Liquid–Liquid membrane contactors incorporating surface skin asymmetric hollow fibres of poly(4-methyl-1-pentene) for ammonium recovery as liquid fertilisers

Sheikh, Mahdi; Reig, Mònica; Vecino, Xanel; López, J.; Rezakazemi, Mashallah; Valderrama, César; Cortina, José Luis

doi:10.1016/j.seppur.2021.120212

Cited by 27 publications

(6 citation statements)

References 59 publications

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“…Hollow fiber membranes are becoming increasingly common in many areas of membrane separation processes, such as direct capture of CO2 [1], air humidification [2] extraction, for example, of heavy metals [3] or nitrogen-based liquid fertilizer [4] from wastewaters and gas separation [5], or in the wide field of water treatment and desalination processes [6], such as ultrafiltration, reverse osmosis and membrane distillation but also in several biomedical applications [7,8] (e.g., hemodialysis and blood oxygenators).…”

Section: Introductionmentioning

confidence: 99%

Influence of bundle porosity on shell-side hydrodynamics and mass transfer in regular fiber arrays: A computational study

Cancilla

Gurreri

Rosa

et al. 2023

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Influence of bundle porosity on shell-side hydrodynamics and mass transfer in regular fiber arrays: A computational study

Cancilla

Gurreri

Rosa

et al. 2023

International Journal of Heat and Mass Transfer

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“…In this context, membrane contactors have been successfully implemented for NH 3 recovery from gaseous emissions [24][25][26]. Membrane contactors have also been implemented to support a direct NH 3 recovery from wastewater [27][28][29]. This approach is based on hydrophobic membranes made of polymers highly permeable to NH 3 , which is transported through the membrane pores into the receiving liquid phase recirculating through the permeate side [20,21,30].…”

Section: Introductionmentioning

confidence: 99%

“…Ammonium sulphate, a commercial chemical fertilizer, can be generated during membrane-based NH 3 recovery when using H 2 SO 4 to boost NH 3 diffusion (Equation ( 1)) [31]. The use of H 3 PO 4 and HNO 3 on the permeate side also results in the generation of chemical fertilizers such as ammonium phosphate and ammonium nitrate, respectively [27][28][29]. In this regard, Damtie and coworkers concluded that H 2 SO 4 mediates a more effective ammonia capture than H 3 PO 4 and HNO 3 [32].…”

Section: Introductionmentioning

confidence: 99%

A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

et al. 2021

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Ammonia recovery from synthetic and real anaerobic digestates was accomplished using hydrophobic flat sheet membranes operated with H2SO4 solutions to convert ammonia into ammonium sulphate. The influence of the membrane material, flow rate (0.007, 0.015, 0.030 and 0.045 m3 h−1) and pH (7.6, 8.9, 10 and 11) of the digestate on ammonia recovery was investigated. The process was carried out with a flat sheet configuration at a temperature of 35 °C and with a 1 M, or 0.005 M, H2SO4 solution on the other side of the membrane. Polytetrafluoroethylene membranes with a nominal pore radius of 0.22 µm provided ammonia recoveries from synthetic and real digestates of 84.6% ± 1.0% and 71.6% ± 0.3%, respectively, for a membrane area of 8.6 × 10−4 m2 and a reservoir volume of 0.5 L, in 3.5 h with a 1 M H2SO4 solution and a recirculation flow on the feed side of the membrane of 0.030 m3 h−1. NH3 recovery followed first order kinetics and was faster at higher pHs of the H2SO4 solution and recirculation flow rate on the membrane feed side. Fouling resulted in changes in membrane surface morphology and pore size, which were confirmed by Atomic Force Microscopy and Air Displacement Porometry.

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“…Previous studies have tested different trapping solutions in the TMCA process, such as sulfuric acid [30,31], nitric acid [32,33], phosphoric acid [32,33], and deionized water [34,35], among others. Furthermore, there are studies on the efficiency of organic trapping solutions as well, such as sunflower oil [36].…”

Section: Introductionmentioning

confidence: 99%

Transmembrane Chemical Absorption Process for Recovering Ammonia as an Organic Fertilizer Using Citric Acid as the Trapping Solution

Reyes Alva,

Mohr,

Zibek

2024

Membranes

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Membrane contactors are among the available technologies that allow a reduction in the amount of ammoniacal nitrogen released into the environment through a process called transmembrane chemical absorption (TMCA). This process can be operated with different substances acting as trapping solutions; however, strong inorganic acids have been studied the most. The purpose of this study was to demonstrate, at laboratory scale, the performance of citric acid as a capturing solution in TMCA processes for recovering ammonia as an organic fertilizer from anaerobic digestor reject water using membrane contactors in a liquid–liquid configuration and to compare it with the most studied solution, sulfuric acid. The experiments were carried out at 22 °C and 40 °C and with a feed water pH of 10 and 10.5. When the system was operated at pH 10, the rates of recovered ammonia from the feed solution obtained with citric acid were 10.7–16.5 percentage points (pp) lower compared to sulfuric acid, and at pH 10.5, the difference decreased to 5–10 pp. Under all tested conditions, the water vapor transport in the system was lower when using citric acid as the trapping solution, and at pH 10 and 40 °C, it was 5.7 times lower. When estimating the operational costs for scaling up the system, citric acid appears to be a better option than sulfuric acid as a trapping solution, but in both cases, the process was not profitable under the studied conditions.

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Liquid–Liquid membrane contactors incorporating surface skin asymmetric hollow fibres of poly(4-methyl-1-pentene) for ammonium recovery as liquid fertilisers

Cited by 27 publications

References 59 publications

Influence of bundle porosity on shell-side hydrodynamics and mass transfer in regular fiber arrays: A computational study

Influence of bundle porosity on shell-side hydrodynamics and mass transfer in regular fiber arrays: A computational study

A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

Transmembrane Chemical Absorption Process for Recovering Ammonia as an Organic Fertilizer Using Citric Acid as the Trapping Solution

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