Potential of freezing in wastewater treatment: soluble pollutant applications

Lorain, Olivier; Thiebaud, Pascal; Badorc, Eugenie; Aurelle, Y.

doi:10.1016/s0043-1354(00)00287-6

Cited by 99 publications

(42 citation statements)

References 8 publications

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“…2017). The performance of freeze desalination at wide ranges of concentrations was observed in literature for other ions as well (Lorain et al 2001;Kang et al 2014). The removal of the ions employed in the experiment for simulation decreased in the order: K + > Na + > Mg 2+ ≈ Ca 2+ .…”

Section: Nm = Not Measuredmentioning

confidence: 53%

“…Afterwards, the entrapment of Cr(VI) in the ice phase increased and the removal percentage started decreasing. Such trend has been observed also for the removal of other soluble organic pollutants (Lorain et al 2001). It was shown in literature that, as the residual liquid volume got too small, the removal efficiency decreased, due to the impossibility to maintain regular contact between the liquid and solid phases (Zhang et al 2016).…”

Section: Deionized Water Spiked With Cr(vi)mentioning

confidence: 57%

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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: Nm = Not Measuredmentioning

confidence: 53%

Section: Deionized Water Spiked With Cr(vi)mentioning

confidence: 57%

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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“…Both the concentration and the microstructural location of impurities can have significant impacts on recrystallisation, grain growth, electrical conductivity and diffusion in ice (Baker et al, 2003). Few compounds can be incorporated directly into the ice crystals; hence, any impurity entrapment would be due to trapped solutions or trapped salt crystals and not direct incorporation into the crystal lattice (Olsson, 1999;Lorain et al, 2000).…”

Section: Challenges In Freeze Desalination Processesmentioning

confidence: 99%

Performance comparison of hydraulic and gravitation HybridICE filters in freeze desalination of mine waters

Adeniyi¹,

Mbaya²,

Popoola³

et al. 2015

WSA

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HybridICE is an emerging freeze desalination technology for treating complex mine wastewaters. The technology works on the principle that growing ice crystals reject impurities during freezing. The bottleneck in the freeze desalination processes may be the separation of ice from the ice slurry generated in the freeze engine. Two types of HybridICE filter have been developed to effect ice separation from ice slurry. The two types differ in the design of the filter elements, mode of feeding the slurry into the filter, and the mechanism of separation of ice from the slurry. In both types of filter, an extruded continuous ice column is formed around the filtering element, which has some openings to allow excess concentrated process water to flow out of the filter. However, the driving force in the gravitation filter is buoyancy, while in the hydraulic filter the ice column is driven by the pressure generated from the flow of the slurry. Salt removal and ice yield from each of the filter types was evaluated when a solution of approximately 4% m/m NaCl solution, prepared by dissolving 25.1 kg of NaCl in 674 litres of water, was treated in a HybridICE freeze crystallisation pilot plant. The objective was to describe the operation of the two types of filter and compare their performance. Salt removal and ice yield were found to be higher with the gravitation filter than the hydraulic filter.

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“…During ice crystal formation, solutes are rejected by the nature of ice crystal lattice which is formed by pure water. Water solidification process forming the small dimension ice crystal lattice makes the inclusion of any impurities impossible except for fluorohydric acid and ammonia, thus there is no solute contaminants in ice [6]. Progressive freeze concentration (PFC) process has been found to be one of the methods to form a single large ice crystal.…”

Section: Introductionmentioning

confidence: 99%

“…Design with a good productivity and efficiency would be a favour in the application of PFC system. In order to amend the weaknesses of previous conventional designs, several new designs for PFC system have been developed especially on solution movement such as stirring [10,11], ultrasonic radiation [12,13], bubble-flow [14,15], agitation and aeration [16] and also by oscillatory motion [6,17]. In this study, rotation of crystalliser was introduced as an agent of target solution movement, equipped with antisupercooling holes to eliminate ice seeding stage.…”

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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Potential of freezing in wastewater treatment: soluble pollutant applications

Cited by 99 publications

References 8 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

Performance comparison of hydraulic and gravitation HybridICE filters in freeze desalination of mine waters

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

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