Struvite Precipitation for Sustainable Recovery of Nitrogen and Phosphorus from Anaerobic Digestion Effluents of Swine Manure
| Autor: | Hong-Duck Ryu, Sun-Jung Kim, Un-Il Baek, Kyunghyun Kim, Jae-Kwan Lee, Eu Gene Chung, Do Young Lim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
Geography Planning and Development lcsh:TJ807-830 lcsh:Renewable energy sources chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences application model chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering Economic analysis anaerobic digestion effluents biological treatment process Precipitation Effluent lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 optimal condition Renewable Energy Sustainability and the Environment swine manure Phosphorus lcsh:Environmental effects of industries and plants Pulp and paper industry Manure Nitrogen Anaerobic digestion lcsh:TD194-195 chemistry struvite precipitation Struvite Environmental science |
| Zdroj: | Sustainability, Vol 12, Iss 8574, p 8574 (2020) Sustainability Volume 12 Issue 20 |
| ISSN: | 2071-1050 |
| Popis: | In this study, we propose the application of struvite precipitation for the sustainable recovery of nitrogen (N) and phosphorus (P) from anaerobic digestion (AD) effluents derived from swine manure. The optimal conditions for four major factors that affect the recovery of N and P were derived by conducting batch experiments on AD effluents obtained from four AD facilities. The optimal conditions were a pH of 10.0, NH4-N:Mg:PO4-P molar ratio of 1:1.4:1, mixing intensity of 240 s&minus 1, and mixing duration of 2 min. Under these optimal conditions, the removal efficiencies of NH4-N and PO4-P were approximately 74% and 83%, respectively, whereas those of Cu and Zn were approximately 74% and 79%, respectively. Herein, a model for swine manure treatment that incorporates AD, struvite precipitation, and biological treatment processes is proposed. We applied this model to 85 public biological treatment facilities in South Korea and recovered 4722 and 51 tons/yr of NH4-N and PO4-P, respectively. The economic analysis of the proposed model&rsquo s performance predicts a lack of profitability due to the high cost of chemicals however, this analysis does not consider the resulting protection of the hydrological environment. Field-scale studies should be conducted in future to prove the effectiveness of the model. |
| Databáze: | OpenAIRE |
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