| Title | The Potential of Digestate and the Liquid Fraction of Digestate as Chemical Fertiliser Substitutes under the RENURE Criteria |
|---|---|
| ID_Doc | 26402 |
| Authors | Reuland, G; Sigurnjak, I; Dekker, H; Michels, E; Meers, E |
| Title | The Potential of Digestate and the Liquid Fraction of Digestate as Chemical Fertiliser Substitutes under the RENURE Criteria |
| Year | 2021 |
| Published | Agronomy-Basel, 11, 7 |
| Abstract | This study assessed how digestate and the liquid fraction (LF) of digestate would perform as candidate RENURE fertilisers (recovered nitrogen from manure) in nitrate vulnerable zones under the proposed criteria of the Joint Research Centre, namely, (i) a mineral nitrogen to total nitrogen ratio >= 90% (N-min:TN >= 90%) or a total organic carbon to TN ratio <= 3 (TOC:TN <= 3); (ii) limits of <= 300 copper (Cu) mg kg(-1) and <= 800 Zinc (Zn) mg kg(-1). These criteria were applied to unpublished data (n = 2622) on digestate compositional properties, further amended with data from the literature (n = 180); digestate analysis from seven full-scale biogas facilities (n = 14); and biogas industry stakeholders (n = 23). The results showed that Cu and Zn mostly met the criteria, with compliance rates of 94.7% (of 1035 entries) and 95.0% (of 1038 entries), respectively. Just above 5% (of 1856 entries) met the N-min/TN >= 90% criterion, while 36% (of 1583 entries) met the TOC/TN <= 3 criterion, while total compliance was 32% (of 1893 entries). When targeting the LF, total compliance increased noticeably, between 43 and 58% depending on DM range, indicating that LFs are better suited RENURE candidate fertilisers than unseparated digestate. |
| https://www.mdpi.com/2073-4395/11/7/1374/pdf?version=1626145115 |
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