Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management
ABSTRACT Introduction Anaerobic digestion (AD) is essential for manure management, generating biogas and nutrient‐rich digestate for organic fertilizer. However, improper digestate use can pose environmental risks. Recovering struvite, a magnesium ammonium phosphate (MAP) compound, from digestate pr...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-10-01
|
| Series: | Journal of Sustainable Agriculture and Environment |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/sae2.70018 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850035403597283328 |
|---|---|
| author | Anita Nagarajan Bernard Goyette Vijaya Raghavan Dominic Poulin‐Laprade Rajinikanth Rajagopal |
| author_facet | Anita Nagarajan Bernard Goyette Vijaya Raghavan Dominic Poulin‐Laprade Rajinikanth Rajagopal |
| author_sort | Anita Nagarajan |
| collection | DOAJ |
| description | ABSTRACT Introduction Anaerobic digestion (AD) is essential for manure management, generating biogas and nutrient‐rich digestate for organic fertilizer. However, improper digestate use can pose environmental risks. Recovering struvite, a magnesium ammonium phosphate (MAP) compound, from digestate provides a sustainable, controlled‐release fertilizer, supporting a circular economy in agriculture. Materials and Methods The study employed a two‐stage (liquid–solid) AD process using poultry, dairy, and swine manures, along with wasted corn silage. Digestates were sampled for physicochemical and biogas quality analyses, with feedstocks categorized into D1 and D2, and a composite (D3) formed for struvite characterization. Microbial populations were enumerated on selective media, and struvite mineral content was analysed via argon plasma emission spectrometry. Results The digesters processing feedstock mixtures D1 and D2 achieved specific methane yields of 1.26 L/g CODs fed and 1.49 L/g CODs fed, with cumulative biogas production of 374 and 369 L, respectively, over four 77‐day cycles. The two‐stage AD process significantly reduced antibiotic‐resistant, Enterobacteriaceae and Enterococcus spp. Total ammoniacal nitrogen (TAN) recovery rates were high at 98%–99%, with a consistent struvite crystal mass of 0.67 g/10 mL, indicating the efficiency of this integrated process. The agronomic value of struvite was determined, indicating its potential utility as a fertilizer, and scanning electron microscopy analysis revealed diverse crystal structures, warranting further investigation into their implications for usage and storage. Conclusion The results suggests that the two‐stage AD process efficiently transforms organic waste into high‐quality biogas, reduces antibiotic‐resistant bacteria, and facilitates nutrient recovery through struvite precipitation. This approach supports co‐digestion of multi‐substrates and promotes circular economy principles, with potassium or sodium phosphate enhancing struvite recovery for sustainable agriculture. |
| format | Article |
| id | doaj-art-9cf041a54abc403db9087979c49f251b |
| institution | DOAJ |
| issn | 2767-035X |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Sustainable Agriculture and Environment |
| spelling | doaj-art-9cf041a54abc403db9087979c49f251b2025-08-20T02:57:29ZengWileyJournal of Sustainable Agriculture and Environment2767-035X2024-10-0134n/an/a10.1002/sae2.70018Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure ManagementAnita Nagarajan0Bernard Goyette1Vijaya Raghavan2Dominic Poulin‐Laprade3Rajinikanth Rajagopal4Sherbrooke Research and Development Center Agriculture and Agri‐Food Canada Sherbrooke Quebec CanadaSherbrooke Research and Development Center Agriculture and Agri‐Food Canada Sherbrooke Quebec CanadaDepartment of Bioresource Engineering McGill University Sainte‐Anne‐de‐Bellevue Quebec CanadaSherbrooke Research and Development Center Agriculture and Agri‐Food Canada Sherbrooke Quebec CanadaSherbrooke Research and Development Center Agriculture and Agri‐Food Canada Sherbrooke Quebec CanadaABSTRACT Introduction Anaerobic digestion (AD) is essential for manure management, generating biogas and nutrient‐rich digestate for organic fertilizer. However, improper digestate use can pose environmental risks. Recovering struvite, a magnesium ammonium phosphate (MAP) compound, from digestate provides a sustainable, controlled‐release fertilizer, supporting a circular economy in agriculture. Materials and Methods The study employed a two‐stage (liquid–solid) AD process using poultry, dairy, and swine manures, along with wasted corn silage. Digestates were sampled for physicochemical and biogas quality analyses, with feedstocks categorized into D1 and D2, and a composite (D3) formed for struvite characterization. Microbial populations were enumerated on selective media, and struvite mineral content was analysed via argon plasma emission spectrometry. Results The digesters processing feedstock mixtures D1 and D2 achieved specific methane yields of 1.26 L/g CODs fed and 1.49 L/g CODs fed, with cumulative biogas production of 374 and 369 L, respectively, over four 77‐day cycles. The two‐stage AD process significantly reduced antibiotic‐resistant, Enterobacteriaceae and Enterococcus spp. Total ammoniacal nitrogen (TAN) recovery rates were high at 98%–99%, with a consistent struvite crystal mass of 0.67 g/10 mL, indicating the efficiency of this integrated process. The agronomic value of struvite was determined, indicating its potential utility as a fertilizer, and scanning electron microscopy analysis revealed diverse crystal structures, warranting further investigation into their implications for usage and storage. Conclusion The results suggests that the two‐stage AD process efficiently transforms organic waste into high‐quality biogas, reduces antibiotic‐resistant bacteria, and facilitates nutrient recovery through struvite precipitation. This approach supports co‐digestion of multi‐substrates and promotes circular economy principles, with potassium or sodium phosphate enhancing struvite recovery for sustainable agriculture.https://doi.org/10.1002/sae2.70018anaerobic digestionantimicrobial resistancemanure managementpathogen inactivationstruvite recovery |
| spellingShingle | Anita Nagarajan Bernard Goyette Vijaya Raghavan Dominic Poulin‐Laprade Rajinikanth Rajagopal Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management Journal of Sustainable Agriculture and Environment anaerobic digestion antimicrobial resistance manure management pathogen inactivation struvite recovery |
| title | Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management |
| title_full | Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management |
| title_fullStr | Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management |
| title_full_unstemmed | Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management |
| title_short | Integrating Anaerobic Digestion With Struvite Production for Enhanced Nutrient Recovery, Pathogen Reduction, and Circularity in Manure Management |
| title_sort | integrating anaerobic digestion with struvite production for enhanced nutrient recovery pathogen reduction and circularity in manure management |
| topic | anaerobic digestion antimicrobial resistance manure management pathogen inactivation struvite recovery |
| url | https://doi.org/10.1002/sae2.70018 |
| work_keys_str_mv | AT anitanagarajan integratinganaerobicdigestionwithstruviteproductionforenhancednutrientrecoverypathogenreductionandcircularityinmanuremanagement AT bernardgoyette integratinganaerobicdigestionwithstruviteproductionforenhancednutrientrecoverypathogenreductionandcircularityinmanuremanagement AT vijayaraghavan integratinganaerobicdigestionwithstruviteproductionforenhancednutrientrecoverypathogenreductionandcircularityinmanuremanagement AT dominicpoulinlaprade integratinganaerobicdigestionwithstruviteproductionforenhancednutrientrecoverypathogenreductionandcircularityinmanuremanagement AT rajinikanthrajagopal integratinganaerobicdigestionwithstruviteproductionforenhancednutrientrecoverypathogenreductionandcircularityinmanuremanagement |