres, minerals), phytochemical composition (total phenols, HPLC-MS profiling), and in vitro biological activities.
View Article and Find Full Text PDFEnviron Res Health
March 2025
Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, United States of America.
North Carolina (NC) ranks third among US states in both hog production and hurricanes. NC's hogs are housed in concentrated animal feeding operations (CAFOs) in the eastern, hurricane-prone part of the state. Hurricanes can inundate hog waste lagoons, transporting fecal bacteria that may cause acute gastrointestinal illness (AGI).
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