Simultaneous crystallization of phosphate and potassium as magnesium potassium phosphate using bubble column reactor with draught tube

Yamaguchi, Satoshi; Ohura, Seichiro; Harada, Hiroyuki; Kotaro, Akagi; Mitoma, Yoshiharu; Kawakita, Hidetaka; Biswas, Biplob Kumar

doi:10.1016/j.jece.2013.08.032

Cited by 20 publications

(15 citation statements)

References 28 publications

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“…Since the conditions favorable precipitation of struvite-K. Based on Figure 2 shows that P removal rate was decreased from 98.5-80% which increasing of molar ratios of Mg:P from 0.8 to 1.22 since strong influence of precipitation in many scientist [22]. While for hydraulic retention time we maintained at 1.98 h; since in around of this was much more consistent than the rate reported in the literature and no effect with difference of HRT in precipitation [3,4]. Furthermore, P recovery of struvite-K we conducted only for Mg:P of 0,8 since these concentrations was effective for % P removal than others with precipitate of Mg:P of 0,7 and K:P of 1 are shown in Table 2.…”

Section: Effect Different Initial Of Mg:p Ratios On % P Removal and Precipitatesupporting

confidence: 74%

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Simultaneously Recovery of Phosphorus and Potassium Using Bubble Column Reactor as Struvite-K and Implementation on Crop Growth

Hidayat¹,

Harada²

2022

Crystallization and Applications

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Struvite-K, similar to NH4-struvite with a composition of Mg:K:P (1:1:1). It is called struvite-K because the K replaces the NH4 in struvite. The composition usually used as fertilizer and can be recycling from wastewater including livestock wastewaters. In addition, Struvite-K which tends to form scale on surfaces of equipment which problem in many industries. The present study was used bubble column reactor which simple and efficient. In addition, the process can be implementation in wastewater industry which low-tech processes. Then, the struvite-K precipitate was implementation on crop growth which compared with coffee husk compost. The results show the removal of P via struvite-K showed 98.5% with the precipitation Mg:P of 0.7 and K:P of 1 with yields of 11.28 gram. Increases of magnesium dosage which decreases of P removal rate and affected of crystal size structure. Compost and struvite-K have similar positive impact on crop growth of (radish and komatsuna) were compared than control. In the other hand, the struvite-K is more effective than compost. This might be indicated that struvite-K is more slow-release nutrient than compost and higher macro nutrient supplied on soil which crop needed.

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Section: Effect Different Initial Of Mg:p Ratios On % P Removal and Precipitatesupporting

confidence: 74%

“…Struvite-K has been synthesized to show its viability for phosphorus and potassium removal from wastewater [1][2][3][4] and naturally occurring. Tanaka [5] reported that phosphorus and potassium from effluents of livestock wastewater contains (5.5 mM) and (63.9 mM), respectively.…”

Section: Introduction 11 Bubble Column Reactor For Struvite-k Precipitationmentioning

confidence: 99%

Simultaneously Recovery of Phosphorus and Potassium Using Bubble Column Reactor as Struvite-K and Implementation on Crop Growth

Hidayat¹,

Harada²

2022

Crystallization and Applications

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“…Nowadays, research has focused on identifying feasible and practical approaches to manage high levels of phosphate and ammonia contained in wastewater streams, especially in developing countries where wastewater could be poorly treated. A wide range of technologies, based on different techniques and mechanisms, have been developed and explored, with biological processes, adsorption, filtration, bio-sorption, phytoremediation and crystallisation being popular for phosphate and ammonia removal from wastewater (Li et al, 2017;Peng et al, 2018;Satoshi et al, 2013). Adsorption has been used to remove phosphate and ammonia from wastewater, typically at bench and semi-industrial scale using clay minerals, metals and their composites, while filtration techniques have been explored as well (Goh et al, 2008;Huang et al, 2017;Satoshi et al, 2013;Yagi and Fukushi, 2012;Zulfiqar et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…A wide range of technologies, based on different techniques and mechanisms, have been developed and explored, with biological processes, adsorption, filtration, bio-sorption, phytoremediation and crystallisation being popular for phosphate and ammonia removal from wastewater (Li et al, 2017;Peng et al, 2018;Satoshi et al, 2013). Adsorption has been used to remove phosphate and ammonia from wastewater, typically at bench and semi-industrial scale using clay minerals, metals and their composites, while filtration techniques have been explored as well (Goh et al, 2008;Huang et al, 2017;Satoshi et al, 2013;Yagi and Fukushi, 2012;Zulfiqar et al, 2014). Adsorption followed by crystals settling is particularly popular (Li et al, 2015;Li et al, 2017), with Ca 2+ or Mg 2+ based materials being typically used as precursors Peng et al, 2018;Stolzenburg et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Wastewater treatment valorisation by simultaneously removing and recovering phosphate and ammonia from municipal effluents using a mechano-thermo activated magnesite technology

