Comprehensive insights into performance of water gap and air gap membrane distillation modules using hollow fiber membranes
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Environmental Science and Engineering Program
Biological and Environmental Science and Engineering (BESE) Division
Online Publication Date2021-12-22
Print Publication Date2022-03
Embargo End Date2023-12-22
Permanent link to this recordhttp://hdl.handle.net/10754/674140
MetadataShow full item record
AbstractA commercially available microporous polypropylene hollow fiber membranes were employed for air gap and water gap membrane distillation (i.e., AGMD and WGMD, respectively) processes. In both configurations, the outer surface of commercially available dense polypropylene hollow fibers was used as the condensing surface of the permeate. The performance levels of the AGMD and WGMD processes utilizing microporous polyvinylidene fluoride membranes fabricated in-house were compared with those using polypropylene membranes. Under the given specific operating conditions, the maximum mean permeation flux values in AGMD and WGMD using polypropylene hollow fiber membranes were approximately 24 and 27 kg/m2h, respectively. In addition, theoretical studies on AGMD and WGMD using the designed hollow fiber module configuration were performed. The predicted results were found to well agree with the experimental results, thus verifying their validity. Moreover, parametric studies were conducted to identify the optimum evaporation-to-condensation surface area ratio (i.e., optimum numbers of hollow fiber membranes and hollow fiber condensers) in terms of specific energy consumption.
CitationIm, B.-G., Francis, L., Santosh, R., Kim, W.-S., Ghaffour, N., & Kim, Y.-D. (2022). Comprehensive insights into performance of water gap and air gap membrane distillation modules using hollow fiber membranes. Desalination, 525, 115497. doi:10.1016/j.desal.2021.115497
SponsorsThis study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2021R1F1A105013511) and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20194010201740).
Showing items related by title, author, creator and subject.
Graphene-coated hollow fiber membrane as the cathode in anaerobic electrochemical membrane bioreactors – Effect of configuration and applied voltage on performance and membrane foulingWerner, Craig M.; Katuri, Krishna; Rao, Hari Ananda; Chen, Wei; Lai, Zhiping; Logan, Bruce E.; Amy, Gary L.; Saikaly, Pascal (Environmental Science & Technology, American Chemical Society (ACS), 2016-01-06) [Article]Electrically conductive, graphene-coated hollow-fiber porous membranes were used as cathodes in anaerobic electrochemical membrane bioreactors (AnEMBRs) operated at different applied voltages (0.7 V and 0.9 V) using a new rectangular reactor configuration, compared to a previous tubular design (0.7 V). The onset of biofouling was delayed and minimized in rectangular reactors operated at 0.9 V, compared to those at 0.7 V due to higher rates of hydrogen production. Maximum transmembrane pressures for the rectangular reactor were only 0.10 bar (0.7 V) or 0.05 bar (0.9 V) after 56 days of operation, compared to 0.46 bar (0.7 V) for the tubular reactor after 52 days. The thickness of the membrane biofouling layer was approximately 0.4 µm for rectangular reactors and 4 µm for the tubular reactor. Higher permeate quality (TSS = 0.05 mg/L) was achieved in the rectangular AnEMBR than the tubular AnEMBR (TSS = 17 mg/L), likely due to higher current densities that minimized the accumulation of cells in suspension. These results show that the new rectangular reactor design, which had increased rates of hydrogen production, successfully delayed the onset of cathode biofouling and improved reactor performance.
Synthesis a new Membrane from the Nano-Cellulose Membrane and Nano-Ceramic Membrane in Bioreactor System into the Microbial Fuel Cell for Sewage Treatment by AlgaeAlsahli, Rawan (2019-01-27) [Poster]The problems of water shortage in the Middle East and North Africa (MENA) regions are well documented. The population, having more than doubled in the past 30 years to about 280 million, could double again in the next 30 years. As the population has grown against a background of finite freshwater resources, so the water available to individuals has fallen dramatically. A complete study examining the influence of through biological system will be used. Biological systems with algae within the microbial cell will be used in sewage purification in a sustainable and environmentally friendly manner. Biological wastewater treatment harnesses the action of bacteria and other microorganisms to clean water. It is used worldwide because it’s effective and more economical than many mechanical or chemical processes. We will use algae biomass to treat water from biological contaminants. To remove phosphorus, nitrogen, and ammonia. We will use a nano-cellulose membrane and nano ceramic membrane to make them as one membrane to filter water from chemical contaminants such as heavy metals and other contaminants. We will use algae biomass to treat water from biological contaminants. To remove phosphorus, nitrogen, and ammonia. We will use a nano-cellulose membrane and nano ceramic membrane to make them as one membrane to filter water from chemical contaminants such as heavy metals and other contaminants. Cellulose nanomaterials membrane remediation and membranes for water filtration, including their high surface area-to-volume ratio, low environmental impact, high strength, functional ability, and sustainability Ceramic nanomaterials membranes with many advantages, such as superior mechanical strength, higher chemical stability, and better acid and alkali resistant ability, have a promising prospect in water treatment fields. Hence, it is highly expected that ceramic MBR would be more sustainable for e-MBR assemble and application They will be used to synthesize a new membrane with better features and faster filtration and resistance Algae can be used in wastewater treatment for a range of purposes, including: 1. Reduction of BOD. 2. Removal of N and/or P. 3. Inhibition of coliforms. 4. Removal of heavy metals. This algae biomass could be used for: 1.methane production. 2.composting. 3.production of liquid fuels (pseudo-vegetable fuels). 4. as animal feed or in aquaculture. 5. production of fine chemicals. Heavy metal ions could be eliminated by several techniques as follows: • Chemical precipitation. • Reverse osmosis. • Electrochemical treatment techniques. • Ion exchange. • Membrane filtration. • Adsorption due to its low cost-effective, high efficiency, and simple to operate for removing trace levels of heavy metal ions. • Adsorption technology is regarded as the most promising one to remove heavy metal ions from effluents among these techniques mentioned above. Several types of materials to adsorb metal ions from aqueous solutions, such as activated: • Carbons. • Clay minerals. • Chelating materials. • Chitosan/natural zeolites. Ceramic Nanomaterials Membrane. Microbial Fuel Cells (MFCs) Cellulose Nanomaterials Membrane
Micro-and/or nano-scale patterned porous membranes, methods of making membranes, and methods of using membranesWang, Xianbin; Chen, Wei; Wang, Zhihong; Zhang, Xixiang; Yue, Weisheng; Lai, Zhiping (2015-01-22) [Patent]Embodiments of the present disclosure provide for materials that include a pre-designed patterned, porous membrane (e.g., micro- and/or nano-scale patterned), structures or devices that include a pre-designed patterned, porous membrane, methods of making pre-designed patterned, porous membranes, methods of separation, and the like.