Removal and recovery of nutrients as struvite from anaerobic digestion residues of poultry manure

Date

2011-01-01

Author

Yılmazel Tokel, Yasemin Dilşad

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The removal and the recovery of nutrients, namely nitrogen (N) and phosphorus (P) from anaerobically digested and solid-liquid separated manure effluents via struvite precipitation were investigated. Both the liquid and the solid phases of the poultry manure digester effluent were subjected to struvite precipitation experiments. The Mg:N:P molar ratio of 1:1:1 in the liquid phase resulted in an average NH4-N removal efficiency of 86.4%, which increased to 97.4% by adjusting the Mg:N:P ratio to 1.5:1:1. The acidic phosphorus-dissolution process was applied to the solid phase of the effluent to obtain a phosphorus-enriched solution. Nutrient recovery experiments with NaOH as the buffering reagent were conducted with and without addition of external chemicals (Mg and P sources) to evaluate the influence of the Mg:N:P molar ratio, the Mg:P molar ratio and pH. All the experiments depicted complete PO4-P (99.6-100.0%) and partial NH4-N (3.3-65.6%) recoveries from the phosphorus-enriched solution.

Subject Keywords

Waste Management and Disposal, Water Science and Technology, Environmental Chemistry, General Medicine

URI

https://hdl.handle.net/11511/41953

Journal

ENVIRONMENTAL TECHNOLOGY

DOI

https://doi.org/10.1080/09593330.2010.512925

Collections

Department of Environmental Engineering, Article

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Citation Formats

Y. D. Yılmazel Tokel, “Removal and recovery of nutrients as struvite from anaerobic digestion residues of poultry manure,” ENVIRONMENTAL TECHNOLOGY, pp. 783–794, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41953.