PMID- 20089291
OWN - NLM
STAT- MEDLINE
DCOM- 20100810
LR  - 20220316
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 44
IP  - 7
DP  - 2010 Apr
TI  - Phosphorus recovery by struvite crystallization in WWTPs: influence of the sludge 
      treatment line operation.
PG  - 2371-9
LID - 10.1016/j.watres.2009.12.043 [doi]
AB  - Phosphorus recovery by struvite (MgNH(4)PO(4).6H(2)O) crystallization is one of 
      the most widely recommended technologies for treating sludge digester liquors 
      especially in wastewater treatments plants (WWTP) with enhanced biological 
      phosphorus removal (EBPR). In this paper, phosphorus recovery by struvite 
      crystallization is assessed using the rejected liquors resulting from four 
      different operational strategies of the sludge treatment line. Phosphorus 
      precipitation and recovery efficiencies of between 80-90% and 70-85%, 
      respectively, were achieved in the four experiments. The precipitates formed were 
      mainly struvite, followed by amorphous calcium phosphate and, in some 
      experiments, by calcite. The highest global phosphorus recovery taking into 
      account both the sludge line and the crystallizer was achieved when mixed 
      thickening and high elutriation were carried out (8.4 gP/kg treated sludge). 
      However, low struvite content was obtained in the crystallizer with this 
      operation scheme due to the high calcium content in the elutriation stream. 
      Therefore, if the final purpose is to obtain struvite, the reduction of the 
      elutriation flowrate is widely recommended in the case of high water hardness.
CI  - Copyright (c) 2009 Elsevier Ltd. All rights reserved.
FAU - Marti, N
AU  - Marti N
AD  - Dpto. Ingenieria Quimica, Universidad de Valencia, Doctor Moliner 50, 46100 
      Burjassot, Valencia, Spain.
FAU - Pastor, L
AU  - Pastor L
FAU - Bouzas, A
AU  - Bouzas A
FAU - Ferrer, J
AU  - Ferrer J
FAU - Seco, A
AU  - Seco A
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20100107
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Calcium Phosphates)
RN  - 0 (Magnesium Compounds)
RN  - 0 (Phosphates)
RN  - 0 (Sewage)
RN  - 0 (amorphous calcium phosphate)
RN  - 27YLU75U4W (Phosphorus)
RN  - AW3EJL1462 (Struvite)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - Algorithms
MH  - Calcium Carbonate/chemistry
MH  - Calcium Phosphates/chemistry
MH  - Chemical Precipitation
MH  - Crystallization
MH  - Magnesium Compounds/*chemistry
MH  - Phosphates/*chemistry
MH  - Phosphorus/*chemistry
MH  - Reproducibility of Results
MH  - Sewage/*chemistry
MH  - Struvite
MH  - Waste Disposal, Fluid/*methods
MH  - Water Purification/methods
MH  - X-Ray Diffraction
EDAT- 2010/01/22 06:00
MHDA- 2010/08/11 06:00
CRDT- 2010/01/22 06:00
PHST- 2009/07/23 00:00 [received]
PHST- 2009/12/15 00:00 [revised]
PHST- 2009/12/28 00:00 [accepted]
PHST- 2010/01/22 06:00 [entrez]
PHST- 2010/01/22 06:00 [pubmed]
PHST- 2010/08/11 06:00 [medline]
AID - S0043-1354(10)00002-3 [pii]
AID - 10.1016/j.watres.2009.12.043 [doi]
PST - ppublish
SO  - Water Res. 2010 Apr;44(7):2371-9. doi: 10.1016/j.watres.2009.12.043. Epub 2010 
      Jan 7.