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Organic micropollutants, heavy metals and pathogens in anaerobic digestate based on food waste

Golovko, Oksana and Ahrens, Lutz and Schelin, Jenny and Sörengård, Mattias and Bergstrand, Karl-Johan and Asp, Håkan and Hultberg, Malin and Wiberg, Karin (2022). Organic micropollutants, heavy metals and pathogens in anaerobic digestate based on food waste. Journal of Environmental Management. 313 , 114997
[Research article]

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Abstract

Anaerobic digestate based on food waste is increasingly used as fertilizer in food production. This study examined the characteristics of anaerobic digestate based on food waste from three biogas plants in Sweden. The characterization included measurements of heavy metals (n = 7), chemicals of emerging concern (CECs), such as currently used drugs and pesticides (n = 133), and an extended range of food-borne pathogens, including two notable sporeformers and some widespread antibiotic-resistant bacteria. The amounts of Escherichia coli, enterococci, and Salmonella and the concentrations of the target heavy metals were all below the maximum accepted levels at all three locations studied. However, the spore-forming Bacillus cereus was found to be present at high levels in samples from all three biogas plants. Among the 133 CECs investigated, 48 were detected at least once, and the highest concentrations were found for pyroxidine, nicotine, caffeine, theobromine, and nicotine. The biofertilizers from the different biogas plants had similar CEC profiles, which indicate similarities in household waste composition and thorough mixing in the biogas plants. If this profile is found to be spatially and temporally consistent, it can help regulators to establish priority lists of CECs of top concern. Assuming increasing use of biofertilizers for food production in the future, it would be beneficial to have concentration limits for CECs Risk estimation based on risk quotients (RQs) indicated generally low environmental risks associated with application of biofertilizer to soils for food crop production. However, the toxicity of CEC mixtures needs to be considered when estimating the risks from application of biofertilizers on agricultural land or in other production systems.

Authors/Creators:Golovko, Oksana and Ahrens, Lutz and Schelin, Jenny and Sörengård, Mattias and Bergstrand, Karl-Johan and Asp, Håkan and Hultberg, Malin and Wiberg, Karin
Title:Organic micropollutants, heavy metals and pathogens in anaerobic digestate based on food waste
Series Name/Journal:Journal of Environmental Management
Year of publishing :2022
Volume:313
Article number:114997
Number of Pages:7
Associated Programs and Other Stakeholders:Z - SLU - Library > Odla mera
ISSN:0301-4797
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Keywords:Biofertilizer, Food waste, Risk assessment, Heavy metals, CECs
URN:NBN:urn:nbn:se:slu:epsilon-p-116903
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116903
Additional ID:
Type of IDID
DOI10.1016/j.jenvman.2022.114997
ID Code:28256
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
(LTJ, LTV) > Department of Biosystems and Technology (from 130101)
Deposited By: SLUpub Connector
Deposited On:07 Jun 2022 13:26
Metadata Last Modified:08 Jun 2022 04:00

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