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Ammonia Recovery from Digestate Using Gas-Permeable Membranes: A Pilot-Scale Study
| Content Provider | MDPI |
|---|---|
| Author | Berta, Riaño Mar, ía Cruz García-González Molinuevo-Salces, Beatriz Vanotti, Matías B. |
| Copyright Year | 2021 |
| Description | The reduction and recovery of nitrogen (N) from anaerobically digested manure (digestate) is desirable to mitigate N-related emissions, mainly ammonia and nitrate, derived from digestate land application in nutrient-saturated zones. This work reports the results of a gas-permeable membrane (GPM) pilot-scale plant to recover ammonia from digestate in the framework of the EU project Ammonia Trapping. The total ammonia nitrogen (TAN) concentration in digestate was reduced by 34.2% on average (range 9.4–57.4%). The recovery of TAN in the trapping solution in the form of a $(NH_{4})_{2}SO_{4}$ solution averaged 55.3% of the removed TAN, with a TAN recovery rate of 16.2 g N $m^{−2}$ $d^{−1}$ (range between 14.5 and 21.0 g N $m^{−2}$ $d^{−1}$). The TAN concentration in the trapping solution achieved a value of up to 35,000 mg N $L^{−1}$. The frequent change of the trapping solution has been proven as an efficient strategy to improve the overall performance of the GPM technology. |
| Starting Page | 133 |
| e-ISSN | 20763298 |
| DOI | 10.3390/environments8120133 |
| Journal | Environments |
| Issue Number | 12 |
| Volume Number | 8 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-25 |
| Access Restriction | Open |
| Subject Keyword | Environments Environmental Engineering Anaerobic Digestion Digestate Gas-permeable Membranes Ammonia Recovery |
| Content Type | Text |
| Resource Type | Article |
