Performance Investigation of a novel direct contact membrane distillation unit with air bubble injection

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL Separation and Purification Technology Pub Date : 2025-01-30 DOI:10.1016/j.seppur.2025.131865

Dahiru U. Lawal, Muaz Abdallah, Wail Falath, Turki Baroud, Ahmad Hussaini Jagaba, Sani I. Abba, Jamilu Usman, Suhaib M. Alawad, Mohammed Antar, Isam H. Aljundi, Qusay F. Alsalhy

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Abstract

This study proposes, develops, and evaluates a novel air-assisted direct contact membrane distillation (DCMD) unit incorporating a dual vapor condensation mechanism to enhance productivity and energy efficiency. Unlike previous studies focusing solely on an air bubble injection to improve heat and mass transfer, this research introduces an external bubble column dehumidifier to recover vapor from the air-saturated feed stream, achieving a secondary condensation process. The innovative design mitigates fouling and scaling, improves thermal efficiency, and enhances distillate flux. Experimental results demonstrate an 18% increase in condensate flux, a 7% reduction in specific thermal energy consumption, and a 7% increase in the gained output ratio compared to conventional DCMD systems. The air injection also contributes over 150% to flux improvement by reducing concentration and temperature polarization effects. This advancement establishes a practical and scalable solution for sustainable water desalination under different conditions including feed salinity, feed temperature and flowrate, coolant flowrate and temperature, and air injection flowrate.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.