Technology for freeze concentration in the desalination industry

Williams, Paul; Ahmad, Mansour; Connolly, B; Oatley-Radcliffe, Darren L.

doi:10.1016/j.desal.2014.10.023

Cited by 171 publications

(79 citation statements)

References 70 publications

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“…Thus, smooth containers are required to avoid inclusion of contaminants in ice crystals due to the roughness of surfaces involved, which may cause serious contamination during ice crystal formation. The influence of surface roughness of containers involved was previously described (Williams et al 2015). Concentrations variations were studied in the range of 1 to 300 mg/L.…”

Section: Methodsmentioning

confidence: 99%

Freeze Desalination as Point of Use Water Treatment Technology: A Case of Chromium (VI) Removal from Water

Melak

Ambelu

Laing

et al. 2017

The 2nd International Electronic Conference on Water Sciences

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Options to develop tanning industries could be hindered even in the presence of huge leather industry raw materials due to the requirements of high-tech contaminant removal technologies, especially in developing countries. This study was initiated to investigate the efficiency of freeze desalination for Cr(VI) removal using refrigerators to generate fresh water. Synthetic solutions that represent major ion compositions of drinking water as well as deionized water to which known concentrations of Cr(VI) spiked into it, were added and frozen in a closed freezer unit. The effects of different parameters such as initial concentration, freeze duration, ice nucleation, fraction of ice volume, and influence of co-occurring ions were evaluated in relation to the quality of produced ice. The physicochemical characteristics of the produced meltwater were also evaluated. A high total water recovery of up to 85% was achieved in the experimental evaluation. Cr(VI) removal efficiency of up to 80% from simulated tap and 93 to 97% for deionized water spiked with Cr(VI) were found in this batch partial freezing. Freeze desalination was found to be relatively viable desalination technology in terms of quality of water produced, options on the use of cost effective refrigerants and technologies which could have a pertinent importance to save energy consumption of freezers.

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Section: Methodsmentioning

confidence: 99%

Freeze Desalination as Point of Use Water Treatment Technology: A Case of Chromium (VI) Removal from Water

Melak

Ambelu

Laing

et al. 2017

The 2nd International Electronic Conference on Water Sciences

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“…The latent heat of fusion is 335 kJ/kg and the latent heat of vaporization is 2256.7kJ/kg, thus indicating the low energy usage by the freeze desalination process [11][12]. A wide range of construction methods and a range of materials are acceptable in freeze desalination due to is low operating temperatures in comparison to other distillation processes that permits corrosion and scale formation [12]. Regasification of liquefied natural gas (LNG) can provide the cold energy that can be used in the freeze desalination process [14].…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the nature of the ice crystal lattice only formed by pure water without any solutes, which is called the water solidification phenomena [9][10]. The latent heat of fusion is 335 kJ/kg and the latent heat of vaporization is 2256.7kJ/kg, thus indicating the low energy usage by the freeze desalination process [11][12]. A wide range of construction methods and a range of materials are acceptable in freeze desalination due to is low operating temperatures in comparison to other distillation processes that permits corrosion and scale formation [12].…”

Section: Introductionmentioning

confidence: 99%

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Indirect contact freeze water desalination for an ice maker machine – CFD simulation

2017

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Abstract. To offer for potable water shortages, sea water desalination is a potential solution for the global rising demand for fresh water. The latent heat of fusion is about one-seventh the latent heat of vaporisation, thus indicating the benefit of lower energy consumption for the freeze desalination process. Limited literature is reported on computational fluid dynamics (CFD) on freeze desalination. Therefore, analysing and investigating thermodynamic processes are easily conducted by the powerful tool of CFD. A single unit of ice formation in an ice maker machine was modelled using ANSYS Fluent software three-dimensionally. Energy, species transport and solidification/melting modules were used in building the CFD model. Parametric analysis was conducted using the established CFD model to predict the effects of freezing temperature and the geometry of the ice maker machine; on ice production and the freezing time. Lower freezing temperatures allowed more ice production and faster freezing. Increasing the diameter and the length of the freezing tube enabled more ice to be produced.

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“…The desalination process takes a huge amount of pressure or heat to separate the water from the salt and other impurities, which requires energy and therefore money [5]. The search for improved desalination method led to the use of freeze concentration method [5].…”

Section: Introductionmentioning

confidence: 99%

Desalination of Seawater via Progressive Freeze Concentration with Anti supercooling Rotating Crystallizer

Hanim¹,

Jusoh²,

Yahya³

et al. 2016

Fourth International Conference on Advances in Bio-Informatics, Bio-Technology and Environmental Engineering - ABBE 2016

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Abstract-In this work, a rotating crystallizer with antisupercooling holes was introduced as a new technology for water purification of seawater through progressive freeze concentration, where pure water is produced in the form of ice crystal block, which leaves behind a higher concentration solution. This paper presents the investigations of the effect of initial concentration and rotation time and the efficiency of the system was reviewed based on the effective partition constant (K), desalination rate (R d ) and efficiency of concentration (E%). The system has achieved its best performance at low initial concentration which is 25g/L and rotation time of four hours.

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Technology for freeze concentration in the desalination industry

Cited by 171 publications

References 70 publications

Freeze Desalination as Point of Use Water Treatment Technology: A Case of Chromium (VI) Removal from Water

Freeze Desalination as Point of Use Water Treatment Technology: A Case of Chromium (VI) Removal from Water

Indirect contact freeze water desalination for an ice maker machine – CFD simulation

Desalination of Seawater via Progressive Freeze Concentration with Anti supercooling Rotating Crystallizer

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