Evaluation of mechanical vapor recompression crystallization process for treatment of high salinity wastewater

Dahmardeh, Hamed; Amiri, Hossein Ali Akhlaghi; Nowee, Seyed Mostafa

doi:10.1016/j.cep.2019.107682

Cited by 68 publications

(16 citation statements)

References 38 publications

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“…Thermal evaporation is often used for concentrating, [ 7 ] but thermal desalination has high investment and operating costs and is not suitable for treating large‐flow wastewater, which is the main obstacle to limiting its wide application. [ 8 ] Moreover, evaporative crystallization efficiently produces soluble mixed salt, which cannot be recycled and reused, and landfills can cause secondary pollution. This puts pressure on the environment and brings a tremendous economic burden to industrial enterprises.…”

Section: Introductionmentioning

confidence: 99%

Pilot‐Scale Study on Salt Separation of Industrial High‐Salt Wastewater Based on Nanofiltration

Liú¹,

Liu

Fu³

et al. 2022

CLEAN Soil Air Water

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To explore the effect of nanofiltration on salt separation in high‐salt wastewater, a pilot plant of nanofiltration combined with a “sand filtration–carbon filtration–ultrafiltration–ozone” pretreatment process is designed. The water used in the pilot‐scale study is the sodium salt wastewater from a battery factory in Tianjin Binhai industrial park. Under the continuous and stable operation of the pilot plant, the key consideration is to investigate the retention rate of monovalent and divalent salt ions in high‐salt wastewater by nanofiltration membranes. The results show that the combined process has a good removal effect on pollutants in wastewater. Among them, the removal rates of conventional pollutants such as turbidity, chemical oxygen demand (COD), and total dissolved solids (TDS) are 97.5, 92.35, and 87.06%, respectively. The retention rate of SO42− is as high as 99.7%, but there is a negative retention phenomenon of Cl−. The main inorganic salts Na2SO4 and NaCl in high‐salt wastewater could be effectively separated. The efficiency of the combined process to remove pollutants and different salts mainly focuses on the nanofiltration part. The pretreatment has a specific removal effect on the turbidity and macromolecular organics of wastewater, reducing the pressure for the subsequent membrane process.

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Section: Introductionmentioning

confidence: 99%

Pilot‐Scale Study on Salt Separation of Industrial High‐Salt Wastewater Based on Nanofiltration

Liú¹,

Liu

Fu³

et al. 2022

CLEAN Soil Air Water

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“…[ 16 ] Furthermore, with the increasing salinity of feedwater, the operating pressure and the energy consumption of the RO system increase significantly. [ 17 ] Meanwhile, thermal evaporative crystallization, such as mechanical vapor recompression (MVR) technology, [ 18,19 ] is a complex mechanical system that requires high‐grade heat and electricity, [ 20 ] resulting in large energy consumption and capital costs.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Evaporator with a T‐Shape Design for High‐Performance Solar‐Driven Zero‐Liquid Discharge

Jin

Duan

et al. 2021

Small

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Solar‐driven evaporation is regarded as a sustainable wastewater treatment strategy for clean water recovery and salt condensation. However, achieving both high evaporation rate and long‐term stability remain challenging due to poor thermal management and rapid salt accumulation and blocking. Here, a T‐shape solar‐driven evaporator, composed of a surface‐carbonized longitudinal wood membrane (C‐L‐wood) is demonstrated as the top “” for solar harvesting/vapor generation/salt collection and another piece of natural L‐wood as the support “” for brine transporting and thermally insulating. The horizontally aligned micro‐channels of C‐L‐wood have a low perpendicular thermal conductivity and can effectively localize the thermal energy for rapid evaporation. Meanwhile, the brine is guided to transport from the support L‐wood (“”) to the centerline of the top evaporator and then toward the double edge (“”), during which clean water is evaporated and salt is crystallized at the edge. The T‐shape evaporator demonstrates a high evaporation rate of 2.43 kg m−2 h−1 under 1 sun irradiation, and is stable for 7 days of the outdoor operation, which simultaneously realizes clean water evaporation and salt collection (including Cu2+, CrO42−, Co2+), and achieves zero‐liquid discharge. Therefore, the T‐shape design provides an effective strategy for high performance wastewater treatment.

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“…Current wastewater treatment methods include reverse osmosis (RO) [3], nanofiltration (NF) [4], electrodialysis [5], microbial treatment [6], multi-effect evaporation [7], and mechanical vapor recompression (MVR) [8]. Ye et al [9] combined desalination and photocatalytic circulation technology to treat wastewater.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on a Closed-Cycle Humidification and Dehumidification System for Treating Wastewater Containing High Concentrations of Inorganic Salts and Organic Matter

Liu

Sun²,

Yv³

et al. 2021

Processes

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Industrial wastewater contains high concentrations of inorganic salts and organic matter. This experiment studied a system for treating wastewater containing high concentrations of inorganic salts and organic matter. The setup consists of a closed-cycle humidification and dehumidification system and a filter press. Chemical wastewater was used as the treatment solution, and the treatment performance of the system was tested and analyzed. The system effectively reduced the chemical oxygen demand (COD), electric conductivity (EC), total nitrogen (TN), and ammonia nitrogen (NH4-N) in the wastewater and, at the same time, dehydrated sludge was obtained through a filter press. The system maintains a stable removal rate of each index (COD, EC, TN, and NH4-N) in wastewater and can remove inorganic salts and organic matter from wastewater. The system can successfully treat industrial wastewater containing high concentrations of inorganic salts and organic matter.

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Evaluation of mechanical vapor recompression crystallization process for treatment of high salinity wastewater

Cited by 68 publications

References 38 publications

Pilot‐Scale Study on Salt Separation of Industrial High‐Salt Wastewater Based on Nanofiltration

Pilot‐Scale Study on Salt Separation of Industrial High‐Salt Wastewater Based on Nanofiltration

Anisotropic Evaporator with a T‐Shape Design for High‐Performance Solar‐Driven Zero‐Liquid Discharge

Experimental Study on a Closed-Cycle Humidification and Dehumidification System for Treating Wastewater Containing High Concentrations of Inorganic Salts and Organic Matter

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