Mavhungu

Mbaya

Masindi

et al. 2019

Journal of Environmental Management

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Phosphate and nitrate enrichment largely impair aquatic ecosystem functions and services, thus comprising an emerging problem of environmental concern. The problem pertains to developing countries where phosphate and nitrate discharge to surface water is on the rise due to a rapid growth in population. Herein, these pollutants (phosphate and ammonia) were removed from real municipal wastewater using a simple, fast, and cost-effective process. Raw cryptocrystalline magnesite, a mineral abundant in South Africa, was simply milled and calcined (mechano-thermo processing) in order to produce the activated magnesite (feed). The feed was then used in batch processing for pollutants adsorption and precipitation from real wastewater. The process was optimised by varying the treatment or contact time, feed dosage, concentration, pH, and temperature. The feed and product mineral (produced sludge) were characterised using X-ray Diffraction (XRD), field emission scanning electron microscopy (FESEM) compatible with energy dispersive spectroscopy (EDS), and Fourier Transform Infrared Spectrometer (FTIR). It was identified that the optimal conditions differed for each pollutant, highlighting the importance of tailoring the process to fit the local wastewater characteristics and as part of a treatment train system. Specifically, maximum P removal was achieved after 5 min of mixing, using 1 g L-1 of feed, 123 mg L-1 initial phosphate concentration, pH 8-10, and was not affected by temperature variations; whereas, for ammonia removal, optimal conditions were 180 min, 16 g L-1 feed dosage, 80 mg L-1 initial concentration, pH 10 and temperature > 45 °C. The optimal conditions for the removal of both pollutants from real wastewater were 30 min, 8 g L-1 dosage, 7.5 pH, 35 o C. Furthermore, Mg and Ca concentration was found to influence the process. Reduction in total dissolved solids and electrical conductivity suggest an attenuation of chemical species. Characterisation revealed that the product mineral obtained under the optimal conditions for pollutants removal is rich in quartz, periclase, brucite, calcite, magnesite, and struvite. This was further supported by the FTIR results, which indicated the presence of Mg-O, PO 4 3− , N-H and-OH stretches. In addition, the EDS verified the presence of Mg, Ca and P in product mineral. Results are suggestive of the high efficiency of the mechano-thermo activated magnesite treatment process for P and N removal and struvite crystallization. Thus, this technology could valorise municipal wastewater effluents and open new horizons for the

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“…Figure 14 shows the effects of phosphorus concentration on removal and recovery. We had previously confirmed that the optimum pH for MPP production is pH 10-11 [12,13]. The initial phosphorus concentrations were from 0.65 to 4.6 mM from MAP treatment; the NH 4 concentrations were set at 25.6 and 4.4 mM, respectively.…”

Section: A Study Of Required Conditions Of Magnesium Potassium Phosphmentioning

confidence: 89%

Phosphorus Recovery by Crystallization

Harada¹,

Inoue²

2019

Phosphorus - Recovery and Recycling

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A bubble column, a fluidized bed, and a continuous stirred tank reactor were evaluated as equipment for recovering phosphorus from various wastewaters. Magnesium was added to the solution which contained ammonia and potassium with phosphorus at high concentrations such as livestock wastewater, dehydrated water from a sewage plant, and synthetic livestock wastewater. Magnesium ammonium phosphate or magnesium potassium phosphate could be recovered by adjusting the pH of the solution. Alternatively, calcium was added and then the pH was adjusted to obtain hydroxyapatite solid conditions without seed crystals.

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Simultaneous crystallization of phosphate and potassium as magnesium potassium phosphate using bubble column reactor with draught tube

Cited by 20 publications

References 28 publications

Simultaneously Recovery of Phosphorus and Potassium Using Bubble Column Reactor as Struvite-K and Implementation on Crop Growth

Simultaneously Recovery of Phosphorus and Potassium Using Bubble Column Reactor as Struvite-K and Implementation on Crop Growth

Wastewater treatment valorisation by simultaneously removing and recovering phosphate and ammonia from municipal effluents using a mechano-thermo activated magnesite technology

Phosphorus Recovery by Crystallization

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