Ultrasonic power combined with seed materials for recovery of phosphorus from swine wastewater via struvite crystallization process

Precipitation of ammonium together with phosphate and magnesium is a possible alternative for lowering the nitrogen content of wastewater. In this study we examine the removal of ammonium nitrogen and phosphorus from slurry-type swine wastewater containing high concentrations of nutrients by the addition of phosphoric acid along with either calcium oxide or magnesium oxide, which leads to the crystallization of insoluble salts such as hydroxyapatite and struvite. The struvite crystallization method showed a high capacity for the removal of nitrogen when magnesium oxide and phosphoric acid were used as the magnesium and phosphate sources, respectively. When it was applied to swine wastewater containing a high concentration of nitrogen, the injection molar ratio of Mg2+:NH4+:PO43- that gave maximum ammonium nitrogen removal was 3.0:1.0:1.5.

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Effects of pH, molar ratios and pre-treatment on phosphorus recovery through struvite crystallization from effluent of anaerobically digested swine wastewater

Environmental Engineering Research ◽

10.4491/eer.2016.037 ◽

2016 ◽

Vol 22 (1) ◽

pp. 12-18 ◽

Cited By ~ 23

Author(s):

Daegi Kim ◽

Kyung Jin Min ◽

Kwanyong Lee ◽

Min Sung Yu ◽

Ki Young Park

Keyword(s):

Phosphorus Recovery ◽

Swine Wastewater ◽

Molar Ratios ◽

Effects Of Ph ◽

Struvite Crystallization ◽

Pre Treatment

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Possibility of Recovering of Phosphorus Using Struvite Crystallization from Swine Wastewater

Nihon Yoton Gakkaishi ◽

10.5938/youton.48.1 ◽

2011 ◽

Vol 48 (1) ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Eisuke KAWAMURA ◽

Makoto TANABE ◽

Kazuyoshi SUZUKI

Keyword(s):

Swine Wastewater ◽

Struvite Crystallization

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Removal and Recovery of Phosphorus Using Struvite Crystallization from Thickener Effluent of Swine Wastewater Treated with Coagulant and Machine Separation

Nihon Yoton Gakkaishi ◽

10.5938/youton.47.187 ◽

2010 ◽

Vol 47 (4) ◽

pp. 187-197

Author(s):

Yuichiro WAKIYA ◽

Minoru ISHIDA ◽

Toshihiro UCHIDA ◽

Sachiko FURUTA ◽

Masanobu SEKIDO ◽

...

Keyword(s):

Swine Wastewater ◽

Struvite Crystallization ◽

Removal And Recovery

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Evaluation of the hydration process of an industrial magnesia compound to obtain struvite crystals: a technique for recovering nutrients

Rem Revista Escola de Minas ◽

10.1590/0370-44672015680138 ◽

2015 ◽

Vol 68 (1) ◽

pp. 77-84 ◽

Cited By ~ 1

Author(s):

Samuel Rodrigues Castro ◽

Mahira Adna Cota Araújo ◽

Liséte Celina Lange

Keyword(s):

Magnesium Hydroxide ◽

Crystallization Process ◽

Attractive Alternative ◽

Hydration Reaction ◽

Acetate Solution ◽

Experimental Conditions ◽

Chemical Reagents ◽

Sodium Chloride Solutions ◽

Struvite Crystallization ◽

The Cost

Struvite crystallization as a technique for recovering nutrients from wastewater streams has proven to be an attractive alternative to conventional treatments. The process becomes economically viable with the cost reductions related to the chemical reagents, especially magnesium ions. Thus, this study assessed the processing of a cheap and high-grade industrial magnesia compound in obtaining magnesium hydroxide slurries through a hydration reaction using different hydrating agents (magnesium acetate and sodium chloride solutions and water). The optimum hydration condition was achieved in acetate solution with a conversion rate to hydroxide about 67%. The efficiency of the obtained slurries as alternative reagents on the struvite crystallization process was evaluated in terms of the nutrient removal, NH4+-N and PO43--P. In experimental conditions of Mg2+:NH4+:PO43-ratio equal to 1.5:1.0:1.25 and pH equal to 8.5, the best results were achieved by using the magnesium hydroxide slurry obtained in acetate solution, which promoted removals of about 62% and 67% of NH4+-N and PO43--P, respectively. Finally, instrumental analysis confirmed the formation of struvite crystals in a purity degree that allows its use as a potential fertilizer.

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Nutrient Recovery by Struvite Crystallization Process: Virginia Experience

Proceedings of the Water Environment Federation ◽

10.2175/193864707786831408 ◽

2007 ◽

Vol 2007 (19) ◽

pp. 344-358 ◽

Cited By ~ 3

Author(s):

Ram Prasad ◽

Ahren Britton ◽

Bill Balzer ◽

Gary Schafran

Keyword(s):

Crystallization Process ◽

Nutrient Recovery ◽

Struvite Crystallization

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Effect of Curcumin AgainstProteus mirabilisDuring Crystallization of Struvite from Artificial Urine

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2012/862794 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 23

Author(s):

Jolanta Prywer ◽

Agnieszka Torzewska

Keyword(s):

Urinary Tract Infection ◽

Proteus Mirabilis ◽

Crystallization Process ◽

Crystal Morphology ◽

Stone Formation ◽

Urinary Stone ◽

Urinary Stones ◽

Artificial Urine ◽

Struvite Crystallization

We investigated the activity of curcumin againstProteus mirabilisand the struvite crystallization in relation to urinary stones formation. In order to evaluate an activity of curcumin we performed anin vitroexperiment of struvite growth from artificial urine. The crystallization process was induced byProteus mirabilisto mimic the real urinary tract infection, which usually leads to urinary stone formation. The results demonstrate that curcumin exhibits the effect againstProteus mirabilisinhibiting the activity of urease—an enzyme produced by these microorganisms. Addition of curcumin increases the induction time and decreases the efficiency of growth of struvite compared with the absence of curcumin. Interestingly, the addition of curcumin does not affect the crystal morphology and habit. In conclusion, curcumin has demonstrated its significant potential to be further investigated for its use in the case of struvite crystallization induced for the growth byProteus mirabilisin relation to urinary stone formation.

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