Microwave Irradiation as a Way to Reutilize the Recovered Struvite Slurry and to Enhance System Performance

Cho, Joon Hee; Lee, Jin Eui; Ra, Chang‐Six

doi:10.5187/jast.2009.51.4.337

Cited by 11 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The theoretical optimal value of 1:1:1 cannot be achieved because the NH 4 + :PO 4 3− ratio of wastewater cannot be 1:1, and, thus, when the PO 4 3 -P concentration is lower, the values of the variables in the reaction can vary. Generally, the ammonia removal rate is within ~20% to 40% ( Cho et al, 2009 ; Ye et al, 2011 ), and the phosphorus removal rate is relatively high, ranging from 67% to a maximum of 99% ( Kim et al, 2004 ; Liu et al, 2011a ).…”

Section: Resultsmentioning

confidence: 99%

Struvite Crystallization of Anaerobic Digestive Fluid of Swine Manure Containing Highly Concentrated Nitrogen

Lee

Yang

et al. 2015

Asian Australas. J. Anim. Sci

View full text Add to dashboard Cite

In this study, the optimal operation factors for struvite crystallization for removing and recovering nitrogen and phosphorus from anaerobic digestive fluid of swine manure containing highly concentrated nitrogen was determined. Every experiment for the struvite crystallization reaction was conducted by placing 1,000 mL of digestion fluid in a 2,000 mL Erlenmeyer flask at various temperatures, pH, and mixing speed. Except for special circumstances, the digestion fluid was centrifuged (10,000 rpm, 10 min) and then the supernatant was used for the experiment at room temperature and 100 rpm. The optimal mole ratio of PO43−:Mg2+ was 1:1.5, and the pH effect ranging from 9 to 11 was similar, when mixed for 1 hour. Under this condition, the removal efficiency of NH4+-N and PO43−-P was 40% and 88.6%, respectively. X-shaped crystal was observed by light and scanning electron microscopy. In addition, struvite crystal structure was confirmed through X-ray diffraction analysis.

show abstract

Section: Resultsmentioning

confidence: 99%

Struvite Crystallization of Anaerobic Digestive Fluid of Swine Manure Containing Highly Concentrated Nitrogen

Lee

Yang

et al. 2015

Asian Australas. J. Anim. Sci

View full text Add to dashboard Cite

show abstract

“…Struvite precipitation requires equi-molar concentrations (1:1:1) of Mg 2+ , NH 4 + and PO 4 3with an alkaline pH [14]. However, intentional struvite precipitation through biological [15], chemical [4,16,17], and electrochemical techniques [8,[18][19][20] can yield a material that generally contains 11 to 26% total P [21] and has been described as an effective, alternative fertilizer-P source [22]. Struvite has also been characterized with only 4 to 6% water solubility in soil [23,24], while the remaining P is acid-soluble [25].…”

Section: Soil Collection Processing and Analysesmentioning

confidence: 99%

Flood-Irrigated Rice Response to Fertilizer-Phosphorus Sources in a Phosphorus-Deficient Silt-Loam Soil

Niyi S,

Kristofor R,

Diego Della

et al. 2023

J Rice Res Dev

View full text Add to dashboard Cite

Phosphorus (P) is an essential plant macronutrient that is commonly applied as a fertilizer for optimal crop production. As the global supply of fertilizer-P sources, mainly derived from mined rock phosphate (RP), is decreasing, alternative nutrient sources need to be developed and tested, such a wastewater-recovered struvite-P materials. The objective of this greenhouse study was to evaluate below-and aboveground rice (Oryza sativa) response to various fertilizer-P sources [i.e., mono-and diammonium phosphate (MAP and DAP, respectively), triple superphosphate (TSP), RP, electrochemically and chemically precipitated struvite (ECST and CPST, respectively), and an unamended control (UC)] under flood-irrigation in a P-deficient, silt-loam soil. Of the 17 belowground properties evaluated, eight differed (P < 0.05) among fertilizer-P sources, while three were at least numerically largest from CPST. Of the 17 aboveground properties evaluated, six differed (P < 0.05) among fertilizer-P sources and all six were at least numerically largest from MAP or DAP. For all 22 rice properties that differed (P < 0.05) among fertilizer-P-sources, either ECST, CPST, or both had a similar response to TSP, DAP, and/or MAP, while belowground P and calcium (Ca) and grain potassium (K) concentrations from CPST were greater (P < 0.05) than from TSP, DAP, or MAP. Results demonstrated that struvite-P sources (i.e., ECST and CPST) are a viable, alternative fertilizer-P source, as evidenced by the large frequency of similar rice responses to other commercially available fertilizer-P sources commonly used for flood-irrigated rice production on a silt-loam soil in Arkansas (i.e., TSP, DAP, or MAP).

show abstract

“…Rahman et al. (2011) and Cho, Lee, and Ra (2009) have reported that it is possible to remove 93% of P and 40% of N from wastewater through struvite crystallization. In addition to supplying N and magnesium (Mg), struvite is also considered as a P fertilizer source and alternative to natural PR (Münch & Barr, 2001; Shu, Schneider, Jegatheesan, & Johnson, 2006).…”

Section: Introductionmentioning

confidence: 99%

Potato response to struvite compared with conventional phosphorus fertilizer in Eastern Canada

et al. 2020

View full text Add to dashboard Cite

In acidic soils with high phosphorus (P) fixing capacity, P application at levels higher than crop requirements is common in crops with high P demands such as potato (Solanum tuberosum L.), which could lead to eutrophication. Recycled sources of P fertilizer, such as struvite, can be efficient in meeting crop P demands while minimizing P losses. The objective of this study-conducted in four provinces over 3 yr (2016-2018, with 12 sites in total) in Eastern Canada-was to assess potato response to P fertilizer as triple superphosphate (TSP) or a mixture of TSP with struvite. Eight P treatments were applied with five increasing P rates as TSP (0, 26, 52, 79, and 105 kg P ha −1 ) and three treatments as a mixture of TSP and struvite (25, 50, and 75% (w/w) struvite) at a rate of 79 kg P ha −1 . Phosphorus availability indices measured multiple times over the growing season were composed of Mehlich-3 extracted P (P M3 ), soil P adsorbed on anion exchange membranes (P AEMs ), and petiole P-PO 4 (P petiole ) concentrations. There was a potato yield response to P inputs at all sites, with the control treatment showing lower potato yield at all sites. Potato yield, P petiole , P M3 , and P AEMs were comparable between 100% TSP and TSP+struvite at the same rate, except at one site where struvite at a higher proportion depressed yield and was associated with lower P uptake. Overall, the use of struvite could be a sustainable mean to address long-term globally P scarcity.

show abstract

Microwave Irradiation as a Way to Reutilize the Recovered Struvite Slurry and to Enhance System Performance

Cited by 11 publications

References 21 publications

Struvite Crystallization of Anaerobic Digestive Fluid of Swine Manure Containing Highly Concentrated Nitrogen

Struvite Crystallization of Anaerobic Digestive Fluid of Swine Manure Containing Highly Concentrated Nitrogen

Flood-Irrigated Rice Response to Fertilizer-Phosphorus Sources in a Phosphorus-Deficient Silt-Loam Soil

Potato response to struvite compared with conventional phosphorus fertilizer in Eastern Canada

Contact Info

Product

Resources

About