Recovery of phosphorus and nitrogen from alkaline hydrolysis supernatant of excess sludge by magnesium ammonium phosphate

2014 ◽  
Vol 166 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Bi ◽  
Yiyong Li ◽  
Yongyou Hu
Keyword(s):  
Alkaline Hydrolysis ◽  
Ammonium Phosphate ◽  
Excess Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium

scholarly journals Phosphorus Recovery from Excess Sludge with Subcritical Water Process and Magnesium Ammonium Phosphate Process

2005 ◽  
Vol 16 (4) ◽  
pp. 309-317
Author(s):  
Mitsuhiro Arakane ◽  
Tsuyoshi Imai ◽  
Sadaaki Murakami ◽  
Masami Takeuchi ◽  
Masao Ukita ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Ammonium Phosphate ◽  
Phosphorus Recovery ◽  
Excess Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium

Resource recovery from excess sludge by subcritical water combined with magnesium ammonium phosphate process

2006 ◽  
Vol 54 (9) ◽  
pp. 81-86 ◽  
Author(s):  
M. Arakane ◽  
T. Imai ◽  
S. Murakami ◽  
M. Takeuchi ◽  
M. Ukita ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Subcritical Water ◽  
New Technology ◽  
Ammonium Phosphate ◽  
Municipal Wastewater Treatment ◽  
Excess Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
Municipal Wastewater Treatment Plants

The amount of excess sludge produced in municipal wastewater treatment plants in Japan is increasing every year as the urban population increases. Phosphorus in excess sludge could be a potential phosphorus resource since at present, phosphate rock is being exhausted all over the world. Every year, Japan imports large quantities of phosphorus from abroad but much is discharged as excess sludge. Therefore, the solubilization process, one method of recovering phosphorus from sludge, could be a promising solution. In this study, a subcritical water process, a new technology that solubilizes sludge under subcritical conditions, was applied before the phosphorus in sludge was recovered with the magnesium ammonium phosphate (MAP) process. As a result, the solubilization rate of excess sludge achieved approximately 80% and about 94–97% of the phosphorus could be recovered.

scholarly journals Resource Recovery from Excess Sludge by Subcritical Water Process with Magnesium Ammonium Phosphate Process

2005 ◽  
Vol 3 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Mitsuhiro Arakane ◽  
Tsuyoshi Imai ◽  
Sadaaki Murakami ◽  
Masami Takeuchi ◽  
Masao Ukita ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Ammonium Phosphate ◽  
Resource Recovery ◽  
Excess Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium

scholarly journals A Giant Ureteral Stone without Underlying Anatomic or Metabolic Abnormalities: A Case Report

2013 ◽  
Vol 2013 ◽  
pp. 1-3 ◽  
Author(s):  
Selcuk Sarikaya ◽  
Berkan Resorlu ◽  
Ekrem Ozyuvali ◽  
Omer Faruk Bozkurt ◽  
Ural Oguz ◽  
...  
Keyword(s):  
Ureteral Stone ◽  
Ammonium Phosphate ◽  
Intravenous Urography ◽  
Metabolic Abnormalities ◽  
Magnesium Ammonium Phosphate ◽  
Distal Ureter ◽  
Double J Stent ◽  
Magnesium Ammonium ◽  
Left Flank Pain ◽  
Plain Abdominal Film

A 28-year old man presented with left flank pain and dysuria. Plain abdominal film and computed tomography showed a left giant ureteral stone measuring 11.5 cm causing ureteral obstruction and other stones 2.5 cm in size in the lower pole of ipsilateral kidney and 7 mm in size in distal part of right ureter. A left ureterolithotomy was performed and then a double J stent was inserted into the ureter. The patient was discharged from the hospital 4 days postoperatively with no complications. Stone analysis was consistent with magnesium ammonium phosphate and calcium oxalate. Underlying anatomic or metabolic abnormalities were not detected. One month after surgery, right ureteral stone passed spontaneously, left renal stone moved to distal ureter, and it was removed by ureterolithotomy. Control intravenous urography and cystography demonstrated unobstructed bilateral ureter and the absence of vesicoureteral reflux.

In vitro production of struvite by Bacillus pumilus

1991 ◽  
Vol 37 (12) ◽  
pp. 978-983 ◽  
Author(s):  
Berlin Nelson ◽  
James Struble ◽  
Gregory McCarthy
Keyword(s):  
Bacillus Pumilus ◽  
Potassium Phosphate ◽  
Ammonium Phosphate ◽  
Maximum Size ◽  
In Vitro Production ◽  
Magnesium Ammonium Phosphate ◽  
X Ray ◽  
Magnesium Ammonium ◽  
Vitro Production

A strain of Bacillus pumilus, isolated from the soilborne sclerotia of a fungus, produced crystals of the mineral struvite (magnesium ammonium phosphate hexahydrate) on Difco nutrient agar and a yeast extract agar containing magnesium sulphate and potassium phosphate. Crystals were macroscopically observed after 6–20 days of bacterial growth and reached a maximum size of 3 × 0.5 mm. Crystals were identified by X-ray powder diffractometry. These findings support the hypothesis that bacteria are involved in the biogenic formation of struvite in nature. Key words: struvite, magnesium ammonium phosphate hexahydrate, Bacillus pumilus, biomineral.

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