Reduction of seawater scale forming potential using the fluidized bed crystallization technology

Omar, Waid; Chen, J.; Ulrich, Joachim

doi:10.1016/j.desal.2009.03.013

Cited by 28 publications

(11 citation statements)

References 15 publications

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“…The results indicated that this combination offered a very promising performance with high water recovery (77.2%) and water costs reduced to $0.37/m 3 . The idea of using the same technology for scaling reduction of seawater might be an effective, green, and low-cost scale control method [21][22][23]. The method is based on introducing calcium carbonate particle to supersaturated seawater within the meta-stable zone.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Application of pellet softening (PS) as a scale prevention method in seawater desalination plants

Al‐Ghamdi

Omar

2013

Desalination and Water Treatment

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A B S T R A C TThis research investigates the potential of pellet softening (PS) on calcite particles as a control method to avoid scaling of calcium carbonate from seawater in desalination. Experimental studies were conducted in a 5 L agitated vessel under controlled temperature and agitation. The measured transient calcium ion concentration, salinity, pH, and total alkalinity of seawater during mixing with calcite particles show that the Ryznar Stability index (RSI) increased from 4.3 to 5.7, which means that the status of seawater changed from "high scaling potential "to "low scaling potential" after being subjected to PS process at 70˚C. The supersaturation of seawater with respect to calcite is reduced from 33.5 to 5.27. The results demonstrate that PS is a feasible and effective pretreatment strategy for thermal and membrane seawater desalination facilities.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

Application of pellet softening (PS) as a scale prevention method in seawater desalination plants

Al‐Ghamdi

Omar

2013

Desalination and Water Treatment

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“…LSI and RI are two commonly used saturation indices to assess CaCO 3 precipitation potential (Qasim et al, 2000;Al-Rawajfeh et al 2005;Luo et al 2009;Omar et al 2010;Nia et al 2010;De Moel et al 2013). LSI measures the effect of pH on the equilibrium solubility of CaCO 3 .…”

Section: Saturation Indicesmentioning

confidence: 99%

Characterization of Biofilms and Mineralogical Scale in Underground Injection Well Disposal of Landfill Leachate and Industrial Wastewater Streams

Meeroff¹,

Shaha²,

Bloetscher³

et al. 2019

GEP

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Deep-well injection is a cost-effective alternative for industrial wastewater disposal, given the appropriate geology. Fouling of injection well tubing by biofilm or scale is common and reduces the effective diameter of the pipe, which results in increased wellhead pressure and lower injectivity. A detailed microbiological composition of biofilms and abiotic fingerprints use of mineral scale from an injection well has not been reported before. Therefore, biofilm and mineral scale samples from three depth intervals within a deep injection well (surface zone, D1= 0-61 m; intermediate zone, D2 = 62-457 m; and above the injection zone, D3 = 458-884 m) with recurrent biofilm development were collected to characterize the mineral composition and microbial community DNA. X-ray diffraction (XRD) analysis of the solids confirms the composition of the solids collected was mostly calcium carbonate (CaCO 3) with minor contributions from common mineral salts. Microbiological fingerprinting suggests that methanogenic archaea and sulfatereducing bacteria both of which are anaerobic biofilm producers were the most prevalent members of the prokaryotic community at all sampled depths. Methanosarcinae spp. increased with increasing depths, unlike other archaea. A non-pathogenic biofilm-producing Entamoeba dispar was the most prevalent member of the microbial domain (>30%) in all samples but was highest at the middle depth. The Chao alpha diversity indices for bacteria, viruses,

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“…A heterogeneous crystallization on the surface of seeding salt crystals is proposed as a method of scaling elimination in the installations for water desalination [17,18]. The effectiveness of such solution was also tested in this work by location of the MD2 module directly inside a fluidized-bed crystallizer.…”

Section: Fluidized-bed Crystallizermentioning

confidence: 99%

“…The salt removal by fluidized-bed method was also applied in water desalination processes. The salt removal by seeding in a fluidized-bed crystallizer was found to be a feasible method for the reduction of scaling tendency of seawater [17]. This method is based on introducing seed (salt crystals) of the same type as the scaling materials to the metastable salt solution in order to reduce its supersaturation by heterogeneous crystallization.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Polypropylene Membranes Applied in Membrane Distillation Crystallizer

Gryta

2016

Crystals

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Abstract:The studies on the resistance to degradation of capillary polypropylene membranes assembled in a membrane crystallizer were performed. The supersaturation state of salt was achieved by evaporation of water from the NaCl saturated solutions using membrane distillation process. A high feed temperature (363 K) was used in order to enhance the degradation effects and to shorten the test times. Salt crystallization was carried out by the application of batch or fluidized bed crystallizer. A significant membrane scaling was observed regardless of the method of realized crystallization. The SEM-EDS, DSC, and FTIR methods were used for investigations of polypropylene degradation. The salt crystallization onto the membrane surface accelerated polypropylene degradation. Due to a polymer degradation, the presence of carbonyl groups on the membranes' surface was identified. Besides the changes in the chemical structure a significant mechanical damage of the membranes, mainly caused by the internal scaling, was also found. As a result, the membranes were severely damaged after 150 h of process operation. A high level of salt rejection was maintained despite damage to the external membrane surface.

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Reduction of seawater scale forming potential using the fluidized bed crystallization technology

Cited by 28 publications

References 15 publications

Application of pellet softening (PS) as a scale prevention method in seawater desalination plants

Application of pellet softening (PS) as a scale prevention method in seawater desalination plants

Characterization of Biofilms and Mineralogical Scale in Underground Injection Well Disposal of Landfill Leachate and Industrial Wastewater Streams

Degradation of Polypropylene Membranes Applied in Membrane Distillation Crystallizer

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