Occurrence of hazardous organic compounds and pharmaceuticals in biogas plant digestate and evaluation of the risk caused for the food production chain
| Main Author: | MTT Agrifood Research Finland |
|---|---|
| Format: | Report Journal |
| Terbitan: |
, 2014
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/851801 |
Daftar Isi:
- In this study, the concentrations of hazardous organic compounds and pharmaceuticals in biogas plant digestates were analyzed. In addition, the risk for food safety, caused by the use of digestate as a fertilizer in agriculture, was examined. Most of the centralized Finnish biogas plants, which used various waste materials as substrate, took part in the study. The following groups of organic compounds were analyzed: polychlorinated dibenzo-p-dioxins and –furans (PCDD/F), polychlorinated bifenyls (PCB), polyaromatic hydrocarbons (PAH), bis(2-ethylhexyl)phtlalate (DEHP), perfluorinated compounds (PFC), linear alkyl-benzene sulfonate (LAS), nonylphenol and nonylphenol ethoxylate (NP+NPEO), and brominated flame retardants including polybrominated diphenylethers (PBDE), hexabromocyclododecane (HBCD) and tetrabromobisphenol A (TBBPA). Moreover the occurrence of 25 different pharmaceuticals in digestate was determined. The risk for the food safety caused by the fertilizer use of a biogas plant digestate was evaluated based on the literature. According to the risk assessment, agricultural use of biogas plant end products is unlikely to cause significant risk for food safety in Finland for most of the compound groups studied. They are either degraded in the soil, or they are not taken up by the plant and further migrated in the food chain, or the concentration in the soil is at a very low level when also the uptake by the plant is minor. However with PBDEs, PFCs, HBCD and pharmaceuticals, further research is needed to be able to evaluate the risk caused by the fertilizer use of the biogas plant digestates.
- FI; fi; efsafocalpoint@evira.fi