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2011 | 13 | 2 | 46-53
Tytuł artykułu

Reaction crystallization of struvite in a continuous DTM type crystallizer with a compressed air driven jet pump

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Experimental tests covering the production of struvite MgNH4PO4·6H2O from water solutions containing 1.0 mass % of phosphate(V) ions using magnesium and ammonium ions in stoichiometric proportions were carried out in a crystallizer of 1.2 dm3 working volume. The process temperature was 298 K. Struvite crystals of mean size Lm from ca. 14 to ca. 38 μm were produced depending on the process environment's pH (9-11) and the mean residence time of suspension in a crystallizer, τ (900-3600 s). In such defined process conditions the linear growth rate of struvite crystals changed from 1.45·10-8 m/s (pH 9, τ 900 s) to 2.06·10-9 m/s (pH 11, τ 3600 s) while the nucleation rate from 5.1·107 to 3.2·109 1/(sm3). Crystal product of the most advantageous granular characteristics was produced at pH 9 and the mean residence time 3600 s. Within this product population the largest sizes reached above 200 μm while the number of crystals smaller than 3 mm was kept below 6%.
Wydawca
Rocznik
Tom
13
Numer
2
Strony
46-53
Opis fizyczny
Daty
wydano
2011-01-01
online
2011-06-16
Twórcy
  • Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
  • Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
  • Department of Chemical & Process Engineering, Silesian University of Technology, ks. M. Strzody 7, 44-101 Gliwice, Poland
  • Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
autor
  • Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
autor
  • Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
Bibliografia
  • Mullin, J.W. (1993). Crystallization. Oxford: Butterworth-Heinemann.
  • Rojkowski, Z. & Synowiec, J. (1991). Crystallization and the Crystallizers. Warszawa: WNT (in Polish).
  • Synowiec, P. (2008). Industrial Crystallization from Solution. Warszawa: WNT (in Polish).
  • Matynia, A. (1997). Crystallizers with a jet pump. Inż. Ap. Chem. 36(6), 9-14 (in Polish).
  • Koralewska, J., Piotrowski, K., Wierzbowska, B. & Matynia, A. (2007). Nucleation and crystal growth rates of struvite in DTM type crystallizer with jet pump of descending suspension flow in a mixing chamber. Am. J. Agril. Biol. Sci. 2, 260-266.
  • Koralewska, J., Piotrowski, K., Wierzbowska, B. & Matynia, A. (2007). Reaction-crystallization of struvite in a continuous liquid jet pump DTM MSMPR crystallizer with upward circulation of suspension in a mixing chamber - an SDG kinetic approach. Chem. Eng. Technol. 30, 1576-1583. DOI: 10.1002/ceat.200700229.[Crossref][WoS]
  • Koralewska, J., Piotrowski, K., Wierzbowska, B. & Matynia, A. (2009). Kinetics of reaction-crystallization of struvite in the continuous Draft Tube Magma type crystallizers - influence of different internal hydrodynamics. Chinese J. Chem. Eng. 17, 330-339. DOI: 10.1016/S1004-9541(08)60212-8.[WoS][Crossref]
  • Matynia, A., Piotrowski, K., Ciesielski, T. & Liszka, R. (2009). New constructions of crystallizer with a compressed air driven jet-pump in the phosphorus recycling technology. Przem. Chem. 88, 505-508 (in Polish).
  • Randolph, A.D. & Larson, M.A. (1988). Theory of Particulate Processes: Analysis and Techniques of Continuous Crystallization. New York, USA: Academic Press.
  • Doyle, J. & Parsons, S.A. (2002). Struvite formation, control and recovery. Wat. Res. 36, 3925-3940. DOI: 10.1016/S0043-1354(02)00126-4.[Crossref]
  • Parsons, S.A. (2001). Recent scientific and technical developments: struvite precipitation. CEEP Scope Newslett. 41, 15-22.
  • Matynia, A., Koralewska, J., Piotrowski, K. & Wierzbowska, B. (2006). The influence of the process parameters on the struvite continuous crystallization kinetics., Chem. Eng. Comm. 193, 2, 160-176. DOI: 10.1080/009864490949008.[Crossref]
  • Le Corre, K.S., Valsami-Jones, E., Hobbs, P. & Parsons, S.A. (2009). Phosphorus recovery from wastewater by struvite crystallization: A review. Crit. Rev. Environ. Sci. Technol. 39, 433-477. DOI: 10.1080/10643380701640573.[Crossref]
  • Grzmil, B. & Wronkowski, J. (2004). Process for removing and recovering phosphates from wastewaters. Przem. Chem. 83, 275-280 (in Polish).
  • Gorazda, K., Wzorek, Z., Jodko, M. & Nowak, A.K. (2004). Struvite - manufacturing methods. Chemik 57, 317-320 (in Polish).
  • de-Bashan, L.E. & Bashan, Y. (2004). Recent advances in removing phosphorus from wastewater and its future use as fertilizer. Wat. Res. 38, 4222-4246. DOI: 10.1016/j.watres.2004.07.014.[Crossref]
  • Matynia, A., Piotrowski, K., Liszka, R. & Ciesielski, T. (2009). Reaction crystallization of struvite in a continuous DTM type crystallizer with jet-pump driven by compressed air. In Proceedings of 36th International Conference of Slovak Society of Chemical Engineering, Tatranské Matliare, Slovakia, CD-ROM No. 067, 067.1-067.10.
  • Matynia, A., Liszka, R., Ciesielski, T. & Piotrowski, K. (2009). Reaction crystallization of struvite from diluted water solutions in a continuous DTM-type crystallizer with jet pump driven by compressed air. Inż. Ap. Chem. 48(4), 83-84.[WoS]
  • Matynia, A., Mazieńczuk, A., Wierzbowska, B., Kozik, A. & Piotrowski, K. (2010). New crystallizers with a compressed air-driven jet pump in the process of precipitating struvite from diluted water solutions containing phosphate ions. Chemik 64, 753-758.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_v10026-011-0023-8
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